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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-1626) Spurious failure in MatchTask cancelling test
Date Mon, 02 Mar 2015 16:41:05 GMT
Stephan Ewen created FLINK-1626:
-----------------------------------

             Summary: Spurious failure in MatchTask cancelling test
                 Key: FLINK-1626
                 URL: https://issues.apache.org/jira/browse/FLINK-1626
             Project: Flink
          Issue Type: Bug
          Components: Local Runtime
    Affects Versions: 0.9
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 0.9


This is a problem in the test. Cancelling a task may actually throw an exception (especially
interrupted exceptions). The test can be modified to either only call cancel and not call
interrupt, or to tolerate exceptions that are followup exceptions of interrupted exceptions.
I would prepare a patch for the first approach.

The stack trace of the symptom is blow:
{code}
java.lang.RuntimeException: Hashtable closing was interrupted
	at org.apache.flink.runtime.operators.hash.MutableHashTable.close(MutableHashTable.java:652)
	at org.apache.flink.runtime.operators.hash.ReusingBuildFirstHashMatchIterator.close(ReusingBuildFirstHashMatchIterator.java:100)
	at org.apache.flink.runtime.operators.MatchDriver.cleanup(MatchDriver.java:179)
	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.MatchTaskTest$4.run(MatchTaskTest.java:783)
Tests run: 47, Failures: 2, Errors: 0, Skipped: 0, Time elapsed: 15.589 sec <<< FAILURE!
- in org.apache.flink.runtime.operators.MatchTaskTest
testCancelHashMatchTaskWhileBuildFirst[1](org.apache.flink.runtime.operators.MatchTaskTest)
 Time elapsed: 1.029 sec  <<< FAILURE!
java.lang.AssertionError: Test threw an exception even though it was properly canceled.
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.apache.flink.runtime.operators.MatchTaskTest.testCancelHashMatchTaskWhileBuildFirst(MatchTaskTest.java:802)
{code}




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