Yuanbo Liu created HDFS-16558:
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Summary: 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
Attachments: image-2022-04-24-14-13-04-695.png,
image-2022-04-24-14-13-52-867.png
In a very busy authed cluster, renewing/caneling/gettingdelegation 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-2022-04-24-14-13-04-695.png|width=334,height=212!
!image-2022-04-24-14-13-52-867.png|width=324,height=173!
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