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https://issues.apache.org/jira/browse/HADOOP-4969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660153#action_12660153
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Nigel Daley commented on HADOOP-4969:
-------------------------------------

And/or ensure (via code review) that Thread and Runnable classes catch and 
handle Throwable exceptions properly. 

> Threads in servers should not die silently.
> -------------------------------------------
>
>                 Key: HADOOP-4969
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4969
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs
>            Reporter: Tsz Wo (Nicholas), SZE
>
> If there is an uncaught exception, some threads in a server may die silently. 
> The corresponding error message does not show up in the log.

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