[ http://issues.apache.org/jira/browse/HADOOP-41?page=all ]
Doug Cutting resolved HADOOP-41:
--------------------------------
Fix Version: 0.1
Resolution: Fixed
I just committed this. Thanks, Michael!
> JAVA_OPTS for the TaskRunner Child
> ----------------------------------
>
> Key: HADOOP-41
> URL: http://issues.apache.org/jira/browse/HADOOP-41
> Project: Hadoop
> Type: Improvement
> Components: conf
> Reporter: [EMAIL PROTECTED]
> Priority: Minor
> Fix For: 0.1
> Attachments: TaskRunner_child_javaopts-v2.patch,
> TaskRunner_child_javaopts.patch
>
> Currently, its possible to set the java heap size the TaskRunner child runs
> in, but thats all thats configurable about the child process. Hereabouts,
> we've found it useful being able to specify other options for the child JVM,
> especially when debugging and monitoring long-lived processes.
> Examples of why its useful being able to set options are the child include:
> + Being able to set '-server' option or '-c64'.
> + Passing logging.properties to configure child logging.
> + Enable and capture to file verbose GC logging or start the SUN JVM JMX
> agent for the child process. Allows connecting with jconsole to watch
> long-lived children, their heap and thread usage, and when seemingly hung,
> take thread dumps.
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