[jira] [Created] (TEZ-2440) Sorter should check for indexCacheList.size() in flush()

["Rajesh Balamohan (JIRA)" <ji...@apache.org>]

Rajesh Balamohan created TEZ-2440:
-------------------------------------

             Summary: 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


{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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