While configuring 11g JVM Diagnostics, following patches were applied:
9901141 for OMS and
9930117 for Agent
After applying the patch, ad4j Manager was deployed. Manager deployment
was successful. Now on clicking JVM diagnostics->Setup->JVM Pools page, exception appears as given in image:
Issue is with cache here.
Solution: In this case
1. stop the OMS
2. mv user_projects/domains/GCDomain/servers/EMGC_OMS1/tmp user_projects/domains/GCDomain/servers/EMGC_OMS1/tmp_bkp
3. delete user_projects/domains/GCDomain/generated_classes/jsp_servlet/_e2e/_ad4j directory
4. start OMS
For multiple OMSs, repeat the process on each OMS. Clearing the cache would resolve the issue.