Ahmed Hussein created HDFS-15718:
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Summary: Optimize hdfs token op writeLock
Key: HDFS-15718
URL: https://issues.apache.org/jira/browse/HDFS-15718
Project: Hadoop HDFS
Issue Type: Improvement
Components: hdfs, namenode
Reporter: Ahmed Hussein
Assignee: Ahmed Hussein
[~daryn] noticed that token operations are acquiring the fsn write lock. Like
lease renewal and token expiration, the read lock is sufficient because the
namesystem is not mutated.
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