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https://issues.apache.org/jira/browse/HDFS-5167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13921142#comment-13921142
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Jing Zhao commented on HDFS-5167:
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+1 for the latest patch. I will commit it soon.
> Add metrics about the NameNode retry cache
> ------------------------------------------
>
> Key: HDFS-5167
> URL: https://issues.apache.org/jira/browse/HDFS-5167
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, namenode
> Affects Versions: 3.0.0, 2.3.0, 2.4.0
> Reporter: Jing Zhao
> Assignee: Tsuyoshi OZAWA
> Priority: Minor
> Attachments: HDFS-5167.1.patch, HDFS-5167.10.patch,
> HDFS-5167.11.patch, HDFS-5167.12.patch, HDFS-5167.2.patch, HDFS-5167.3.patch,
> HDFS-5167.4.patch, HDFS-5167.5.patch, HDFS-5167.6.patch, HDFS-5167.6.patch,
> HDFS-5167.7.patch, HDFS-5167.8.patch, HDFS-5167.9-2.patch, HDFS-5167.9.patch
>
>
> It will be helpful to have metrics in NameNode about the retry cache, such as
> the retry count etc.
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