Tao Jie created HDFS-13411:

             Summary: Should log more information when FSNameSystem is locked 
for a long time
                 Key: HDFS-13411
                 URL: https://issues.apache.org/jira/browse/HDFS-13411
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 3.0.0, 2.8.2
            Reporter: Tao Jie
            Assignee: Tao Jie

Today when one RPC to namenode locks FSNameSystem for a long time, it would 
print the stacktrace to the namenode log. However all we know from this log is 
the operation name to the Namenode(such as create, delete). 

It should print more information about the rpc call(like caller name, caller 
ip, operation src), which blocks the namenode. So we can have a better tuning 
to the HDFS. 

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