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https://issues.apache.org/jira/browse/TEZ-2440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14560324#comment-14560324
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Rajesh Balamohan commented on TEZ-2440:
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Thanks [~mitdesai]. Can you please rebase the patch for master branch?.
"indexCacheList.isEmpty()" might be an easier check?.
> Sorter should check for indexCacheList.size() in flush()
> --------------------------------------------------------
>
> Key: TEZ-2440
> URL: https://issues.apache.org/jira/browse/TEZ-2440
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Rajesh Balamohan
> Assignee: Mit Desai
> Attachments: TEZ-2440-1.patch
>
>
> {noformat}
> 015-05-11 20:28:20,225 INFO [main] task.TezTaskRunner: Shutdown requested...
> returning
> 2015-05-11 20:28:20,225 INFO [main] task.TezChild: Got a shouldDie
> notification via hearbeats. Shutting down
> 2015-05-11 20:28:20,231 INFO [TezChild] impl.PipelinedSorter: Thread
> interrupted, cleaned up stale data, sorter threads shutdown=true,
> terminated=false
> 2015-05-11 20:28:20,231 INFO [TezChild]
> runtime.LogicalIOProcessorRuntimeTask: Joining on EventRouter
> 2015-05-11 20:28:20,231 INFO [TezChild]
> runtime.LogicalIOProcessorRuntimeTask: Ignoring interrupt while waiting for
> the router thread to die
> 2015-05-11 20:28:20,232 INFO [TezChild] task.TezTaskRunner: Encounted an
> error while executing task: attempt_1429683757595_0875_1_07_000000_0
> java.lang.ArrayIndexOutOfBoundsException: -1
> at java.util.ArrayList.elementData(ArrayList.java:418)
> at java.util.ArrayList.get(ArrayList.java:431)
> at
> org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter.flush(PipelinedSorter.java:462)
> at
> org.apache.tez.runtime.library.output.OrderedPartitionedKVOutput.close(OrderedPartitionedKVOutput.java:183)
> at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.close(LogicalIOProcessorRuntimeTask.java:360)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:181)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:171)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:171)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:167)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> {noformat}
> When a DAG is killed in the middle, sometimes these exceptions are thrown
> (e.g q_17 in TPC-DS). Even though it is completely harmless, it would be
> better to fix it to avoid distraction when debugging
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