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From "stack (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5079) DistributedLogSplitter interrupt can be hazardous to regionserver health
Date Tue, 20 Dec 2011 22:57:30 GMT
DistributedLogSplitter interrupt can be hazardous to regionserver health
------------------------------------------------------------------------

                 Key: HBASE-5079
                 URL: https://issues.apache.org/jira/browse/HBASE-5079
             Project: HBase
          Issue Type: Bug
            Reporter: stack


The DLS interrupt can kill the regionserver if happens while conversation w/ namenode is going
on.

The interrupt is used to end a task on regionserver when done whether successful or to interrupt
an ongoing split since assumed by another server.

I saw this issue testing because I was killing servers.  I also was suffering "HBASE-5078
DistributedLogSplitter failing to split file because it has edits for lots of regions" which
made it more likely to happen.

Here is what it looks like on the regionserver that died:

{code}
2011-12-20 17:54:58,009 INFO org.apache.hadoop.hbase.regionserver.SplitLogWorker: task /hbase/splitlog/hdfs%3A%2F%2Fsv4r11s38%3A7000%2Fhbase%2F.logs%2Fsv4r31s44%2C7003%2C1324365396770-splitting%2Fsv4r31s44%252C7003%252C1324365396770.1324403495463
preempted from sv4r13s38,7003,1324365396583, current task state and owner=owned sv4r27s44,7003,1324365396664
2011-12-20 17:54:58,009 INFO org.apache.hadoop.hbase.regionserver.SplitLogWorker: Sending
interrupt to stop the worker thread
2011-12-20 17:54:59,133 INFO org.apache.hadoop.hbase.regionserver.SplitLogWorker: task /hbase/splitlog/hdfs%3A%2F%2Fsv4r11s38%3A7000%2Fhbase%2F.logs%2Fsv4r31s44%2C7003%2C1324365396770-splitting%2Fsv4r31s44%252C7003%252C1324365396770.1324403495463
preempted from sv4r13s38,7003,1324365396583, current task state and owner=owned sv4r27s44,7003,1324365396664
2011-12-20 17:54:59,134 INFO org.apache.hadoop.hbase.regionserver.SplitLogWorker: Sending
interrupt to stop the worker thread
...
2011-12-20 17:55:25,505 INFO org.apache.hadoop.hbase.regionserver.SplitLogWorker: task /hbase/splitlog/hdfs%3A%2F%2Fsv4r11s38%3A7000%2Fhbase%2F.logs%2Fsv4r31s44%2C7003%2C1324365396770-splitting%2Fsv4r31s44%252C7003%252C1324365396770.1324403495463
preempted from sv4r13s38,7003,1324365396583, current task state and owner=unassigned sv4r11s38,7001,1324365395047
2011-12-20 17:55:25,505 INFO org.apache.hadoop.hbase.regionserver.SplitLogWorker: Sending
interrupt to stop the worker thread
{code}

Three interrupts are sent over period of 31 seconds or so.

Eventually the interrupt has an effect and I get:

