Duo Zhang created HBASE-18199:
---------------------------------

             Summary: Race in NettyRpcConnection may cause call stuck in 
BufferCallBeforeInitHandler forever
                 Key: HBASE-18199
                 URL: https://issues.apache.org/jira/browse/HBASE-18199
             Project: HBase
          Issue Type: Bug
          Components: IPC/RPC
    Affects Versions: 3.0.0, 1.4.0, 2.0.0-alpha-1
            Reporter: Duo Zhang
            Assignee: Duo Zhang
             Fix For: 3.0.0, 1.4.0, 2.0.0-alpha-2


Found this when implementing the POC of HDFS-9924.

The problem is that channel.writeAndFlush will find the first outbound handler 
before scheduling the actual write task into event loop, so it is possible that 
when we actually execute the write task, the first outbound handler has already 
been changed but the task still refers to the old handler which has already 
been removed.



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