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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7926) NameNode implementation of ClientProtocol.truncate(..) is not idempotent
Date Fri, 13 Mar 2015 01:07:38 GMT
Tsz Wo Nicholas Sze created HDFS-7926:
-----------------------------------------

             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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