Oracle Listener Already Running: Troubleshooting PRCC-1014, PRCR-1004, PRCR-1079, CRS-5702

The MGMTLSNR resource is already running on the 'rac2' node. This can occur due to various reasons, such as improper shutdown, resource conflicts, or network issues.

Here are some troubleshooting steps for the following errors:

• PRCC-1014: MGMTLSNR was already running
• PRCR-1004: Resource ora.MGMTLSNR is already running
• PRCR-1079: Failed to start resource ora.MGMTLSNR
• CRS-5702: Resource 'ora.MGMTLSNR' is already running on 'rac2'

1. Verify Listener Status: Check if the listener is indeed running on 'rac2' using the following command:

lisnrctl status

2. Stop Listener: If the listener is running, stop it using the following command:

lisnrctl stop

3. Check for Conflicts: Examine the $ORACLE_HOME/log/listener/alert log file for any error messages related to the MGMTLSNR resource. Look for clues like conflicting port numbers or resource names.
4. Restart the Resource: Try restarting the MGMTLSNR resource using the following command:

srvctl start listener

5. Check Network Connectivity: Verify that the network connectivity between the nodes and the listener is functioning properly.
6. Review Cluster Configuration: If the issue persists, review the cluster configuration files for any errors or inconsistencies.

If none of these steps resolve the issue, consider contacting Oracle support for further assistance.