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Posted to common-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2008/11/18 20:53:44 UTC

[jira] Updated: (HADOOP-4679) Datanode prints tons of log messages: Waiting for threadgroup to exit, active theads is XX

     [ https://issues.apache.org/jira/browse/HADOOP-4679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hairong Kuang updated HADOOP-4679:
----------------------------------

    Component/s: dfs

> 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
>
> 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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