[jira] Commented: (HADOOP-6768) RPC client can response more efficiently when sendParam() got IOException

["Lin Yang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-6768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12868499#action_12868499 ] 

Lin Yang commented on HADOOP-6768:
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又看见师兄提bug了...




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> RPC client can response more efficiently when sendParam() got IOException
> -------------------------------------------------------------------------
>
>                 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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