[ 
https://issues.apache.org/jira/browse/LUCENE-4459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469471#comment-13469471
 ] 

Michael McCandless commented on LUCENE-4459:
--------------------------------------------

Here's the exc when it fails:
{noformat}
[junit4:junit4] Suite: org.apache.lucene.util.TestWeakIdentityMap
[junit4:junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestWeakIdentityMap -Dtests.method=testConcurrentHashMap 
-Dtests.seed=3BF33FCBB5027789 -Dtests.slow=true -Dtests.locale=es_UY 
-Dtests.timezone=Europe/Volgograd -Dtests.file.encoding=ISO-8859-1
[junit4:junit4] FAILURE 1.26s J0 | TestWeakIdentityMap.testConcurrentHashMap <<<
[junit4:junit4]    > Throwable #1: java.lang.AssertionError: 
iteratorSize(0)>=newSize(1)
[junit4:junit4]    >    at 
__randomizedtesting.SeedInfo.seed([3BF33FCBB5027789:BA829794CBA28EFB]:0)
[junit4:junit4]    >    at org.junit.Assert.fail(Assert.java:93)
[junit4:junit4]    >    at org.junit.Assert.assertTrue(Assert.java:43)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestWeakIdentityMap.testConcurrentHashMap(TestWeakIdentityMap.java:234)
[junit4:junit4]    >    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
[junit4:junit4]    >    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[junit4:junit4]    >    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[junit4:junit4]    >    at java.lang.reflect.Method.invoke(Method.java:597)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1559)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner.access$600(RandomizedRunner.java:79)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:737)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:773)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:787)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:50)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleFieldCacheSanity$1.evaluate(TestRuleFieldCacheSanity.java:51)
[junit4:junit4]    >    at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.rules.SystemPropertiesInvariantRule$1.evaluate(SystemPropertiesInvariantRule.java:55)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:70)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:48)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:358)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:782)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:442)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:746)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner$3.evaluate(RandomizedRunner.java:648)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner$4.evaluate(RandomizedRunner.java:682)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:693)
[junit4:junit4]    >    at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:42)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.rules.SystemPropertiesInvariantRule$1.evaluate(SystemPropertiesInvariantRule.java:55)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:43)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:48)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:70)
[junit4:junit4]    >    at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:55)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
[junit4:junit4]    >    at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:358)
[junit4:junit4]    >    at java.lang.Thread.run(Thread.java:662)
[junit4:junit4]   2> NOTE: test params are: codec=Lucene3x, 
sim=RandomSimilarityProvider(queryNorm=false,coord=crazy): {}, locale=es_UY, 
timezone=Europe/Volgograd
[junit4:junit4]   2> NOTE: Windows Vista 6.0 x86/Sun Microsystems Inc. 1.6.0_23 
(32-bit)/cpus=4,threads=1,free=12923248,total=16318464
[junit4:junit4]   2> NOTE: All tests run in this JVM: [TestWeakIdentityMap]
[junit4:junit4] Completed on J0 in 1.92s, 2 tests, 1 failure <<< FAILURES!
{noformat}
                
> TestWeakIdentityMap.testConcurrentHashMap fails periodically in jenkins
> -----------------------------------------------------------------------
>
>                 Key: LUCENE-4459
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4459
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>
> There is either a bug, a test bug, or a jvm bug.
> I dont care which one it is, but lets fix the intermittent fail or disable 
> the test.

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