{code}
2011-12-20 17:55:25,505 INFO org.apache.hadoop.hbase.regionserver.SplitLogWorker: Sending
interrupt to stop the worker thread
2011-12-20 17:55:48,022 DEBUG org.apache.hadoop.hbase.regionserver.LogRoller: HLog roll requested
2011-12-20 17:55:58,070 WARN org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception: java.io.IOException:
Call to sv4r11s38/10.4.11.38:7000 failed on local exception: java.nio.channels.ClosedByInterruptException
        at org.apache.hadoop.ipc.Client.wrapException(Client.java:1103)
        at org.apache.hadoop.ipc.Client.call(Client.java:1071)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
        at $Proxy9.addBlock(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor37.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
        at $Proxy9.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3507)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3370)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2700(DFSClient.java:2586)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2826)
Caused by: java.nio.channels.ClosedByInterruptException
        at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184)
        at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:341)
        at org.apache.hadoop.net.SocketOutputStream$Writer.performIO(SocketOutputStream.java:55)
        at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142)
        at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:146)
        at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:107)
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
        at java.io.DataOutputStream.flush(DataOutputStream.java:106)
        at org.apache.hadoop.ipc.Client$Connection.sendParam(Client.java:779)
        at org.apache.hadoop.ipc.Client.call(Client.java:1047)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
        at $Proxy9.getFileInfo(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
        at $Proxy9.getFileInfo(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:875)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:513)
        at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:768)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.convertRegionEditsToTemp(HLogSplitter.java:1097)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.createWAP(HLogSplitter.java:1066)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.convertRegionEditsToTemp(HLogSplitter.java:1097)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.createWAP(HLogSplitter.java:1066)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFileToTemp(HLogSplitter.java:410)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFileToTemp(HLogSplitter.java:351)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker$1.exec(SplitLogWorker.java:113)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.grabTask(SplitLogWorker.java:266)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.taskLoop(SplitLogWorker.java:197)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.run(SplitLogWorker.java:165)
        at java.lang.Thread.run(Thread.java:662)
2011-12-20 17:55:58,070 WARN org.apache.hadoop.hbase.regionserver.wal.HLogSplitter: Could
not prepare temp staging area
java.io.IOException: Call to sv4r11s38/10.4.11.38:7000 failed on local exception: java.nio.channels.ClosedByInterruptException
        at org.apache.hadoop.ipc.Client.wrapException(Client.java:1103)
        at org.apache.hadoop.ipc.Client.call(Client.java:1071)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
        at $Proxy9.getFileInfo(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
        at $Proxy9.getFileInfo(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:875)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:513)
        at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:768)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.convertRegionEditsToTemp(HLogSplitter.java:1097)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.createWAP(HLogSplitter.java:1066)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFileToTemp(HLogSplitter.java:410)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFileToTemp(HLogSplitter.java:351)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker$1.exec(SplitLogWorker.java:113)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.grabTask(SplitLogWorker.java:266)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.taskLoop(SplitLogWorker.java:197)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.run(SplitLogWorker.java:165)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.nio.channels.ClosedByInterruptException
        at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184)
        at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:341)
        at org.apache.hadoop.net.SocketOutputStream$Writer.performIO(SocketOutputStream.java:55)
        at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142)
        at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:146)
        at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:107)
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
        at java.io.DataOutputStream.flush(DataOutputStream.java:106)
        at org.apache.hadoop.ipc.Client$Connection.sendParam(Client.java:779)
        at org.apache.hadoop.ipc.Client.call(Client.java:1047)
        ... 20 more
{code}

Now here is the wacky part.  Above we are trying to go to the namenode it looks like and the
interrupt is closing socket.  At same, time, I'm trying to flush and it fails with same stack
trace ... and because we failed a flush, regionserver goes down:

{code}
2011-12-20 17:55:58,071 WARN org.apache.hadoop.hdfs.DFSClient: Error Recovery for block blk_-6239131583587622790_187561
bad datanode[0] nodes == null
2011-12-20 17:55:58,073 WARN org.apache.hadoop.hdfs.DFSClient: Could not get block locations.
Source file "/hbase/TestTable/9f98e6764d322832c845b740336e5750/.tmp/0df1673c96274028bda24c9cb49e9c3e"
- Aborting...
2011-12-20 17:55:58,074 FATAL org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING
region server sv4r13s38,7003,1324365396583: Replay of HLog required. Forcing server shutdown
org.apache.hadoop.hbase.DroppedSnapshotException: region: TestTable,0134394898,1323822783216.9f98e6764d322832c845b740336e5750.
        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1276)
        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1160)
        at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:1102)
        at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:400)

        at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:374)
        at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:243)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: Call to sv4r11s38/10.4.11.38:7000 failed on local exception:
java.nio.channels.ClosedByInterruptException
        at org.apache.hadoop.ipc.Client.wrapException(Client.java:1103)
        at org.apache.hadoop.ipc.Client.call(Client.java:1071)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
        at $Proxy9.addBlock(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor37.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
        at $Proxy9.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3507)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3370)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2700(DFSClient.java:2586)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2826)
Caused by: java.nio.channels.ClosedByInterruptException
        at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184)
        at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:341)
        at org.apache.hadoop.net.SocketOutputStream$Writer.performIO(SocketOutputStream.java:55)
        at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142)
        at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:146)
        at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:107)
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
        at java.io.DataOutputStream.flush(DataOutputStream.java:106)
        at org.apache.hadoop.ipc.Client$Connection.sendParam(Client.java:779)
        at org.apache.hadoop.ipc.Client.call(Client.java:1047)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
        at $Proxy9.getFileInfo(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
        at $Proxy9.getFileInfo(Unknown Source)
...
{code}



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