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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4679) Datanode prints tons of log messages: Waiting for threadgroup to exit, active theads is XX
Date Tue, 25 Nov 2008 19:01:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12650684#action_12650684
] 

Tsz Wo (Nicholas), SZE commented on HADOOP-4679:
------------------------------------------------

Could you also include the course e in the new DiskOutOfSpaceException in checkDiskError(...)?

> Datanode prints tons of log messages: Waiting for threadgroup to exit, active theads
is XX
> ------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-4679
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4679
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>         Attachments: diskError.patch, diskError1.patch
>
>
> When a data receiver thread sees a disk error, it immediately calls shutdown to shutdown
DataNode. But the shutdown method does not return before all data receiver threads exit, which
will never happen. Therefore the DataNode gets into a dead/live lock state, emitting tons
of log messages: Waiting for threadgroup to exit, active threads is XX.

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