GSM-46557
VLD54: TNS alias in database connection string. Database: {0}, alias: {1}.
Cause
Database connection string stored either in catalog or (for sharding only) in broker configuration is represented as TNS alias. It is required that tnsnames.ora file in each GSM home and catalog ORACLE Home contain corresponding alias.
Action
Make sure that TNS alias is present in each forementione tnsnames.ora file; Otherwise change connection string in catalog by executing MODIFY DATABASE command.