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https://issues.apache.org/jira/browse/HADOOP-12325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14700356#comment-14700356
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Anu Engineer commented on HADOOP-12325:
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None of the test failures seems to be related to this patch. I have verified
the failed RPC test does execute properly with this patch applied.
> RPC Metrics : Add the ability track and log slow RPCs
> -----------------------------------------------------
>
> Key: HADOOP-12325
> URL: https://issues.apache.org/jira/browse/HADOOP-12325
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc, metrics
> Affects Versions: 2.7.1
> Reporter: Anu Engineer
> Assignee: Anu Engineer
> Attachments: HADOOP-12325.001.patch
>
>
> This JIRA proposes to add a counter called RpcSlowCalls and also a
> configuration setting that allows users to log really slow RPCs. Slow RPCs
> are RPCs that fall at 99th percentile. This is useful to troubleshoot why
> certain services like name node freezes under heavy load.
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