The RPC adapter uses the Jakarta Commons Logging facility. Jakarta Commons Logging provides a logging framework that can integrate other logging facilities such as log4j and java.util.logging. The logging configuration that you use depends on the application server you are deploying the RPC adapter to.
WebSphere® Application Server version 6.0.2.x, 6.1.x, and 7.0.0.x The RPC adapter integrates with the logging facility of the application server and supports ERROR level ,INFO level and TRACE level logging. Select the com.ibm.websphere.rpcadapter package under the Logging and Tracing panel. Select finest to enable TRACE level logging.
Other application servers IBM® WebSphere Application Server Community Edition uses the log4j logging package. Edit the server-log4j.properties file to add logging for the RPC adapter. Add the following entry:
log4j.category.com.ibm.websphere.rpcadapter=TRACE