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https://issues.apache.org/jira/browse/HDFS-15242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17066962#comment-17066962
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Íñigo Goiri commented on HDFS-15242:
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HDFS-15075 is already merged.
I don't think there are conflicts between these two patches.
+1 on [^HDFS-15242.001.patch].
> Add metrics for operations hold lock times of FsDatasetImpl
> -----------------------------------------------------------
>
> Key: HDFS-15242
> URL: https://issues.apache.org/jira/browse/HDFS-15242
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Xiaoqiao He
> Assignee: Xiaoqiao He
> Priority: Major
> Attachments: HDFS-15242.001.patch
>
>
> Some operations of FsDatasetImpl need to hold Lock, and sometimes it costs
> long time to execute since it include IO operation in Lock. I propose to add
> metrics for this operations then it could be more convenient for monitor and
> dig bottleneck.
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