Log file types

The WebSphere Application Server generates following types of log files.

• Diagnostic Trace:The diagnostic trace configuration settings for a server process determines the initial trace state for a server process.



• Java Virtual Machine Process Logs:The JVM logs are created by redirecting the System.out and System.err stream of the JVM to independent log files. WAS Process writes formatted messages to the System.out stream. In addition custom application code can write to these streams using the print() and println()



• Process Logs:WebSPhere Application Server processes contains two output streams that are accessible to native code running in th eprocess. These streams are the stdout and stderr streams. Native code including java virtual machine might write data to these process stream.



• IBM Service Logs: The Service Log is also known as activity log.The IBM service log contains both the WebSphere Application Server messages that are written to the System.out stream and some special messages that contain extended service information that can be important when analyzing problems