[HADOOP-6808] Document steps to enable {File|Ganglia}Context for kerberos metrics

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.20.2, 0.22.0
• Component/s: conf
• Assignee: Unassigned
• Reporter: Erik Steffl
• Created: 03/Jun/10 21:57
• Updated: 30/Jul/14 20:07
• Resolved: 30/Jul/14 20:07

Description

There was apatch adding kerberos metrics which included the following line in conf/hadoop-metrics.properties:

ugi.class=org.apache.hadoop.metrics.spi.NullContext

However to maintain consistency with dfs,jvm and mapred metrics and for documentation purpose we should include comments in the file to include steps to enable FileContext and GangliaContext as well. The following lines have to be included in conf/hadoop-metrics.properties:

1. Configuration of the "ugi" context for file
   #ugi.class=org.apache.hadoop.metrics.file.FileContext
   #ugi.period=10
   #ugi.fileName=/tmp/ugimetrics.log

1. Configuration of the "ugi" context for ganglia
2. ugi.class=org.apache.hadoop.metrics.ganglia.GangliaContext
3. ugi.period=10
4. ugi.servers=localhost:8649