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Posted to mapreduce-issues@hadoop.apache.org by "Amol Kekre (Commented) (JIRA)" <ji...@apache.org> on 2011/10/20 20:36:10 UTC
[jira] [Commented] (MAPREDUCE-3058) Sometimes task keeps on running
while its Syslog says that it is shutdown
[ https://issues.apache.org/jira/browse/MAPREDUCE-3058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13131883#comment-13131883 ]
Amol Kekre commented on MAPREDUCE-3058:
---------------------------------------
This is blocking gridmix, any eta?
> Sometimes task keeps on running while its Syslog says that it is shutdown
> -------------------------------------------------------------------------
>
> Key: MAPREDUCE-3058
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3058
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/gridmix, mrv2
> Affects Versions: 0.23.0
> Reporter: Karam Singh
> Assignee: Hitesh Shah
> Priority: Critical
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-3058-20110923.txt
>
>
> While running GridMixV3, one of the jobs got stuck for 15 hrs. After clicking on the Job-page, found one of its reduces to be stuck. Looking at syslog of the stuck reducer, found this:
> Task-logs' head:
> {code}
> 2011-09-19 17:57:22,002 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
> 2011-09-19 17:57:22,002 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: ReduceTask metrics system started
> {code}
> Task-logs' tail:
> {code}
> 2011-09-19 18:06:49,818 INFO org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException: Bad connect ack with firstBadLink as <DATANODE1>
> 2011-09-19 18:06:49,818 WARN org.apache.hadoop.hdfs.DFSClient: Error Recovery for block BP-1405370709-<NAMENODE>-1316452621953:blk_-7004355226367468317_79871 in pipeline <DATANODE2>, <DATANODE1>: bad datanode <DATANODE1>
> 2011-09-19 18:06:49,818 DEBUG org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtocol: lastAckedSeqno = 26870
> 2011-09-19 18:06:49,820 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <NAMENODE> from gridperf sending #454
> 2011-09-19 18:06:49,826 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <<NAMENODE> from gridperf got value #454
> 2011-09-19 18:06:49,827 DEBUG org.apache.hadoop.ipc.RPC: Call: getAdditionalDatanode 8
> 2011-09-19 18:06:49,827 DEBUG org.apache.hadoop.hdfs.DFSClient: Connecting to datanode <DATANODE2>
> 2011-09-19 18:06:49,827 DEBUG org.apache.hadoop.hdfs.DFSClient: Send buf size 131071
> 2011-09-19 18:06:49,833 WARN org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
> java.io.EOFException: Premature EOF: no length prefix available
> at org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:158)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:860)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:838)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:929)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:740)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:415)
> 2011-09-19 18:06:49,837 WARN org.apache.hadoop.mapred.YarnChild: Exception running child : java.io.EOFException: Premature EOF: no length prefix available
> at org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:158)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:860)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:838)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:929)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:740)
> at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:415)
> 2011-09-19 18:06:49,837 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <APPMASTER> from job_1316452677984_0862 sending #455
> 2011-09-19 18:06:49,839 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <APPMASTER> from job_1316452677984_0862 got value #455
> 2011-09-19 18:06:49,840 DEBUG org.apache.hadoop.ipc.RPC: Call: statusUpdate 3
> 2011-09-19 18:06:49,840 INFO org.apache.hadoop.mapred.Task: Runnning cleanup for the task
> 2011-09-19 18:06:49,840 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <NAMENODE> from gridperf sending #456
> 2011-09-19 18:06:49,858 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <NAMENODE> from gridperf got value #456
> 2011-09-19 18:06:49,858 DEBUG org.apache.hadoop.ipc.RPC: Call: delete 18
> 2011-09-19 18:06:49,858 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <APPMASTER> from job_1316452677984_0862 sending #457
> 2011-09-19 18:06:49,859 DEBUG org.apache.hadoop.ipc.Client: IPC Client (26613121) connection to <APPMASTER> from job_1316452677984_0862 got value #457
> 2011-09-19 18:06:49,859 DEBUG org.apache.hadoop.ipc.RPC: Call: reportDiagnosticInfo 1
> 2011-09-19 18:06:49,859 DEBUG org.apache.hadoop.metrics2.impl.MetricsSystemImpl: refCount=1
> 2011-09-19 18:06:49,859 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping ReduceTask metrics system...
> 2011-09-19 18:06:49,859 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping metrics source UgiMetrics
> 2011-09-19 18:06:49,859 DEBUG org.apache.hadoop.metrics2.impl.MetricsSystemImpl: class org.apache.hadoop.metrics2.lib.MetricsSourceBuilder$1
> 2011-09-19 18:06:49,860 DEBUG org.apache.hadoop.metrics2.util.MBeans: Unregistering Hadoop:service=ReduceTask,name=UgiMetrics
> 2011-09-19 18:06:49,860 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping metrics source JvmMetrics
> 2011-09-19 18:06:49,860 DEBUG org.apache.hadoop.metrics2.impl.MetricsSystemImpl: class org.apache.hadoop.metrics2.source.JvmMetrics
> 2011-09-19 18:06:49,860 DEBUG org.apache.hadoop.metrics2.util.MBeans: Unregistering Hadoop:service=ReduceTask,name=JvmMetrics
> 2011-09-19 18:06:49,860 DEBUG org.apache.hadoop.metrics2.util.MBeans: Unregistering Hadoop:service=ReduceTask,name=MetricsSystem,sub=Stats
> 2011-09-19 18:06:49,860 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: ReduceTask metrics system stopped.
> 2011-09-19 18:06:49,860 DEBUG org.apache.hadoop.metrics2.util.MBeans: Unregistering Hadoop:service=ReduceTask,name=MetricsSystem,sub=Control
> 2011-09-19 18:06:49,860 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: ReduceTask metrics system shutdown complete.
> {code}
> Which means that tasks is supposed to have stopped within 20 secs, whereas the process itself is stuck for more than 15 hours. From AM log, also found that this task was sending its update regularly. ps -ef | grep java was also showing that process is still alive.
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