500 Internal Server Error

In R12, when attempting to log in to EBS using HTTP://HOST.DOMAIN:PORT/
,the following error occurs.

ERROR500 Internal Server Errorjava.lang.NoClassDefFoundError atoracle.apps.fnd.sso.AppsLoginRedirect.AppsSetting(AppsLoginRedirect.java:126) atoracle.apps.fnd.sso.AppsLoginRedirect.init(AppsLoginRedirect.java:170) at com.evermind[OracleContainers for J2EE 10g (10.1.3.0.0)

The issue is caused by the following setup: Incorrect set-up of the Distributed Caching, port:12377 is not available.

To implement the solution, please execute the following steps:

Solution 1:
1. You can disable the use of "Distributed JVM cache" by disabling LONG_RUNNING_JVM- set oc4j.properties: ==> LONG_RUNNING_JVM= to "false"

Note: not usually recommended

Solution 2:

1. Assign an available port for "Distributed JVM cache" by using the following steps
a) Set the correct port in your Context File -> parameter "s_java_object_cache_port"
2. Run Autoconfig on all Middle Tiers
3. Make sure your System Profile "JTF_DIST_CACHE_PORT" has the same port specified
4. Retest the issue.