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https://issues.apache.org/jira/browse/HDFS-10682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arpit Agarwal updated HDFS-10682:
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Description:
This Jira proposes to replace the FsDatasetImpl object lock with a separate
lock object. Doing so will allow us to measure lock statistics.
In the future we can also consider replacing the lock with a read-write lock.
was:Add a metric to measure the time the lock of FSDataSetImpl is held by a
thread. The goal is to expose this for users to identify operations that locks
dataset for long time ("long" in some sense) and be able to
understand/reason/track the operation based on logs.
> Replace FsDatasetImpl object lock with a separate lock object
> -------------------------------------------------------------
>
> Key: HDFS-10682
> URL: https://issues.apache.org/jira/browse/HDFS-10682
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Chen Liang
> Assignee: Chen Liang
> Attachments: HDFS-10682.001.patch, HDFS-10682.002.patch,
> HDFS-10682.003.patch, HDFS-10682.004.patch, HDFS-10682.005.patch,
> HDFS-10682.006.patch
>
>
> This Jira proposes to replace the FsDatasetImpl object lock with a separate
> lock object. Doing so will allow us to measure lock statistics.
> In the future we can also consider replacing the lock with a read-write lock.
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