How to Troubleshoot ORA-12560: TNS: Protocol Adapter Error?-Mysql Tutorial-php.cn

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How to Troubleshoot ORA-12560: TNS: Protocol Adapter Error?

Linda Hamilton

Jan 14, 2025 pm 10:57 PM

How to Troubleshoot ORA-12560: TNS: Protocol Adapter Error?

ORA-12560: TNS: Protocol Adapter Error - A Troubleshooting Guide

The ORA-12560 error signifies a communication failure between your application and the Oracle database. This guide focuses on a specific scenario to help you resolve this issue.

Resolution Steps:

Confirm Oracle Service Operation:
- Access your Oracle database server's services (Start > Run > Services.msc).
- Locate the "OracleService " service (e.g., OracleServiceORCL) and ensure it's running. Start it if necessary.
Test Database Connection:
- Open a server command prompt.
- Execute the following command, replacing <tnsalias></tnsalias> with the appropriate entry from your tnsnames.ora file:
```
tnsping <tnsalias>
```
Network Configuration Verification:
- Confirm network communication between the database server and client.
- Review firewall rules and network connectivity.
- Verify the Oracle listener is using the correct port.
Socket Inspection:
- Examine your tnsnames.ora file for any incorrect or missing socket details.
- Ensure the database server is listening on the specified IP address and port.
Restart Client and Server:
- If the previous steps fail, restart both the client application and the database server.
Review Database Logs:
- Check the Oracle database logs (e.g., alert_SID.log) for further error messages providing clues to the problem's root cause.

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