[jira] [Created] (HDFS-5665) Remove the unnecessary writeLock while initializing CacheManager in FsNameSystem Ctor

["Uma Maheswara Rao G (JIRA)" <ji...@apache.org>]

Uma Maheswara Rao G created HDFS-5665:
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             Summary: Remove the unnecessary writeLock while initializing CacheManager in FsNameSystem Ctor
                 Key: HDFS-5665
                 URL: https://issues.apache.org/jira/browse/HDFS-5665
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
    Affects Versions: 2.2.0, 3.0.0
            Reporter: Uma Maheswara Rao G
            Assignee: Uma Maheswara Rao G


I just saw the below piece of code in Fsnamesystem ctor.

{code}
 writeLock();
      try {
        this.cacheManager = new CacheManager(this, conf, blockManager);
      } finally {
        writeUnlock();
      }
{code}

It seems unnecessary to keep writeLock here. I am not sure if there is a clear reason to keep the lock.




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