Hi Kasi,
If you enable Class Loader viewer service, you can see graphically the classloader (and search for classes and see in what classloader are loaded) and then export to file. If you don't enable the service you only can see the classloader and file (jar) you can not search for classes.
Troubleshooting->Class Loader viewer-> Server-> Application
If you want to see in a log, you need to enable classloader traces (and see in trace.log)
com.ibm.ws.classloader.*=all
You can enable Vervose class loading in JVM settings and see how is your heap evolving in native_stderr.log and native_stdout.log
MustGather: Classloader problems for WebSphere Application Server
http://www-01.ibm.com/support/docview.wss?uid=swg21196187#show-hide Hope this helps,
Regards