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https://issues.apache.org/jira/browse/FLINK-10715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16672755#comment-16672755
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ASF GitHub Bot commented on FLINK-10715:
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zentol commented on issue #6996: [FLINK-10715] Change reporter log level
URL: https://github.com/apache/flink/pull/6996#issuecomment-435305641
I'm not really fond of this change since eventually (i.e. once we solved the
concurrency issues in all reporters) this change should be reverted again as we
can no longer assume this to be some "intermittent" failure.
@kl0u Effectively the purpose of this PR is to not log the word "Exception"
so that the E2E tests pass. Which imo we can achieve just as well with the
recently introduced switch to disable log checks.
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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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