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From "stack@archive.org (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-41) JAVA_OPTS for the TaskRunner Child
Date Sat, 18 Feb 2006 00:48:24 GMT
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: stack@archive.org
    Priority: Minor

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

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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