Chengwei Wang created HDFS-16431:
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             Summary: Truncate CallerContext in client side
                 Key: HDFS-16431
                 URL: https://issues.apache.org/jira/browse/HDFS-16431
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: nn
            Reporter: Chengwei Wang
            Assignee: Chengwei Wang


The context of CallerContext would be truncated  when  it exceeds the maximum 
allowed length in server side. I think it's better to do check and truncate in 
client side to reduce the unnecessary overhead of network and memory for NN.



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