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7.6.2. Setting log4j Priorities

log4j categories support priorities for logging levels. This means that different areas of the agent can be configured for different log levels.

Note

Do not set the RHQ_AGENT_DEBUG environment variable if you are setting priorities in the log4j.xml file. The environment variable overrides this log4j.xml configuration.
To enable debug logging for a category, change the priority value to DEBUG:
  1. Open the agent log4j file: 
    # vim agentRoot/rhq-agent/conf/log4j.xml
    Copy to Clipboard Toggle word wrap
  2. Reset the priority element for the category. By default, the agent configuration has logging for both incoming and outgoing server-agent communication and for the base org.rhq class. Optionally, logging can be enabled for plug-in class loaders and JBoss remoting communication. 
       <!-- ================ -->
   <!-- Limit categories -->
   <!-- ================ -->

   <!-- RHQ -->
   <category name="org.rhq">
      <priority value="INFO"/>
   </category>

   <!-- RHQ outgoing command tracing  - set to TRACE to trace commands sent by the agent -->
   <category name="org.rhq.enterprise.communications.command.client.OutgoingCommandTrace">
      <priority value="NONE"/>
      <appender-ref ref="COMMANDTRACE"/>
   </category>
   ...
    Copy to Clipboard Toggle word wrap
  3. Restart the agent to load the new configuration.
The log4j file format is described more in the Apache log4j documentation.
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