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From Gábor Hermann <m...@gaborhermann.com>
Subject Re: Flink streaming job with iterations gets stuck waiting for network buffers
Date Mon, 03 Apr 2017 17:37:23 GMT
Hi Andrey,

As Paris has explained it, this is a known issue and there are ongoing 
efforts to solve it.

I can suggest a workaround: limit the amount of messages sent into the 
iteration manually. You can do this with a e.g. a Map operator that 
limits records per seconds and simply sends what it has received. You 
can check at every incoming record whether the limit has been reached, 
and if so Thread.sleep until the next second. You could place Map 
operator before the operator that ingests data into the iteration 
(operator with ID 9 in your dataflow graph). This way you can avoid 
overloading the network inside the iteration, and thus avoid deadlock 
caused by backpressure.

This approach is, of course, a bit hacky. Also, it does not eliminate 
the possibility of a deadlock entirely. Other disadvantage is that you 
have to manually tune the rate of ingesting. That could depend on lot of 
things: the data load, the number of operator instances, the placement 
of operator instances, etc. But I have used something like this as a 
temporary workaround until we see more progress with FLIP-15.

Cheers,
Gabor


On 2017-04-03 13:33, Paris Carbone wrote:
> Hi Andrey,
>
> If I am not mistaken this sounds like a known deadlock case and can be caused by the combination of Flink's backpressure mechanism with iterations (more likely when there is heavy feedback load).
> Keep in mind that, currently, iterations are (perhaps the only) not stable feature to use. The good news is that there is a complete redesign planned for it (partly FLIP-15 [1]) that has to entirely address this pending flow control issue as well.
>
> Increasing network buffers or feedback queue capacity to a really high number decreases the possibility of the deadlock but does not eliminate it.
> I really cannot think of a quick solution to the problem that does not involve some deep changes.
>
> I am CCing dev since this seems like a very relevant use case to revive the discussion for the loops redesign and also keep you in the loop (no pun intended) regarding this specific issue.
> Will also update FLIP-15 with several interesting proposals under discussion from Stephan to tackle this issue.
>
> cheers,
> Paris
>
> [1] https://cwiki.apache.org/confluence/display/FLINK/FLIP-15+Scoped+Loops+and+Job+Termination
>
>
> On 3 Apr 2017, at 12:54, Andrey Melentyev <andrey.melentyev@gmail.com<mailto:andrey.melentyev@gmail.com>> wrote:
>
> Hi,
>
> I have a Flink 1.2.0 streaming job using a number of stateful operators and an iteration loop with a RichFlatMapFunction inside. On the high level, the app reads some data, massages it and feeds into an iterative algorithm which produces some output and feedback while keeping the state. All stateful operators are on KeyedStreams. Input is some data on file system and output is stdout.
>
> The implementation passes functional tests but when tested with noticeable amounts of input data (tens of thousands records, dozens of MB raw data) after a few seconds of good throughput, backpressure kicks in and the application essentially gets stuck: most of the threads are blocked waiting for buffers, occasional message gets processed every few minutes. There's nothing strange in the log files.
>
> The behaviour is reproducible both in local execution environment and in Flink standalone cluster (started using jobmanager.sh and taskmanager.sh)
>
> The problematic part is likely in the iterations since the part of the job before iterations works fine with the same data.
>
> I would appreciate pointers as to how to debug this. taskmanager.network.numberOfBuffers from the config sounds relevant but the default value of 2048 is already much higher than slots-per-TM^2 * #TMs * 4 = 4^2 * 1 * 4 = 64.
>
> Attaching flink config, job execution plan and thread dump with some sensitive parts retracted.
>
> flink-conf.yml
>
> jobmanager.rpc.address: localhost
> jobmanager.rpc.port: 6123
> jobmanager.heap.mb: 512
> taskmanager.heap.mb: 8192
> taskmanager.numberOfTaskSlots: 4
> taskmanager.memory.preallocate: false
> parallelism.default: 4
> jobmanager.web.port: 8081
> state.backend: rocksdb
> state.backend.fs.checkpointdir: file:///Users/andrey.melentyev/tmp/flink-checkpoints
>
> Job execution plan
>
> {
>    "nodes": [
>      {
>        "contents": "IterationSource-10",
>        "id": -1,
>        "pact": "Data Source",
>        "parallelism": 8,
>        "type": "IterationSource-10"
>      },
>      {
>        "contents": "Source: Custom File Source",
>        "id": 1,
>        "pact": "Data Source",
>        "parallelism": 1,
>        "type": "Source: Custom File Source"
>      },
>      {
>        "contents": "Split Reader: Custom File Source",
>        "id": 2,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 1,
>            "ship_strategy": "REBALANCE",
>            "side": "second"
>          }
>        ],
>        "type": "Split Reader: Custom File Source"
>      },
>      {
>        "contents": "Parse JSON",
>        "id": 3,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 2,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Parse JSON"
>      },
>      {
>        "contents": "Split records",
>        "id": 4,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 3,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Split records (Stateless)"
>      },
>      {
>        "contents": "Produce Some Data",
>        "id": 6,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 3,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Produce Some Data (Stateless)"
>      },
>      {
>        "contents": "Produce Some More Data (Stateful)",
>        "id": 7,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 4,
>            "ship_strategy": "HASH",
>            "side": "second"
>          }
>        ],
>        "type": "Produce Some More Data (Stateful)"
>      },
>      {
>        "contents": "Map",
>        "id": 9,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 6,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          },
>          {
>            "id": 7,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Map"
>      },
>      {
>        "contents": "Iteration Step Function",
>        "id": 12,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 9,
>            "ship_strategy": "HASH",
>            "side": "second"
>          },
>          {
>            "id": -1,
>            "ship_strategy": "HASH",
>            "side": "second"
>          }
>        ],
>        "type": "Iteration Step Function"
>      },
>      {
>        "contents": "Flat Map / Iteration Feedback",
>        "id": 13,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 12,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Flat Map / Iteration Feedback"
>      },
>      {
>        "contents": "Iterative Algorithm (Stateful)",
>        "id": 14,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 12,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Iterative Algorithm (Stateful)"
>      },
>      {
>        "contents": "Flat Map / Iteration Result",
