[jira] [Created] (HDFS-7926) NameNode implementation of ClientProtocol.truncate(..) is not idempotent

[Tsz Wo Nicholas Sze (JIRA)]

Tsz Wo Nicholas Sze created HDFS-7926:
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             Summary: NameNode implementation of ClientProtocol.truncate(..) is 
not idempotent
                 Key: HDFS-7926
                 URL: https://issues.apache.org/jira/browse/HDFS-7926
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze


If dfsclient drops the first response of a truncate RPC call, the retry by 
retry cache will fail with "DFSClient ... is already the current lease holder". 
 The truncate RPC is annotated as @Idempotent in ClientProtocol but the 
NameNode implementation is not.



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