Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Troubleshooting Guide

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### Log Levels

The Application Server has many log levels that can be set in the Administration GUI (`FINEST`, `FINER`, `FINE`, `CONFIG`, `INFO`, `WARNING`, `SEVERE`, `ALERT`, and `FATAL`). All messages are logged when the log level is set to `FINEST` and only serious error messages appear if the log level is set to `FATAL`.

Note that the more detailed log levels (`FINEST`, `FINER`, `FINE`) can generate high volumes of log information for certain events, which may make it appear at first glance that there is an error condition when in fact there is not.

All messages with a log level less than the default level of `INFO` (`FINEST`, `FINER`, `FINE`, and `CONFIG`) provide information related to debugging and must be specifically enabled. Instructions for doing this are contained in the Sun Java System Application Server Administrator's Guide.

In addition to the standard JDK log levels, the Application Server has added log levels designed to map more intuitively to the Application Server log file (`server.log`) and to tightly integrate with Solaris. The log levels `ALERT` and `FATAL` are specific to the Application Server and are not implemented in the JDK1.4 logging API.

Note –

For information on the event log mechanism used in the Microsoft Windows operating environment, refer to the Windows help system index using the keywords Event Logging. If you choose to send logs to the Windows `server.log` file, only messages with a log level of INFO, WARNING, SEVERE, ALERT, or FATAL are logged to the Windows Event Log.

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