>        "id": 15,
>        "pact": "Operator",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 14,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Flat Map / Iteration Result"
>      },
>      {
>        "contents": "IterationSink-10",
>        "id": -2,
>        "pact": "Data Sink",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 13,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "IterationSink-10"
>      },
>      {
>        "contents": "Sink: stdout",
>        "id": 16,
>        "pact": "Data Sink",
>        "parallelism": 8,
>        "predecessors": [
>          {
>            "id": 15,
>            "ship_strategy": "FORWARD",
>            "side": "second"
>          }
>        ],
>        "type": "Sink: stdout"
>      }
>    ]
> }
>
>
> Thread dump
>
> 2017-04-03 12:15:51
> Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.112-b16 mixed mode):
>
> "Thread-22" #531 daemon prio=5 os_prio=31 tid=0x00007f9ca0054000 nid=0x140af in Object.wait() [0x0000700008d6f000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007ab00e210> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007ab0605b0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collect(StreamSourceContexts.java:84)
> - locked <0x00000007ab00ccc8> (a java.lang.Object)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator$SplitReader.run(ContinuousFileReaderOperator.java:321)
> - locked <0x00000007ab00ccc8> (a java.lang.Object)
>
> "Thread-21" #530 daemon prio=5 os_prio=31 tid=0x00007f9c9f019800 nid=0xb61f in Object.wait() [0x000070000a8c0000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007ab86fb30> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007ab8c3800> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at play.api.libs.json.JsResult$class.fold(JsResult.scala:72)
> at play.api.libs.json.JsSuccess.fold(JsResult.scala:9)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collect(StreamSourceContexts.java:84)
> - locked <0x00000007ab86e5e8> (a java.lang.Object)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator$SplitReader.run(ContinuousFileReaderOperator.java:321)
> - locked <0x00000007ab86e5e8> (a java.lang.Object)
>
> "Thread-20" #529 daemon prio=5 os_prio=31 tid=0x00007f9c9ff9b000 nid=0x13217 in Object.wait() [0x000070000a7bd000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007aae18048> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007aae6c6e8> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at play.api.libs.json.JsResult$class.fold(JsResult.scala:72)
> at play.api.libs.json.JsSuccess.fold(JsResult.scala:9)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collect(StreamSourceContexts.java:84)
> - locked <0x00000007aae16b00> (a java.lang.Object)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator$SplitReader.run(ContinuousFileReaderOperator.java:321)
> - locked <0x00000007aae16b00> (a java.lang.Object)
>
> "Thread-19" #528 daemon prio=5 os_prio=31 tid=0x00007f9c9c02e000 nid=0xe31b in Object.wait() [0x000070000a6ba000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007ab60e208> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007ab661430> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at play.api.libs.json.JsResult$class.fold(JsResult.scala:72)
> at play.api.libs.json.JsSuccess.fold(JsResult.scala:9)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collect(StreamSourceContexts.java:84)
> - locked <0x00000007ab60ccc0> (a java.lang.Object)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator$SplitReader.run(ContinuousFileReaderOperator.java:321)
> - locked <0x00000007ab60ccc0> (a java.lang.Object)
>
> "OutputFlusher" #527 daemon prio=5 os_prio=31 tid=0x00007f9c9f042000 nid=0xa313 waiting on condition [0x000070000a5b7000]
>     java.lang.Thread.State: TIMED_WAITING (sleeping)
> at java.lang.Thread.sleep(Native Method)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:173)
>
> "OutputFlusher" #512 daemon prio=5 os_prio=31 tid=0x00007f9c9f8fc000 nid=0xeb13 waiting for monitor entry [0x000070000a4b4000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a8e785c0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #515 daemon prio=5 os_prio=31 tid=0x00007f9c9ff9a800 nid=0x15333 waiting for monitor entry [0x000070000a3b1000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a80609b0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #526 daemon prio=5 os_prio=31 tid=0x00007f9c9c02d800 nid=0x9f13 waiting on condition [0x000070000a2ae000]
>     java.lang.Thread.State: TIMED_WAITING (sleeping)
> at java.lang.Thread.sleep(Native Method)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:173)
>
> "OutputFlusher" #520 daemon prio=5 os_prio=31 tid=0x00007f9c9f9dc000 nid=0x13c3f waiting for monitor entry [0x000070000a1ab000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007aa254c48> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #524 daemon prio=5 os_prio=31 tid=0x00007f9c9dbb4800 nid=0x1012b waiting for monitor entry [0x0000700009fa5000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007ab0605b0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #523 daemon prio=5 os_prio=31 tid=0x00007f9c9d804000 nid=0x1095f waiting on condition [0x0000700009ea2000]
>     java.lang.Thread.State: TIMED_WAITING (sleeping)
> at java.lang.Thread.sleep(Native Method)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:173)
>
> "OutputFlusher" #522 daemon prio=5 os_prio=31 tid=0x00007f9c9cc8b000 nid=0x1311f waiting for monitor entry [0x0000700009d9f000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007abe4f398> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #521 daemon prio=5 os_prio=31 tid=0x00007f9ca08de000 nid=0xf70f waiting for monitor entry [0x0000700009b99000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007ab8c3800> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #519 daemon prio=5 os_prio=31 tid=0x00007f9c9d803800 nid=0xbe13 waiting for monitor entry [0x0000700009a96000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a86a53f0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #518 daemon prio=5 os_prio=31 tid=0x00007f9c9f39c800 nid=0xb517 waiting for monitor entry [0x0000700009993000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007ac27c5e0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #517 daemon prio=5 os_prio=31 tid=0x00007f9c9c07a800 nid=0xaa1b waiting for monitor entry [0x0000700009890000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007aae6c6e8> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #516 daemon prio=5 os_prio=31 tid=0x00007f9c9d802800 nid=0xc713 waiting for monitor entry [0x000070000978d000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a9c4bf48> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #514 daemon prio=5 os_prio=31 tid=0x00007f9c9cc90000 nid=0x15a33 waiting for monitor entry [0x000070000968a000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007ac46b850> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #513 daemon prio=5 os_prio=31 tid=0x00007f9c9d839000 nid=0xe80f waiting on condition [0x0000700009587000]
>     java.lang.Thread.State: TIMED_WAITING (sleeping)
> at java.lang.Thread.sleep(Native Method)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:173)
>
