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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-724) Pipeline close hangs if one of the datanode is not responsive.
Date Sat, 03 Sep 2011 00:19:09 GMT

    [ https://issues.apache.org/jira/browse/HDFS-724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096496#comment-13096496
] 

Suresh Srinivas commented on HDFS-724:
--------------------------------------

My bad, I had not applied HDFS-1057 patch which is required for this patch. +1 for the patch.

> 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: 0.20-append, 0.21.0
>
>         Attachments: HDFS-724.20-security.1.patch, h724_20091021.patch, hbAckReply.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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