EBS R12.2 Adop Prepare Failure With Error ORA-12521

 

Cause
The issue is caused by TNS_ADMIN configuration files on Patch file system is not updated.
To implement the solution, please execute the following steps:
a. Please execute the following actions on the both nodes.
1. Source Patch File system env file
2. Backup all files under $TNS_ADMIN
3. Run adgentns.pl on Patch file system
perl $AD_TOP/bin/adgentns.pl contextfile=$CONTEXT_FILE appspass=
4. check the Confirm that DB connection is established from Patch file system.
b. rerun the adop phase=prepare