> "OutputFlusher" #511 daemon prio=5 os_prio=31 tid=0x00007f9c9f9da800 nid=0x132b waiting for monitor entry [0x0000700009484000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007aa914af0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #503 daemon prio=5 os_prio=31 tid=0x00007f9ca078c800 nid=0xcf0f waiting for monitor entry [0x0000700009381000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007ac873cd0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #510 daemon prio=5 os_prio=31 tid=0x00007f9c9f39c000 nid=0x1021b waiting for monitor entry [0x000070000927e000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a94632e0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #509 daemon prio=5 os_prio=31 tid=0x00007f9c9fe14800 nid=0x14943 waiting for monitor entry [0x000070000917b000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a907b6b8> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #508 daemon prio=5 os_prio=31 tid=0x00007f9ca0055000 nid=0x13897 waiting for monitor entry [0x0000700009078000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a984d400> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #507 daemon prio=5 os_prio=31 tid=0x00007f9c9fe16800 nid=0x11e0f waiting for monitor entry [0x0000700008f75000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007ab661430> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #506 daemon prio=5 os_prio=31 tid=0x00007f9c9d9f4800 nid=0x15c67 waiting for monitor entry [0x0000700008e72000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007aa451428> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #504 daemon prio=5 os_prio=31 tid=0x00007f9c9e0af000 nid=0x1293b waiting for monitor entry [0x0000700008c6c000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a7c8df08> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "OutputFlusher" #502 daemon prio=5 os_prio=31 tid=0x00007f9ca00a1800 nid=0x128a7 waiting for monitor entry [0x0000700008b69000]
>     java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flush(RecordWriter.java:175)
> - waiting to lock <0x00000007a8c89000> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter$OutputFlusher.run(StreamRecordWriter.java:185)
>
> "CloseableReaperThread" #501 daemon prio=5 os_prio=31 tid=0x00007f9ca0990800 nid=0xf013 in Object.wait() [0x0000700008a66000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a72017e8> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "CloseableReaperThread" #500 daemon prio=5 os_prio=31 tid=0x00007f9c9f147800 nid=0xdd0f in Object.wait() [0x0000700008963000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a7001010> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "IterationSink-10 (4/4)" #499 daemon prio=5 os_prio=31 tid=0x00007f9ca0990000 nid=0xa913 waiting on condition [0x0000700008860000]
>     java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000007abe79428> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at java.util.concurrent.ArrayBlockingQueue.offer(ArrayBlockingQueue.java:379)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:112)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:85)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$RecordPusher.processElement(StreamIterationTail.java:71)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a720e830> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "IterationSink-10 (3/4)" #498 daemon prio=5 os_prio=31 tid=0x00007f9c9d98b000 nid=0xd417 waiting on condition [0x000070000875d000]
>     java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000007ac2a63b8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at java.util.concurrent.ArrayBlockingQueue.offer(ArrayBlockingQueue.java:379)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:112)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:85)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$RecordPusher.processElement(StreamIterationTail.java:71)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a700bc80> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #497 daemon prio=5 os_prio=31 tid=0x00007f9c9f81d000 nid=0x1071b in Object.wait() [0x000070000865a000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a7401010> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "IterationSink-10 (2/4)" #496 daemon prio=5 os_prio=31 tid=0x00007f9c9f81c800 nid=0xf617 waiting on condition [0x0000700008557000]
>     java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000007ac495778> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at java.util.concurrent.ArrayBlockingQueue.offer(ArrayBlockingQueue.java:379)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:112)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:85)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$RecordPusher.processElement(StreamIterationTail.java:71)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a740bc80> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #495 daemon prio=5 os_prio=31 tid=0x00007f9c9f147000 nid=0xf213 in Object.wait() [0x0000700008454000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a78017f0> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "IterationSink-10 (1/4)" #494 daemon prio=5 os_prio=31 tid=0x00007f9c9f9b0000 nid=0x11563 waiting on condition [0x0000700008351000]
>     java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000007ac89dd48> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at java.util.concurrent.ArrayBlockingQueue.offer(ArrayBlockingQueue.java:379)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:112)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$IterationTailOutput.collect(StreamIterationTail.java:85)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationTail$RecordPusher.processElement(StreamIterationTail.java:71)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a780c460> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #493 daemon prio=5 os_prio=31 tid=0x00007f9ca003a800 nid=0x11427 in Object.wait() [0x000070000824e000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a7c015b8> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "CloseableReaperThread" #492 daemon prio=5 os_prio=31 tid=0x00007f9c9f146000 nid=0xd517 in Object.wait() [0x000070000814b000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a80015b8> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Iteration Step Function -> (Flat Map, Iterative Algorithm (Stateful) -> Flat Map -> Sink: stdout) (4/4)" #491 daemon prio=5 os_prio=31 tid=0x00007f9c9c07a000 nid=0x10f1b in Object.wait() [0x0000700008047000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a7c0e6e0> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a7c8df08> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.Iterator$class.foreach(Iterator.scala:742)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a7c0cd98> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #490 daemon prio=5 os_prio=31 tid=0x00007f9ca0039800 nid=0xb00f in Object.wait() [0x0000700007f45000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a86179d0> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Iteration Step Function -> (Flat Map, Iterative Algorithm (Stateful) -> Flat Map -> Sink: stdout) (3/4)" #489 daemon prio=5 os_prio=31 tid=0x00007f9c9c015800 nid=0x14d4f in