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https://issues.apache.org/jira/browse/HDFS-16558?focusedWorklogId=761434&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-761434
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ASF GitHub Bot logged work on HDFS-16558:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Apr/22 10:05
Start Date: 24/Apr/22 10:05
Worklog Time Spent: 10m
Work Description: yuanboliu closed pull request #4230: HDFS-16558
Consider changing the lock of delegation token from write …
URL: https://github.com/apache/hadoop/pull/4230
Issue Time Tracking
-------------------
Worklog Id: (was: 761434)
Time Spent: 40m (was: 0.5h)
> 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: 40m
> 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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