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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-724) Pipeline close hangs if one of the datanode is not responsive.
Date Tue, 16 Nov 2010 08:31:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932380#action_12932380
] 

stack commented on HDFS-724:
----------------------------

+1 on the hbAckReply patch.  I ran the hbase tests and all that used fail now passes (with
hdfs-895 in place).

> 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, 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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