Object.wait() [0x0000700007e41000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a800e6e0> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a80609b0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.Iterator$class.foreach(Iterator.scala:742)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a800cd98> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "Iteration Step Function -> (Flat Map, Iterative Algorithm (Stateful) -> Flat Map -> Sink: stdout) (2/4)" #488 daemon prio=5 os_prio=31 tid=0x00007f9c9d98a000 nid=0xdc0f in Object.wait() [0x0000700007d3e000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a8624af8> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a86a53f0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.Iterator$class.foreach(Iterator.scala:742)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a86231b0> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #487 daemon prio=5 os_prio=31 tid=0x00007f9c9ccd5800 nid=0xd91b in Object.wait() [0x0000700007c3c000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a8e19be8> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Iteration Step Function -> (Flat Map, Iterative Algorithm (Stateful) -> Flat Map -> Sink: stdout) (1/4)" #485 daemon prio=5 os_prio=31 tid=0x00007f9c99f9b800 nid=0xda1b in Object.wait() [0x0000700007b38000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a8e26d10> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a8e785c0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6$$anonfun$flatMap$1.apply(DataStream.scala:577)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at org.apache.flink.streaming.api.scala.DataStream$$anon$6.flatMap(DataStream.scala:577)
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:422)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:407)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:462)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:430)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.Iterator$class.foreach(Iterator.scala:742)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a8e253c8> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #486 daemon prio=5 os_prio=31 tid=0x00007f9c9f145800 nid=0xe70f in Object.wait() [0x0000700007a36000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a8c00e58> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Map (4/4)" #484 daemon prio=5 os_prio=31 tid=0x00007f9ca0956000 nid=0xea13 in Object.wait() [0x0000700007933000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a8c0cc38> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a8c89000> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:38)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a8c0ba38> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #483 daemon prio=5 os_prio=31 tid=0x00007f9c9e03c800 nid=0x157c3 in Object.wait() [0x0000700007830000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a9000e58> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Map (3/4)" #482 daemon prio=5 os_prio=31 tid=0x00007f9c9e0c8000 nid=0xd70f in Object.wait() [0x000070000772d000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a900cc20> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a907b6b8> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:38)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a900ba20> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #481 daemon prio=5 os_prio=31 tid=0x00007f9c9daff800 nid=0x11f13 in Object.wait() [0x000070000762a000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a9400e58> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Map (2/4)" #480 daemon prio=5 os_prio=31 tid=0x00007f9ca0955000 nid=0xac17 in Object.wait() [0x0000700007527000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a940cc38> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a94632e0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:38)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a940ba38> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #479 daemon prio=5 os_prio=31 tid=0x00007f9ca0954800 nid=0xc30f in Object.wait() [0x0000700007424000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a9800e58> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Map (1/4)" #478 daemon prio=5 os_prio=31 tid=0x00007f9c9ca80000 nid=0x15b0f in Object.wait() [0x0000700007321000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a980ccc8> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a984d400> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:38)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a980bac8> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #477 daemon prio=5 os_prio=31 tid=0x00007f9c9c014800 nid=0x10a1f in Object.wait() [0x000070000721e000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007a9c017d0> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Cross Edges (4/4)" #476 daemon prio=5 os_prio=31 tid=0x00007f9c9d86a000 nid=0x10413 in Object.wait() [0x000070000711b000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007a9c0d600> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007a9c4bf48> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.immutable.List.foreach(List.scala:381)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007a9c0c3f0> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #475 daemon prio=5 os_prio=31 tid=0x00007f9c9c017800 nid=0x9e0f in Object.wait() [0x0000700007018000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007aa200ff8> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Cross Edges (3/4)" #474 daemon prio=5 os_prio=31 tid=0x00007f9ca0938800 nid=0xe013 in Object.wait() [0x0000700006f15000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007aa20ce28> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007aa254c48> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.immutable.List.foreach(List.scala:381)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007aa20bc18> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #473 daemon prio=5 os_prio=31 tid=0x00007f9c9f03d800 nid=0x13517 in Object.wait() [0x0000700006e12000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007aa401000> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Cross Edges (2/4)" #472 daemon prio=5 os_prio=31 tid=0x00007f9c9f03c800 nid=0xc50f in Object.wait() [0x0000700006d0f000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007aa40ce30> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007aa451428> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.immutable.List.foreach(List.scala:381)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007aa40bc20> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #471 daemon prio=5 os_prio=31 tid=0x00007f9c9c0cd000 nid=0xab17 in Object.wait() [0x0000700006c0c000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007aa8017d0> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Cross Edges (1/4)" #470 daemon prio=5 os_prio=31 tid=0x00007f9c99f9d000 nid=0xc40f in Object.wait() [0x0000700006b09000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007aa80d600> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007aa914af0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:797)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:775)
> at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> ...
