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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1380) We should have a util.Subprocess class with utilities for starting subprocesses
Date Thu, 29 May 2008 16:23:45 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley updated HADOOP-1380:
----------------------------------

    Status: Open  (was: Patch Available)

Brice,
   Thanks for taking this on! It should probably include a call to it from streaming and/or
pipes so that we aren't adding uncalled code.

The SubProcessManager looks like a singleton, but the get method returns a new instance each
time. Shouldn't it cache it in a static variable?

In general, InterruptedExceptions should end the thread. Otherwise it is impossible to tell
them to stop. 

> We should have a util.Subprocess class with utilities for starting subprocesses
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-1380
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1380
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: util
>            Reporter: Owen O'Malley
>            Assignee: Brice Arnould
>         Attachments: SubProcessesManager.patch
>
>
> I'd like a utility class for launching subprocesses. In particular, I want there to be
a list of launched subprocesses and when the jvm is shutdown, a hook will destroy all of the
subprocesses. Otherwise, when a task is killed, the subprocesses continue on.

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