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https://issues.apache.org/jira/browse/YARN-4969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15613518#comment-15613518
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Jonathan Hung commented on YARN-4969:
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This patch looks OK to me, one very minor nit, in AbstractContainerAllocator
you can combine the strings in {noformat}"Reserved container " + "
application="{noformat}.
> Fix more loggings in CapacityScheduler
> --------------------------------------
>
> Key: YARN-4969
> URL: https://issues.apache.org/jira/browse/YARN-4969
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: capacity scheduler
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Labels: oct16-easy
> Attachments: YARN-4969.1.patch
>
>
> YARN-3966 did logging cleanup for Capacity Scheduler before, however,
> there're some loggings we need to improvement:
> Container allocation / complete / reservation / un-reserve messages for every
> hierarchy (app/leaf/parent-queue) should be printed at INFO level:
> I'm debugging one issue that root queue's resource usage could be negative,
> it is very hard to reproduce, so we cannot enable debug logging since RM
> start, size of log cannot be fit in a single disk.
> Existing CS prints INFO message when container cannot be allocated, such as
> re-reservation / node heartbeat, etc. we should avoid printing such message
> at INFO level.
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