System.outstream to SystemOut.log and
System.errstream to SystemErr.log. The SystemOut.log and SystemErr.log are also known as JVM logs. The WebSphere Application Server writes to this log and you can write into this log from your application by using
These logs are created for every WebSphere Application Server process, such as deployment manager, node agent, nodes,.. You can find these logs in profiles/<profilename>/logs/<processname> folder.