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https://issues.apache.org/jira/browse/YARN-6125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864139#comment-15864139
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Andras Piros commented on YARN-6125:
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The unit test {{TestRMRestart#testFinishedAppRemovalAfterRMRestart}} is
unrelated. It passes locally when run separately but fails when run as part of
the whole unit test series {{TestRMRestart}}.
> The application attempt's diagnostic message should have a maximum size
> -----------------------------------------------------------------------
>
> Key: YARN-6125
> URL: https://issues.apache.org/jira/browse/YARN-6125
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Affects Versions: 2.7.0
> Reporter: Daniel Templeton
> Assignee: Andras Piros
> Priority: Critical
> Fix For: 3.0.0-alpha3
>
> Attachments: YARN-6125.000.patch, YARN-6125.001.patch,
> YARN-6125.002.patch, YARN-6125.003.patch, YARN-6125.004.patch,
> YARN-6125.005.patch, YARN-6125.006.patch, YARN-6125.007.patch,
> YARN-6125.008.patch
>
>
> We've found through experience that the diagnostic message can grow
> unbounded. I've seen attempts that have diagnostic messages over 1MB. Since
> the message is stored in the state store, it's a bad idea to allow the
> message to grow unbounded. Instead, there should be a property that sets a
> maximum size on the message.
> I suspect that some of the ZK state store issues we've seen in the past were
> due to the size of the diagnostic messages and not to the size of the
> classpath, as is the current prevailing opinion.
> An open question is how best to prune the message once it grows too large.
> Should we
> # truncate the tail,
> # truncate the head,
> # truncate the middle,
> # add another property to make the behavior selectable, or
> # none of the above?
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