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https://issues.apache.org/jira/browse/HDFS-16558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18037925#comment-18037925
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ASF GitHub Bot commented on HDFS-16558:
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github-actions[bot] closed pull request #4230: HDFS-16558 Consider changing the
lock of delegation token from write …
URL: https://github.com/apache/hadoop/pull/4230
> Consider changing the lock of delegation token from write lock to read lock
> ---------------------------------------------------------------------------
>
> Key: HDFS-16558
> URL: https://issues.apache.org/jira/browse/HDFS-16558
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Yuanbo Liu
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2022-04-24-14-13-04-695.png,
> image-2022-04-24-14-13-52-867.png, image-2022-04-24-14-57-18-740.png,
> image-2022-04-24-14-58-25-294.png
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> In a very busy authed cluster, renewing/caneling/getting delegation token get
> slow and it will slow down the speed of handling rpcs from client. Since
> AbstractDelegationTokenSecretManager is a thread-safe manager, we propose to
> change the fs lock from write lock to read lock(protect editlog rolling)
> !image-2022-04-24-14-58-25-294.png|width=318,height=194!
> !image-2022-04-24-14-13-52-867.png|width=324,height=173!
> !image-2022-04-24-14-57-18-740.png|width=303,height=184!
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