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https://issues.apache.org/jira/browse/FLINK-23233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17378164#comment-17378164
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Stephan Ewen commented on FLINK-23233:
--------------------------------------
Thanks, [~gaoyunhaii] for debugging this. Your analysis of the cause is correct.
I commented on the Pull Request regarding the suggested solution.
Regarding the Bugfix Release criticality: This condition here can only happen
in conjunction with actual RPC loss, plus a very fast checkpoint interval. So
this bug should be super rare. The original RPC loss fix was already fixing a
rare issue, this here should be even rarer.
Of course we should fix it asap, but I would expect that this will be hard to
observe in practice, outside tests with very specific setups. So if this fix
takes a bit, we may not want to block other more critical fixes on this.
> OperatorEventSendingCheckpointITCase.testOperatorEventLostWithReaderFailure
> fails on azure
> ------------------------------------------------------------------------------------------
>
> Key: FLINK-23233
> URL: https://issues.apache.org/jira/browse/FLINK-23233
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing
> Affects Versions: 1.14.0, 1.12.3, 1.13.1
> Reporter: Xintong Song
> Assignee: Yun Gao
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.14.0, 1.12.5, 1.13.2
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=19857&view=logs&j=4d4a0d10-fca2-5507-8eed-c07f0bdf4887&t=c2734c79-73b6-521c-e85a-67c7ecae9107&l=9382
> {code}
> Jul 03 01:37:31 [ERROR] Tests run: 4, Failures: 1, Errors: 0, Skipped: 0,
> Time elapsed: 21.415 s <<< FAILURE! - in
> org.apache.flink.runtime.operators.coordination.OperatorEventSendingCheckpointITCase
> Jul 03 01:37:31 [ERROR]
> testOperatorEventLostWithReaderFailure(org.apache.flink.runtime.operators.coordination.OperatorEventSendingCheckpointITCase)
> Time elapsed: 3.623 s <<< FAILURE!
> Jul 03 01:37:31 java.lang.AssertionError: expected:<[1, 2, 3, 4, 5, 6, 7, 8,
> 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
> 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46,
> 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65,
> 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84,
> 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100]> but
> was:<[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
> 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
> 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58,
> 59, 60, 61, 62, 63, 64, 65, 66, 67]>
> Jul 03 01:37:31 at org.junit.Assert.fail(Assert.java:88)
> Jul 03 01:37:31 at org.junit.Assert.failNotEquals(Assert.java:834)
> Jul 03 01:37:31 at org.junit.Assert.assertEquals(Assert.java:118)
> Jul 03 01:37:31 at org.junit.Assert.assertEquals(Assert.java:144)
> Jul 03 01:37:31 at
> org.apache.flink.runtime.operators.coordination.OperatorEventSendingCheckpointITCase.runTest(OperatorEventSendingCheckpointITCase.java:254)
> Jul 03 01:37:31 at
> org.apache.flink.runtime.operators.coordination.OperatorEventSendingCheckpointITCase.testOperatorEventLostWithReaderFailure(OperatorEventSendingCheckpointITCase.java:143)
> Jul 03 01:37:31 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
> Jul 03 01:37:31 at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> Jul 03 01:37:31 at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> Jul 03 01:37:31 at java.lang.reflect.Method.invoke(Method.java:498)
> Jul 03 01:37:31 at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> Jul 03 01:37:31 at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> Jul 03 01:37:31 at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> Jul 03 01:37:31 at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> Jul 03 01:37:31 at
> org.apache.flink.util.TestNameProvider$1.evaluate(TestNameProvider.java:45)
> Jul 03 01:37:31 at
> org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
> Jul 03 01:37:31 at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> Jul 03 01:37:31 at
> org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> Jul 03 01:37:31 at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> Jul 03 01:37:31 at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> {code}
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