Lars George created HBASE-16188:
-----------------------------------
Summary: 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
Priority: Minor
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}}.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
