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