The concurrent requests are going to Error in R12.2.5 and cannot view the log files as well.
Cause: cleanup_node failed due to ORA-01427: single-row subquery returns more than one row
ORA-06512: at "APPS.FND_CP_FNDSM", line 91
ORA-06512: at line 1.
The SQL statement being executed at the time of the error was: begin fnd_cp_fndsm.mark_killed_fndsm(:nn); end; and was executed from the file &ERRFILE.
Routine AFPEIM encountered an error while starting concurrent manager STANDARD with library /test/app/fs2/EBSapps/appl/fnd/12.0.0/bin/FNDLIBR.
Check that your system has enough resources to start a concurrent manager process. Contact your system : 13-JUN-2017 22:28:18
Starting STANDARD Concurrent Manager : 13-JUN-2017 22:28:18
Could not initialize the Service Manager FNDSM_DOYSER_DEV. Verify that DOYSER has been registered for concurrent processing.
An error occured in client-side routine afpsmcsm for Service Manager FNDSM_DOYSER_DEV. The routine returned code 126.
Check for preceding errors and as well as the service manager log file for further details."
ORACLE error 1427 in cleanup_node
After clone the node is not cleaned up which has the old values.
1. Shutdown the apps node.
2. login to db node and run the following.
3. Run autoconfig in db tier.
4. Run autoconfig in the apps tier and start the services.
This should be fixed.