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From "Till Rohrmann (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1432) CombineTaskTest.testCancelCombineTaskSorting sometimes fails
Date Tue, 10 Feb 2015 09:35:35 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14313897#comment-14313897
] 

Till Rohrmann commented on FLINK-1432:
--------------------------------------

Had another occurrence. 

> CombineTaskTest.testCancelCombineTaskSorting sometimes fails
> ------------------------------------------------------------
>
>                 Key: FLINK-1432
>                 URL: https://issues.apache.org/jira/browse/FLINK-1432
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Robert Metzger
>
> We have a bunch of tests which fail only in rare cases on travis.
> https://s3.amazonaws.com/archive.travis-ci.org/jobs/47783455/log.txt
> {code}
> Exception in thread "Thread-17" java.lang.AssertionError: Canceling task failed: java.util.ConcurrentModificationException
> 	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
> 	at java.util.ArrayList$Itr.next(ArrayList.java:831)
> 	at org.apache.flink.runtime.memorymanager.DefaultMemoryManager.release(DefaultMemoryManager.java:290)
> 	at org.apache.flink.runtime.operators.GroupReduceCombineDriver.cancel(GroupReduceCombineDriver.java:221)
> 	at org.apache.flink.runtime.operators.testutils.DriverTestBase.cancel(DriverTestBase.java:272)
> 	at org.apache.flink.runtime.operators.testutils.TaskCancelThread.run(TaskCancelThread.java:60)
> 	at org.junit.Assert.fail(Assert.java:88)
> 	at org.apache.flink.runtime.operators.testutils.TaskCancelThread.run(TaskCancelThread.java:68)
> java.lang.NullPointerException
> 	at org.apache.flink.runtime.memorymanager.DefaultMemoryManager.release(DefaultMemoryManager.java:291)
> 	at org.apache.flink.runtime.operators.GroupReduceCombineDriver.cleanup(GroupReduceCombineDriver.java:213)
> 	at org.apache.flink.runtime.operators.testutils.DriverTestBase.testDriverInternal(DriverTestBase.java:245)
> 	at org.apache.flink.runtime.operators.testutils.DriverTestBase.testDriver(DriverTestBase.java:175)
> 	at org.apache.flink.runtime.operators.CombineTaskTest$1.run(CombineTaskTest.java:143)
> Tests run: 6, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 2.172 sec <<<
FAILURE! - in org.apache.flink.runtime.operators.CombineTaskTest
> testCancelCombineTaskSorting[0](org.apache.flink.runtime.operators.CombineTaskTest) 
Time elapsed: 1.023 sec  <<< FAILURE!
> java.lang.AssertionError: Exception was thrown despite proper canceling.
> 	at org.junit.Assert.fail(Assert.java:88)
> 	at org.junit.Assert.assertTrue(Assert.java:41)
> 	at org.apache.flink.runtime.operators.CombineTaskTest.testCancelCombineTaskSorting(CombineTaskTest.java:162)
> {code}



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