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From "Xiao Kang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6768) RPC client can response more efficiently when sendParam() got IOException
Date Mon, 17 May 2010 10:18:43 GMT
RPC client can response more efficiently when sendParam() got IOException
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                 Key: HADOOP-6768
                 URL: https://issues.apache.org/jira/browse/HADOOP-6768
             Project: Hadoop Common
          Issue Type: Improvement
          Components: ipc
    Affects Versions: 0.22.0
            Reporter: Xiao Kang
             Fix For: 0.22.0


Under current RPC client implementation, when Client.Connection.sendParam() encounters IOException
it just marks the exception and wait receiveResponse() thread to handle the exception. However,
receiveResponse() may block ipc.ping.interval on socket read(). 

This means that RPC client may wait ipc.ping.interval(typically 1 miniute) when exception
in sendParam().

It maybe not so reasonable in some situation. For example using "hadoop fs -put " a small
file, DFSClient.close() will interupt renewLease() thread and it may wait 1 minute.

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