What is the problem with oracle error 3114?

Oracle error 3114 is a problem where the Oracle client cannot communicate with the server. The solution is: 1. Check the network configuration and confirm that the network connection is normal; 2. Check the firewall settings to ensure that the client is allowed to access the server's port; 3. Check the status of the listener to make sure it is running and configured correctly; 4. Check the status of the database instance to make sure it is running; 5. Check the client's TNS configuration file to make sure the TNS name matches the list on the server; 6. , The parameters in the client configuration file are configured correctly.

The operating environment of this tutorial: Windows 10 system, Oracle version 19c, Dell g3 computer.

Oracle error 3114 is a communication problem. When the program tries to connect to the Oracle database instance, if the connection fails, error 3114 will appear.

Error 3114 means that the Oracle client cannot communicate with the server and cannot establish a valid network connection. This could be due to a number of reasons, including network failure, database server failure, or configuration issues, etc.

The following are some common problems and solutions that cause error 3114:

1. Network failure: First, make sure the network connection is normal. You can try to test whether the database server is accessible through the ping command. If you cannot ping successfully, you need to check the network configuration and confirm that the network connection is normal.

2. Firewall issues: Firewalls may also prevent the Oracle client from communicating with the server. Please check the firewall settings to ensure that the Oracle client is allowed to access the relevant ports of the server.

3. Oracle listener problem: If the listener is not configured correctly or the listener is not started, error 3114 will also be caused. Check the status of the listener to make sure it is running and configured correctly.

4. The database instance is unavailable: If the database instance crashes or is not started, the client will not be able to establish a connection with it. Check the status of the database instance to make sure it is running. If the instance does not start, you can try starting it through a startup script or command line.

5. TNS name resolution issues: Check the client's TNS configuration file to make sure the TNS names in it match the list on the server. If TNS name resolution is incorrect, clients cannot connect to the database instance correctly.

6. Client configuration issues: Ensure that the client's Oracle environment variables are set correctly, and the parameters in the client configuration files (such as sqlnet.ora and tnsnames.ora) are configured correctly.

If you still cannot solve the error 3114 problem after following the above steps, it is recommended to contact Oracle technical support, they can provide more detailed and professional solutions. Please provide relevant error logs and configuration files to help them diagnose and resolve the issue.

Summary

Error 3114 is a communication issue that may be due to network failure, firewall configuration, listener issue, database instance unavailability, TNS name resolution issue or client Caused by various reasons such as configuration issues. By stepping through these possibilities, you can resolve error 3114 and establish a normal Oracle database connection

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