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https://issues.apache.org/jira/browse/HBASE-16188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopi Krishnan Nambiar updated HBASE-16188:
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Status: Open (was: Patch Available)
> Add EventCounter information to log4j properties file
> -----------------------------------------------------
>
> Key: HBASE-16188
> URL: https://issues.apache.org/jira/browse/HBASE-16188
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 1.2.1
> Reporter: Lars George
> Assignee: Gopi Krishnan Nambiar
> Priority: Minor
> Labels: beginner
> Fix For: 2.0.0, 1.3.0
>
> Attachments: HBASE-16188-1.3.patch
>
>
> Hadoop's {{JvmMetrics}}, which HBase also is using in Metrics2 and provides
> it as an MBean, has the ability to count log4j log calls. This is tracked by
> a special {{Appender}} class, also provided by Hadoop, called
> {{EventCounter}}.
> We should add some info how to enable this (or maybe even enable it by
> default?).
> The appender needs to be added in two places, shown here:
> {noformat}
> hbase.root.logger=INFO,console
> ...
> # Define the root logger to the system property "hbase.root.logger".
> log4j.rootLogger=${hbase.root.logger}, EventCounter
> log4j.appender.EventCounter=org.apache.hadoop.log.metrics.EventCounter
> {noformat}
> We could simply add this commented out akin to the {{hbase-env.sh}}.
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