JSP error Request URI:/OA_HTML/RF.jsp java.lang.NoClassDefFoundError

ERROR

JSP Error:
Request URI:/OA_HTML/RF.jsp
Exception:
java.lang.NoClassDefFoundError

JSP Error:
Request URI:/OA_HTML/AppsLocalLogin.jsp
Exception:
java.lang.NoClassDefFoundError

The jserv.log and OACoreGroup..stderr (where is the number of the JVM) will show errors like:-

Exception in static block of jtf.cache.CacheManager. Stack trace is:
oracle.apps.jtf.base.resources.FrameworkException: IAS Cache initialization failed. The Distributed Caching System failed to initialize on port: 12346. The list of hosts in the distributed caching system is: hostA.domain.com . The port 12346 should be free on each host running the JVMs. The default port 12346 can be overridden using
-Doracle.apps.jtf.cache.IASCacheProvidercacheProvider.port=
at oracle.apps.jtf.cache.IASCacheProvider.init(IASCacheProvider.java:220)
at oracle.apps.jtf.cache.CacheManager.activateCache(CacheManager.java:1444)
at oracle.apps.jtf.cache.CacheManager.initCache(CacheManager.java:752)

java.lang.NoClassDefFoundError
at org.apache.jserv.JServServletManager.load_init(JServServletManager.java:765)
at org.apache.jserv.JServServletManager.loadServlet(JServServletManager.java:659

SOLUTION

Disable Java Caching Mechanism.

Comment out the following line in jserv.properties to disable Java Caching

### wrapper.bin.parameters=-DLONG_RUNNING_JVM=true