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From "Zhijiang (Jira)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-18832) BoundedBlockingSubpartition does not work with StreamTask
Date Thu, 13 Aug 2020 07:40:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-18832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17176817#comment-17176817
] 

Zhijiang commented on FLINK-18832:
----------------------------------

[~pnowojski] Agree with you proposal. It would be nice to give some friendly message for the
current limitation. I would submit the PR for it.

> BoundedBlockingSubpartition does not work with StreamTask
> ---------------------------------------------------------
>
>                 Key: FLINK-18832
>                 URL: https://issues.apache.org/jira/browse/FLINK-18832
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Network, Runtime / Task
>    Affects Versions: 1.10.1, 1.12.0, 1.11.1
>            Reporter: Till Rohrmann
>            Assignee: Zhijiang
>            Priority: Major
>
> The {{BoundedBlockingSubpartition}} does not work with a {{StreamTask}} because the {{StreamTask}}
instantiates an {{OutputFlusher}} which concurrently accesses the {{BoundedBlockingSubpartition}}.
This concurrency can lead to a double closing of the underlying {{BufferConsumer}} which manifests
in this stack trace:
> {code}
> [9:15 PM] Caused by: org.apache.flink.shaded.netty4.io.netty.util.IllegalReferenceCountException:
refCnt: 0, increment: 1
> 	at org.apache.flink.shaded.netty4.io.netty.util.internal.ReferenceCountUpdater.retain0(ReferenceCountUpdater.java:123)
> 	at org.apache.flink.shaded.netty4.io.netty.util.internal.ReferenceCountUpdater.retain(ReferenceCountUpdater.java:110)
> 	at org.apache.flink.shaded.netty4.io.netty.buffer.AbstractReferenceCountedByteBuf.retain(AbstractReferenceCountedByteBuf.java:80)
> 	at org.apache.flink.runtime.io.network.buffer.NetworkBuffer.retainBuffer(NetworkBuffer.java:174)
> 	at org.apache.flink.runtime.io.network.buffer.NetworkBuffer.retainBuffer(NetworkBuffer.java:47)
> 	at org.apache.flink.runtime.io.network.buffer.ReadOnlySlicedNetworkBuffer.retainBuffer(ReadOnlySlicedNetworkBuffer.java:127)
> 	at org.apache.flink.runtime.io.network.buffer.ReadOnlySlicedNetworkBuffer.retainBuffer(ReadOnlySlicedNetworkBuffer.java:41)
> 	at org.apache.flink.runtime.io.network.buffer.BufferConsumer.build(BufferConsumer.java:108)
> 	at org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition.writeAndCloseBufferConsumer(BoundedBlockingSubpartition.java:156)
> 	at org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition.flushCurrentBuffer(BoundedBlockingSubpartition.java:144)
> 	at org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition.flush(BoundedBlockingSubpartition.java:135)
> 	at org.apache.flink.runtime.io.network.partition.ResultPartition.flushAll(ResultPartition.java:245)
> 	at org.apache.flink.runtime.io.network.api.writer.RecordWriter.flushAll(RecordWriter.java:183)
> 	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.flush(RecordWriterOutput.java:156)
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain.flushOutputs(OperatorChain.java:344)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.afterInvoke(StreamTask.java:602)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:544)
> 	at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721)
> 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546)
> 	at java.lang.Thread.run(Thread.java:748)
> {code}



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