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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-724) Pipeline close hangs if one of the datanode is not responsive.
Date Mon, 21 Dec 2009 23:50:18 GMT

     [ https://issues.apache.org/jira/browse/HDFS-724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang updated HDFS-724:
-------------------------------

       Resolution: Fixed
    Fix Version/s: 0.22.0
     Hadoop Flags: [Reviewed]
           Status: Resolved  (was: Patch Available)

I've committed this.

> 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, 0.22.0
>
>         Attachments: h724_20091021.patch, pipelineHeartbeat.patch, pipelineHeartbeat1.patch,
pipelineHeartbeat2.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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