> at scala.collection.immutable.List.foreach(List.scala:381)
> ...
> at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)
> at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:185)
> - locked <0x00000007aa80c3f0> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #469 daemon prio=5 os_prio=31 tid=0x00007f9ca0e75800 nid=0x1002f in Object.wait() [0x0000700006a06000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007aae0b7a0> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Split Reader: Custom File Source -> Parse JSON -> (Explode Assets, Self Edges) (4/4)" #468 daemon prio=5 os_prio=31 tid=0x00007f9c9c828000 nid=0xa113 in Object.wait() [0x0000700006903000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.close(ContinuousFileReaderOperator.java:204)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.closeAllOperators(StreamTask.java:405)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:294)
> - locked <0x00000007aae16b00> (a java.lang.Object)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #467 daemon prio=5 os_prio=31 tid=0x00007f9c9f80a000 nid=0xc613 in Object.wait() [0x0000700006800000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007ab001968> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Split Reader: Custom File Source -> Parse JSON -> (Explode Assets, Self Edges) (3/4)" #466 daemon prio=5 os_prio=31 tid=0x00007f9c9f09e000 nid=0xa013 in Object.wait() [0x00007000066fd000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.close(ContinuousFileReaderOperator.java:204)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.closeAllOperators(StreamTask.java:405)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:294)
> - locked <0x00000007ab00ccc8> (a java.lang.Object)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #465 daemon prio=5 os_prio=31 tid=0x00007f9c9e0c9800 nid=0xe10f in Object.wait() [0x00007000065fa000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007ab601960> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Split Reader: Custom File Source -> Parse JSON -> (Explode Assets, Self Edges) (2/4)" #464 daemon prio=5 os_prio=31 tid=0x00007f9c9e225000 nid=0xdb13 in Object.wait() [0x00007000064f7000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.close(ContinuousFileReaderOperator.java:204)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.closeAllOperators(StreamTask.java:405)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:294)
> - locked <0x00000007ab60ccc0> (a java.lang.Object)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #463 daemon prio=5 os_prio=31 tid=0x00007f9ca0809800 nid=0xd817 in Object.wait() [0x00007000063f4000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007ab863008> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "Split Reader: Custom File Source -> Parse JSON -> (Explode Assets, Self Edges) (1/4)" #462 daemon prio=5 os_prio=31 tid=0x00007f9ca0817800 nid=0x9d17 in Object.wait() [0x00007000062f1000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.close(ContinuousFileReaderOperator.java:204)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.closeAllOperators(StreamTask.java:405)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:294)
> - locked <0x00000007ab86e5e8> (a java.lang.Object)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #461 daemon prio=5 os_prio=31 tid=0x00007f9c9e0c6800 nid=0xb90f in Object.wait() [0x00007000061ee000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007abe017f8> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "IterationSource-10 (4/4)" #460 daemon prio=5 os_prio=31 tid=0x00007f9c99fa2000 nid=0xb80f in Object.wait() [0x00007000060eb000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007abe0d930> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007abe4f398> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationHead.run(StreamIterationHead.java:81)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #459 daemon prio=5 os_prio=31 tid=0x00007f9c9f0a6000 nid=0x11a0f in Object.wait() [0x0000700005fe8000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007ac22bfe8> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "IterationSource-10 (3/4)" #458 daemon prio=5 os_prio=31 tid=0x00007f9c9c0dd000 nid=0x1200f in Object.wait() [0x0000700005ee5000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007ac238120> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007ac27c5e0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationHead.run(StreamIterationHead.java:81)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #457 daemon prio=5 os_prio=31 tid=0x00007f9c9c104000 nid=0x1181b in Object.wait() [0x0000700005de2000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007ac4184d0> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "IterationSource-10 (2/4)" #456 daemon prio=5 os_prio=31 tid=0x00007f9c9d867000 nid=0xa61b in Object.wait() [0x0000700005cdf000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007ac4269e0> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007ac46b850> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationHead.run(StreamIterationHead.java:81)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "CloseableReaperThread" #455 daemon prio=5 os_prio=31 tid=0x00007f9c9f80e800 nid=0x15e0f in Object.wait() [0x0000700005bdc000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000007ac801800> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at org.apache.flink.core.fs.SafetyNetCloseableRegistry$CloseableReaperThread.run(SafetyNetCloseableRegistry.java:145)
>
