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https://issues.apache.org/jira/browse/FLINK-10715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16672758#comment-16672758
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ASF GitHub Bot commented on FLINK-10715:
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kl0u commented on issue #6996: [FLINK-10715] Change reporter log level
URL: https://github.com/apache/flink/pull/6996#issuecomment-435306788
@zentol I see. So essentially we do not solve the issue but we just
temporarily make the test pass until the real issue is resolved? In this case,
I would say we should create subtasks on the issue that explain what are the
steps taken.
If this gets merged, the JIRA will be closed and we also never see the issue
again because we "fixed it" in the test. This means that next time we see the
issue, it will be a user reporting it. Which is not good.
Also this will be misleading because if someone searches the JIRA, he/she
will think that the issue is resolved.
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> E2e tests fail with ConcurrentModificationException in MetricRegistryImpl
> -------------------------------------------------------------------------
>
> Key: FLINK-10715
> URL: https://issues.apache.org/jira/browse/FLINK-10715
> Project: Flink
> Issue Type: Bug
> Components: E2E Tests, Metrics
> Affects Versions: 1.7.0
> Reporter: Dawid Wysakowicz
> Assignee: Igal Shilman
> Priority: Blocker
> Labels: pull-request-available
>
> Couple of e2e tests that rely on metrics fail with exception:
> {code}
> 2018-10-29 11:40:32,781 WARN
> org.apache.flink.runtime.metrics.MetricRegistryImpl - Error while
> reporting metrics
> java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437)
> at java.util.HashMap$EntryIterator.next(HashMap.java:1471)
> at java.util.HashMap$EntryIterator.next(HashMap.java:1469)
> at
> org.apache.flink.metrics.slf4j.Slf4jReporter.report(Slf4jReporter.java:101)
> at
> org.apache.flink.runtime.metrics.MetricRegistryImpl$ReporterTask.run(MetricRegistryImpl.java:427)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> Tests that failed:
> * 'Resuming Externalized Checkpoint (file, sync, no parallelism change)
> end-to-end test
> * 'State TTL Heap backend end-to-end test'
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