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https://issues.apache.org/jira/browse/HDFS-10924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15561465#comment-15561465
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Chris Douglas commented on HDFS-10924:
--------------------------------------
If this is being committed to common, the issue should be moved to the COMMON
project.
Sorry, I'd missed that this was moving code from HDFS-9668. I agree with
[~arpitagarwal]'s
[comment|https://issues.apache.org/jira/browse/HDFS-9668?focusedCommentId=15531447&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15531447]
on reducing the variety of lock instrumentation classes.
> Add a new instrumented read-write lock
> --------------------------------------
>
> Key: HDFS-10924
> URL: https://issues.apache.org/jira/browse/HDFS-10924
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Jingcheng Du
> Assignee: Jingcheng Du
> Attachments: HDFS-10924-2.patch, HDFS-10924-3.patch,
> HDFS-10924-4.patch, HDFS-10924.patch
>
>
> Add a new instrumented read-write lock in hadoop common, so that the
> HDFS-9668 can use this to improve the locking in FsDatasetImpl
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