> "IterationSource-10 (1/4)" #454 daemon prio=5 os_prio=31 tid=0x00007f9c9cabd800 nid=0xb20f in Object.wait() [0x0000700005ad9000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:168)
> - locked <0x00000007ac80dcd8> (a java.util.ArrayDeque)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:138)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:131)
> - locked <0x00000007ac873cd0> (a org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:88)
> at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:72)
> at org.apache.flink.streaming.runtime.tasks.StreamIterationHead.run(StreamIterationHead.java:81)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> at java.lang.Thread.run(Thread.java:745)
>
> "Attach Listener" #403 daemon prio=9 os_prio=31 tid=0x00007f9c9c271800 nid=0xfa3f waiting on condition [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "flink-akka.actor.default-dispatcher-21" #402 daemon prio=5 os_prio=31 tid=0x00007f9c99f9f800 nid=0x14597 waiting on condition [0x00007000056cd000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-20" #401 daemon prio=5 os_prio=31 tid=0x00007f9ca098c000 nid=0x13dab waiting on condition [0x00007000055ca000]
>     java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.idleAwaitWork(ForkJoinPool.java:2135)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2067)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-19" #184 daemon prio=5 os_prio=31 tid=0x00007f9ca0583800 nid=0xf807 waiting on condition [0x00007000053c4000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-18" #183 daemon prio=5 os_prio=31 tid=0x00007f9c9f8b9000 nid=0xde13 waiting on condition [0x00007000052c1000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-17" #182 daemon prio=5 os_prio=31 tid=0x00007f9ca013f800 nid=0xfc17 waiting on condition [0x00007000051be000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-16" #175 daemon prio=5 os_prio=31 tid=0x00007f9c9f8ea800 nid=0xec07 waiting on condition [0x00007000058d3000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-15" #174 daemon prio=5 os_prio=31 tid=0x00007f9c9f851000 nid=0xee07 waiting on condition [0x00007000054c7000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "Flink-MetricRegistry-1" #47 prio=5 os_prio=31 tid=0x00007f9c9f026000 nid=0x1407 waiting on condition [0x00007000050bb000]
>     java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x000000078fd306e8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
> "Timer-0" #46 daemon prio=5 os_prio=31 tid=0x00007f9c9c016800 nid=0x9803 in Object.wait() [0x0000700004fb8000]
>     java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.util.TimerThread.mainLoop(Timer.java:552)
> - locked <0x000000078fdc3fd8> (a java.util.TaskQueue)
> at java.util.TimerThread.run(Timer.java:505)
>
> "Hashed wheel timer #1" #22 daemon prio=5 os_prio=31 tid=0x00007f9c9b1fe000 nid=0x9603 waiting on condition [0x0000700004eb5000]
>     java.lang.Thread.State: TIMED_WAITING (sleeping)
> at java.lang.Thread.sleep(Native Method)
> at org.jboss.netty.util.HashedWheelTimer$Worker.waitForNextTick(HashedWheelTimer.java:483)
> at org.jboss.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:392)
> at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at java.lang.Thread.run(Thread.java:745)
>
> "flink-akka.actor.default-dispatcher-14" #43 daemon prio=5 os_prio=31 tid=0x00007f9c9c8b9000 nid=0x9403 waiting on condition [0x0000700004db2000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "IOManager reader thread #1" #41 daemon prio=5 os_prio=31 tid=0x00007f9c9a47e000 nid=0x9203 waiting on condition [0x0000700004caf000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x000000078feef2c0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
> at org.apache.flink.runtime.io.disk.iomanager.IOManagerAsync$ReaderThread.run(IOManagerAsync.java:380)
>
> "IOManager writer thread #1" #40 daemon prio=5 os_prio=31 tid=0x00007f9c9b17c800 nid=0x9003 waiting on condition [0x0000700004bac000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x000000078fd30b90> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
> at org.apache.flink.runtime.io.disk.iomanager.IOManagerAsync$WriterThread.run(IOManagerAsync.java:486)
>
> "Flink KvStateServer EventLoop Thread 0" #27 daemon prio=5 os_prio=31 tid=0x00007f9c9d26a800 nid=0x8e03 runnable [0x0000700004aa9000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c007d2b0> (a io.netty.channel.nio.SelectedSelectionKeySet)
> - locked <0x00000005c007c4e0> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c007c400> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
> at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
> at java.lang.Thread.run(Thread.java:745)
>
> "Flink Netty Server (0) Thread 0" #35 daemon prio=5 os_prio=31 tid=0x00007f9c9d435800 nid=0x8c07 runnable [0x00007000049a6000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c00c43d8> (a io.netty.channel.nio.SelectedSelectionKeySet)
> - locked <0x00000005c00c4320> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c00c4240> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
> at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
> at java.lang.Thread.run(Thread.java:745)
>
> "New I/O server boss #6" #26 daemon prio=5 os_prio=31 tid=0x00007f9c9a46e000 nid=0x8a03 runnable [0x00007000048a3000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c01770e0> (a sun.nio.ch.Util$3)
> - locked <0x00000005c01770f0> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c0177090> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
