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https://issues.apache.org/jira/browse/HDFS-10742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15433987#comment-15433987
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Chen Liang commented on HDFS-10742:
-----------------------------------
Thanks for the catch [~chris.douglas]! Updated a patch that addresses most of
the issues. (Changing to slf4j logger is a bit tricky as I'm directly using the
log from FsDatasetImpl here).
Regarding you note, the intentions of {{AutoCloseable}} was mainly to allow
easy instrumentation such as the instrumented lock in this JIRA. I'm actually
not quit familiar with the static analysis tools as you mentioned. Anything to
add [~arpitagarwal]?
> Measurement of lock held time in FsDatasetImpl
> ----------------------------------------------
>
> Key: HDFS-10742
> URL: https://issues.apache.org/jira/browse/HDFS-10742
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 3.0.0-alpha2
> Reporter: Chen Liang
> Assignee: Chen Liang
> Attachments: HDFS-10742.001.patch, HDFS-10742.002.patch,
> HDFS-10742.003.patch, HDFS-10742.004.patch
>
>
> This JIRA proposes to measure the time the of lock of {{FsDatasetImpl}} is
> held by a thread. Doing so will allow us to measure lock statistics.
> This can be done by extending the {{AutoCloseableLock}} lock object in
> {{FsDatasetImpl}}. In the future we can also consider replacing the lock with
> a read-write lock.
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