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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-327) ToolBase calls System.exit
Date Tue, 11 Jul 2006 16:37:31 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-327?page=comments#action_12420348 ] 

Doug Cutting commented on HADOOP-327:
-------------------------------------

But at issue here is not a particular main(), but an interface for main()-like methods.  So
we cannot know which specific exceptions might be thrown.

> ToolBase calls System.exit
> --------------------------
>
>          Key: HADOOP-327
>          URL: http://issues.apache.org/jira/browse/HADOOP-327
>      Project: Hadoop
>         Type: Bug

>   Components: util
>     Versions: 0.4.0
>     Reporter: Owen O'Malley
>     Assignee: Hairong Kuang
>      Fix For: 0.5.0
>  Attachments: exit.patch
>
> The new ToolBase class calls System.exit when the main routine finishes. That will break
if the application uses threads that need to finish before the jvm exits. The normal semantics
is that the program doesn't finish execution until all of the non-daemon threads exit (including
the main one) and System.exit should never be called except for critical errors.

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