> at org.jboss.netty.channel.socket.nio.NioServerBoss.select(NioServerBoss.java:163)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:212)
> at org.jboss.netty.channel.socket.nio.NioServerBoss.run(NioServerBoss.java:42)
> at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
> "New I/O worker #5" #25 daemon prio=5 os_prio=31 tid=0x00007f9c9d2b6000 nid=0x8803 runnable [0x00007000047a0000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c01f4aa0> (a sun.nio.ch.Util$3)
> - locked <0x00000005c01f4ab0> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c01f4a50> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:68)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(AbstractNioSelector.java:415)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:212)
> at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
> at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
> at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
> "New I/O worker #4" #24 daemon prio=5 os_prio=31 tid=0x00007f9c9d2d2000 nid=0x8603 runnable [0x000070000469d000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c016e278> (a sun.nio.ch.Util$3)
> - locked <0x00000005c016e288> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c016e228> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:68)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(AbstractNioSelector.java:415)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:212)
> at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
> at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
> at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
> "New I/O boss #3" #23 daemon prio=5 os_prio=31 tid=0x00007f9c9d2d1000 nid=0x8403 runnable [0x000070000459a000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c017e048> (a sun.nio.ch.Util$3)
> - locked <0x00000005c017e058> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c017dff8> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:68)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(AbstractNioSelector.java:415)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:212)
> at org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
> at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
> "New I/O worker #2" #21 daemon prio=5 os_prio=31 tid=0x00007f9c9d2b0000 nid=0x8203 runnable [0x0000700004497000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c0180070> (a sun.nio.ch.Util$3)
> - locked <0x00000005c0180080> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c0180020> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:68)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(AbstractNioSelector.java:415)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:212)
> at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
> at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
> at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
> "New I/O worker #1" #20 daemon prio=5 os_prio=31 tid=0x00007f9c9d2af800 nid=0x8003 runnable [0x0000700004394000]
>     java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005c01605c0> (a sun.nio.ch.Util$3)
> - locked <0x00000005c01605d0> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000005c0160570> (a sun.nio.ch.KQueueSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:68)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(AbstractNioSelector.java:415)
> at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:212)
> at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
> at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
> at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
> "flink-akka.remote.default-remote-dispatcher-6" #19 daemon prio=5 os_prio=31 tid=0x00007f9c9d29d800 nid=0x7e03 waiting on condition [0x0000700004291000]
>     java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c0160b80> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.idleAwaitWork(ForkJoinPool.java:2135)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2067)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.remote.default-remote-dispatcher-5" #18 daemon prio=5 os_prio=31 tid=0x00007f9c9b111000 nid=0x7c03 waiting on condition [0x000070000418e000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c0160b80> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-4" #17 daemon prio=5 os_prio=31 tid=0x00007f9c9d299000 nid=0x7a03 waiting on condition [0x000070000408b000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-3" #16 daemon prio=5 os_prio=31 tid=0x00007f9c9a45a000 nid=0x7803 waiting on condition [0x0000700003f88000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-akka.actor.default-dispatcher-2" #15 daemon prio=5 os_prio=31 tid=0x00007f9c9d298000 nid=0x7603 waiting on condition [0x0000700003e85000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c01773a0> (a akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool)
> at scala.concurrent.forkjoin.ForkJoinPool.scan(ForkJoinPool.java:2075)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>
> "flink-scheduler-1" #14 daemon prio=5 os_prio=31 tid=0x00007f9c9ab1b000 nid=0x7407 waiting on condition [0x0000700003d82000]
>     java.lang.Thread.State: TIMED_WAITING (sleeping)
> at java.lang.Thread.sleep(Native Method)
> at akka.actor.LightArrayRevolverScheduler.waitNanos(Scheduler.scala:231)
> at akka.actor.LightArrayRevolverScheduler$$anon$8.nextTick(Scheduler.scala:411)
> at akka.actor.LightArrayRevolverScheduler$$anon$8.run(Scheduler.scala:381)
> at java.lang.Thread.run(Thread.java:745)
>
