[ 
https://issues.apache.org/jira/browse/OAK-11713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17950497#comment-17950497
 ] 

Manfred Baedke commented on OAK-11713:
--------------------------------------

So far, it happened only once.

> Flaky test: FailoverIPRangeIT fails occasionally
> ------------------------------------------------
>
>                 Key: OAK-11713
>                 URL: https://issues.apache.org/jira/browse/OAK-11713
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: segment-tar
>            Reporter: Manfred Baedke
>            Priority: Minor
>
> Seen on Ubuntu with Java 11:
> {code:java}
> org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT
> testFailoverCorrectListIPv6UseIPv6(org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT)
>   Time elapsed: 2.171 s  <<< FAILURE!
> java.lang.AssertionError: expected:<{ root = { ... } }> but was:<{ root : { } 
> }>
>       at org.junit.Assert.fail(Assert.java:89)
>       at org.junit.Assert.failNotEquals(Assert.java:835)
>       at org.junit.Assert.assertEquals(Assert.java:120)
>       at org.junit.Assert.assertEquals(Assert.java:146)
>       at 
> org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT.createTestWithConfig(FailoverIPRangeIT.java:183)
>       at 
> org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT.testFailoverCorrectListIPv6UseIPv6(FailoverIPRangeIT.java:140)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>       at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
>       at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>       at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
>       at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.RunRules.evaluate(RunRules.java:20)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
>       at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
>       at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
>       at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
>       at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
>       at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
>       at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
>       at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
>       at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
>       at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
> testFailoverCorrectListUseIPv6(org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT)
>   Time elapsed: 2.14 s  <<< FAILURE!
> java.lang.AssertionError: expected:<{ root = { ... } }> but was:<{ root : { } 
> }>
>       at org.junit.Assert.fail(Assert.java:89)
>       at org.junit.Assert.failNotEquals(Assert.java:835)
>       at org.junit.Assert.assertEquals(Assert.java:120)
>       at org.junit.Assert.assertEquals(Assert.java:146)
>       at 
> org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT.createTestWithConfig(FailoverIPRangeIT.java:183)
>       at 
> org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT.testFailoverCorrectListUseIPv6(FailoverIPRangeIT.java:133)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>       at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
>       at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>       at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
>       at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.RunRules.evaluate(RunRules.java:20)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
>       at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
>       at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
>       at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
>       at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
>       at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
>       at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
>       at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
>       at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
>       at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
> testFailoverLocalClientUseIPv6(org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT)
>   Time elapsed: 2.14 s  <<< FAILURE!
> java.lang.AssertionError: expected:<{ root = { ... } }> but was:<{ root : { } 
> }>
>       at org.junit.Assert.fail(Assert.java:89)
>       at org.junit.Assert.failNotEquals(Assert.java:835)
>       at org.junit.Assert.assertEquals(Assert.java:120)
>       at org.junit.Assert.assertEquals(Assert.java:146)
>       at 
> org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT.createTestWithConfig(FailoverIPRangeIT.java:183)
>       at 
> org.apache.jackrabbit.oak.segment.standby.FailoverIPRangeIT.testFailoverLocalClientUseIPv6(FailoverIPRangeIT.java:72)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>       at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
>       at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>       at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
>       at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.rules.RunRules.evaluate(RunRules.java:20)
>       at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
>       at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
>       at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
>       at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
>       at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
>       at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
>       at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
>       at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
>       at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
>       at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
>       at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
> {code}



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