Log levels

Levels control which events are processed by Java™ logging. WebSphere® Application Server controls the levels of all loggers in the system.

The level value is set from configuration data when the logger is created and can be changed at run time from the administrative console. If a level is not set in the configuration data, a level is obtained by proceeding up the hierarchy until a parent with a level value is found. You can also set a level for each handler to indicate which events are published to an output device. When you change the level for a logger in the administrative console, the change is propagated to the children of the logger.

Levels are cumulative; a logger can process logged objects at the level that is set for the logger, and at all levels above the set level.
Table 1. Valid log levels. For instructions on how to set logging levels, read about theConfiguring Java logging using the administrative console topic.
Level Content / Significance
Off No events are logged.
Fatal Task cannot continue and component cannot function.
Severe Task cannot continue, but component can still function
Warning Potential error or impending error
Audit Significant event affecting server state or resources
Info General information outlining overall task progress
Config Configuration change or status
Detail General information detailing subtask progress
Fine Trace information - General trace
Finer Trace information - Detailed trace + method entry / exit / return values
Finest Trace information - A more detailed trace - Includes all the detail that is needed to debug problems
All All events are logged. If you create custom levels, All includes your custom levels, and can provide a more detailed trace than Finest.
Note: Trace information, which includes events at the Fine, Finer and Finest levels, can be written only to the trace log. Therefore, if you do not enable diagnostic trace, setting the log detail level to Fine, Finer, or Finest does not effect the logged data.



Related concepts
Loggers
Log handlers
Log filters
Log formatters
Related tasks
Configuring Java logging using the administrative console
Related reference
Log level settings
Reference topic    

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Last updated: Oct 21, 2010 1:44:59 AM CDT
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