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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-724) Pipeline close hangs if one of the datanode is not responsive.
Date Mon, 01 Nov 2010 05:15:24 GMT

    [ https://issues.apache.org/jira/browse/HDFS-724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926824#action_12926824
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dhruba borthakur commented on HDFS-724:
---------------------------------------

+1 for the append-0.20 patch, please check it into the 0.20-append branch.

> Pipeline close hangs if one of the datanode is not responsive.
> --------------------------------------------------------------
>
>                 Key: HDFS-724
>                 URL: https://issues.apache.org/jira/browse/HDFS-724
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node, hdfs client
>    Affects Versions: 0.21.0
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Hairong Kuang
>            Priority: Blocker
>             Fix For: 0.21.0
>
>         Attachments: h724_20091021.patch, pipelineHeartbeat.patch, pipelineHeartbeat1.patch,
pipelineHeartbeat2.patch, stuckWriteAppend20.patch
>
>
> In the new pipeline design, pipeline close is implemented by sending an additional empty
packet.  If one of the datanode does not response to this empty packet, the pipeline hangs.
 It seems that there is no timeout.

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