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https://issues.apache.org/jira/browse/YARN-6125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16405721#comment-16405721
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Leo Chen edited comment on YARN-6125 at 3/20/18 2:46 AM:
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Hi, Andras Piros, Do u know how to reproduce this scenario by test case:
RM send diagnostic messages more than 1M size to ZK, then so many jobs will be
hang at this moment, then ARM and SRM will switch sate all time.
was (Author: leo chen):
Hi, Andras Piros, Do u know how to reproduce this scenario by test case:
RM send diagnostic messages more than 1M size to ZK, then so many job will be
hang at this moment, then ARM and SRM will switch sate all time.
> 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: 2.9.0, 3.0.0-alpha4
>
> 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, YARN-6125.009.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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