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?

Mary-Kate Olsen

Jan 15, 2025 am 06:41 AM

How to Troubleshoot ORA-12560: TNS:protocol adapter error?

Resolving the ORA-12560: TNS:protocol adapter error in Oracle

The "ORA-12560: TNS:protocol adapter error" is a frequent problem when connecting to an Oracle database. This error usually indicates a problem with the database service or the client's inability to connect to the server.

Resolution Steps

Here's how to troubleshoot and fix this error:

Ensure the Oracle Database Service is Running:
- Access the Windows Services console (Start > Run > Services.msc).
- Locate the "OracleService " service (e.g., OracleServiceORCL). If it's not running, right-click and select "Start".
Check Network Connectivity:
- Open a command prompt on your client machine.
- Use the tnsping command to test connectivity:
```
tnsping <tnsalias>
```
  Replace <tnsalias></tnsalias> with your TNS alias from the tnsnames.ora file. A successful tnsping confirms network connectivity; failure suggests issues with firewalls or listener configuration.

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