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https://issues.apache.org/jira/browse/FLINK-10715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16672748#comment-16672748
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ASF GitHub Bot commented on FLINK-10715:
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dawidwys commented on issue #6996: [FLINK-10715] Change reporter log level
URL: https://github.com/apache/flink/pull/6996#issuecomment-435304280
Thanks @igalshilman for the contribution, I am not sure if I understood this
change. Was it intended that in the default case nothing changed (we log the
same message on the same level), but we change it to debug level (if this level
is enabled) and print then only the message?
Was that intended, I would assume that in the debug cases we could actually
log more than in the standard ones. Also could you describe a bit more, e.g. as
a comment in the code why do we do it like this?
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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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