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From "David Bowen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1562) Report Java VM metrics
Date Thu, 05 Jul 2007 21:40:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1562?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

David Bowen updated HADOOP-1562:

    Attachment: 1562_1.patch

Here's an updated patch with the following changes:

   1 Incorporates Devaraj's suggestion of tagging DFS and NameNode jvm metrics with the session
id, if there is one.
   2 Adds jvm metrics reporting to SecondaryNameNode.
   3 Adds event counting via a custom Log4J Appender.  This tracks the number of INFO, WARN,
ERROR and FATAL logging events, and reports those numbers along with the rest of the JVM metrics.

> Report Java VM metrics
> ----------------------
>                 Key: HADOOP-1562
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1562
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: metrics
>            Reporter: David Bowen
>            Assignee: David Bowen
>         Attachments: 1562.patch, 1562_1.patch
> It would be useful to have each Java process in Hadoop (JobTracker, TaskTracker, NameNode
and DataNode) report some Java VM metrics.  E.g. heap/non-heap memory used/committed, number
of garbage collections and percentage of time spent in GC, number of threads that are runnable/blocked/waiting/etc.

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