> "Service Thread" #10 daemon prio=9 os_prio=31 tid=0x00007f9c9b037800 nid=0x6d03 runnable [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "C1 CompilerThread3" #9 daemon prio=9 os_prio=31 tid=0x00007f9c9a120800 nid=0x6b03 waiting on condition [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "C2 CompilerThread2" #8 daemon prio=9 os_prio=31 tid=0x00007f9c9a11f800 nid=0x6903 waiting on condition [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "C2 CompilerThread1" #7 daemon prio=9 os_prio=31 tid=0x00007f9c99f72800 nid=0x6703 waiting on condition [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "C2 CompilerThread0" #6 daemon prio=9 os_prio=31 tid=0x00007f9c99f72000 nid=0x6503 waiting on condition [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "Signal Dispatcher" #5 daemon prio=9 os_prio=31 tid=0x00007f9c99f71000 nid=0x6303 runnable [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "Surrogate Locker Thread (Concurrent GC)" #4 daemon prio=9 os_prio=31 tid=0x00007f9c9a11f000 nid=0x6003 waiting on condition [0x0000000000000000]
>     java.lang.Thread.State: RUNNABLE
>
> "Finalizer" #3 daemon prio=8 os_prio=31 tid=0x00007f9c9b035800 nid=0x5103 in Object.wait() [0x0000700003467000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
> - locked <0x00000005c0177830> (a java.lang.ref.ReferenceQueue$Lock)
> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
> at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)
>
> "Reference Handler" #2 daemon prio=10 os_prio=31 tid=0x00007f9c99f63000 nid=0x4f03 in Object.wait() [0x0000700003364000]
>     java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at java.lang.ref.Reference.tryHandlePending(Reference.java:191)
> - locked <0x00000005c0177820> (a java.lang.ref.Reference$Lock)
> at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)
>
> "main" #1 prio=5 os_prio=31 tid=0x00007f9c99808800 nid=0x1c03 waiting on condition [0x0000700001d21000]
>     java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for  <0x00000005c02ebd98> (a java.util.concurrent.CountDownLatch$Sync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
> at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
> at akka.actor.ActorSystemImpl$TerminationCallbacks.ready(ActorSystem.scala:819)
> at akka.actor.ActorSystemImpl$TerminationCallbacks.ready(ActorSystem.scala:788)
> at scala.concurrent.Await$$anonfun$ready$1.apply(package.scala:169)
> at scala.concurrent.Await$$anonfun$ready$1.apply(package.scala:169)
> at scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:53)
> at scala.concurrent.Await$.ready(package.scala:169)
> at akka.actor.ActorSystemImpl.awaitTermination(ActorSystem.scala:644)
> at akka.actor.ActorSystemImpl.awaitTermination(ActorSystem.scala:645)
> at org.apache.flink.runtime.taskmanager.TaskManager$.runTaskManager(TaskManager.scala:1805)
> at org.apache.flink.runtime.taskmanager.TaskManager$.selectNetworkInterfaceAndRunTaskManager(TaskManager.scala:1639)
> at org.apache.flink.runtime.taskmanager.TaskManager$$anon$2.call(TaskManager.scala:1548)
> at org.apache.flink.runtime.taskmanager.TaskManager$$anon$2.call(TaskManager.scala:1546)
> at org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:43)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
> at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:40)
> at org.apache.flink.runtime.taskmanager.TaskManager$.main(TaskManager.scala:1546)
> at org.apache.flink.runtime.taskmanager.TaskManager.main(TaskManager.scala)
>
> "VM Thread" os_prio=31 tid=0x00007f9c9a108800 nid=0x4d03 runnable
>
> "Gang worker#0 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9b003800 nid=0x2503 runnable
>
> "Gang worker#1 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9b004000 nid=0x2703 runnable
>
> "Gang worker#2 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9a802000 nid=0x2903 runnable
>
> "Gang worker#3 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9b005000 nid=0x2b03 runnable
>
> "Gang worker#4 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9b005800 nid=0x2d03 runnable
>
> "Gang worker#5 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9b006000 nid=0x2f03 runnable
>
> "Gang worker#6 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9b006800 nid=0x3103 runnable
>
> "Gang worker#7 (Parallel GC Threads)" os_prio=31 tid=0x00007f9c9a802800 nid=0x3303 runnable
>
> "G1 Main Concurrent Mark GC Thread" os_prio=31 tid=0x00007f9c9b011000 nid=0x4703 runnable
>
> "Gang worker#0 (G1 Parallel Marking Threads)" os_prio=31 tid=0x00007f9c9a008000 nid=0x4903 runnable
>
> "Gang worker#1 (G1 Parallel Marking Threads)" os_prio=31 tid=0x00007f9c9b011800 nid=0x4b03 runnable
>
> "G1 Concurrent Refinement Thread#0" os_prio=31 tid=0x00007f9c9a808800 nid=0x4503 runnable
>
> "G1 Concurrent Refinement Thread#1" os_prio=31 tid=0x00007f9c9a808000 nid=0x4303 runnable
>
> "G1 Concurrent Refinement Thread#2" os_prio=31 tid=0x00007f9c9a807000 nid=0x4103 runnable
>
> "G1 Concurrent Refinement Thread#3" os_prio=31 tid=0x00007f9c9a806800 nid=0x3f03 runnable
>
> "G1 Concurrent Refinement Thread#4" os_prio=31 tid=0x00007f9c9a805800 nid=0x3d03 runnable
>
> "G1 Concurrent Refinement Thread#5" os_prio=31 tid=0x00007f9c9a805000 nid=0x3b03 runnable
>
> "G1 Concurrent Refinement Thread#6" os_prio=31 tid=0x00007f9c9a804000 nid=0x3903 runnable
>
> "G1 Concurrent Refinement Thread#7" os_prio=31 tid=0x00007f9c99811800 nid=0x3703 runnable
>
> "G1 Concurrent Refinement Thread#8" os_prio=31 tid=0x00007f9c9a803800 nid=0x3503 runnable
>
> "VM Periodic Task Thread" os_prio=31 tid=0x00007f9c9a115800 nid=0x6f03 waiting on condition
>
> JNI global references: 330
>
>
> Best Regards
> Andrey
>
>
>


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