created a new database COGSTD, but it's not registered on scan_listener, when connect, the error is: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor In the alert log, when the database started, I usually see the remote_listener and local_listener are set dynamically before database is mount, but on this problematic database, I only see local_listener are set, but not remote_listener ALTER SYSTEM SET local_listener=' (ADDRESS=(PROTOCOL=TCP)(HOST=xx.xx.xx.xx0)(PORT=1521))' SCOPE=MEMORY SID='COGSTD3'; Troubleshooting: 1. The service is registered with local listener: node1>lsnrctl status listener|grep COGSTD Service "COGSTD" has 1 instance(s). Instance "COGSTD1", status READY, has 1 handler(s) for this service... Similar output on node2 and node 3 with the local instnance name 2. The service is not registered with scan_listener: -bash-4.1>srvctl status scan_listener