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From "Hitesh Shah (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-7722) Support a stop command in ShellCommandExecutor
Date Wed, 05 Oct 2011 21:26:29 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7722?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hitesh Shah updated HADOOP-7722:
--------------------------------

    Attachment: HADOOP-7722.1.patch

Added a stop function that allows someone to stop the execution of the shell mid-way. 
                
> Support a stop command in ShellCommandExecutor 
> -----------------------------------------------
>
>                 Key: HADOOP-7722
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7722
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.23.0
>            Reporter: Hitesh Shah
>            Priority: Minor
>             Fix For: 0.23.0
>
>         Attachments: HADOOP-7722.1.patch
>
>
> Add a stop function call to Shell so as to either stop the process from getting started
if not already done so or destroy the process if it already has started. 
> Context of usage: 
> There can be race conditions when trying to kill an execution as the shell::execute call
is blocking and using the getProcess call is not a  feasible option as there can be a delay
between the execute call and when the process object is actually created ( after which it
can be used to kill the running sub-process ). 

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