ORA-12631 Using Database Links With Oracle DBMS 19c On Windows Server 2019

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Introduction

As organizations continue to migrate to newer versions of Oracle Database, they often encounter various challenges and issues that require troubleshooting and resolution. In this article, we will discuss a specific issue related to Oracle Database 19c on Windows Server 2019, specifically the ORA-12631 error when using database links.

Background

We had a set of long-time Oracle 12c Database installations (multiple instances on separate VMs) on Windows Server. Over the past year, we transitioned to Oracle 19c on Windows Server 2019. During this migration process, we encountered several issues, including the ORA-12631 error when using database links.

Understanding ORA-12631

The ORA-12631 error is a common issue that occurs when attempting to use database links in Oracle Database 19c on Windows Server 2019. This error typically occurs when the database link is not properly configured or when there are issues with the network connection between the two databases.

Causes of ORA-12631

There are several possible causes of the ORA-12631 error, including:

  • Incorrect database link configuration: The database link may not be properly configured, leading to issues with the connection between the two databases.
  • Network connectivity issues: There may be issues with the network connection between the two databases, preventing the database link from functioning correctly.
  • Oracle Net Services configuration: The Oracle Net Services configuration may be incorrect, leading to issues with the database link.
  • Database link authentication: The database link may not be properly authenticated, leading to issues with the connection between the two databases.

Troubleshooting ORA-12631

To troubleshoot the ORA-12631 error, we can follow these steps:

  1. Verify database link configuration: Verify that the database link is properly configured and that the connection details are correct.
  2. Check network connectivity: Check the network connection between the two databases to ensure that it is functioning correctly.
  3. Verify Oracle Net Services configuration: Verify that the Oracle Net Services configuration is correct and that the database link is properly configured.
  4. Check database link authentication: Verify that the database link is properly authenticated and that the connection details are correct.

Resolving ORA-12631

To resolve the ORA-12631 error, we can follow these steps:

  1. Update database link configuration: Update the database link configuration to ensure that it is properly configured and that the connection details are correct.
  2. Resolve network connectivity issues: Resolve any network connectivity issues that may be preventing the database link from functioning correctly.
  3. Update Oracle Net Services configuration: Update the Oracle Net Services configuration to ensure that it is correct and that the database link is properly configured.
  4. Verify database link authentication: Verify that the database link is properly authenticated and that the connection details are correct.

Example Use Case

Here is an example use case for resolving the ORA-12631 error:

Suppose we have two databases, DB1 and DB2, and we want to create a database link between them. We can use the following SQL command to create the database link:

CREATE DATABASE LINK DB2_LINK CONNECT TO SCOTT IDENTIFIED BY TIGER USING 'DB2';

However, when we attempt to use the database link, we receive the ORA-12631 error. To resolve this issue, we can update the database link configuration to ensure that it is properly configured and that the connection details are correct.

Conclusion

In conclusion, the ORA-12631 error is a common issue that occurs when attempting to use database links in Oracle Database 19c on Windows Server 2019. By understanding the possible causes of this error and following the troubleshooting steps outlined in this article, we can resolve the issue and ensure that our database links are functioning correctly.

Additional Resources

For additional resources on resolving the ORA-12631 error, we recommend the following:

  • Oracle Documentation: The Oracle documentation provides detailed information on resolving the ORA-12631 error, including troubleshooting steps and configuration options.
  • Oracle Support: Oracle support provides additional resources and guidance on resolving the ORA-12631 error, including technical support and consulting services.
  • Online Communities: Online communities, such as the Oracle forums and Reddit, provide a platform for discussing and resolving the ORA-12631 error with other Oracle professionals.

Best Practices

To prevent the ORA-12631 error from occurring in the future, we recommend the following best practices:

  • Regularly update database link configuration: Regularly update the database link configuration to ensure that it is properly configured and that the connection details are correct.
  • Verify network connectivity: Verify that the network connection between the two databases is functioning correctly.
  • Verify Oracle Net Services configuration: Verify that the Oracle Net Services configuration is correct and that the database link is properly configured.
  • Verify database link authentication: Verify that the database link is properly authenticated and that the connection details are correct.

Q: What is the ORA-12631 error?

A: The ORA-12631 error is a common issue that occurs when attempting to use database links in Oracle Database 19c on Windows Server 2019. This error typically occurs when the database link is not properly configured or when there are issues with the network connection between the two databases.

Q: What are the possible causes of the ORA-12631 error?

A: There are several possible causes of the ORA-12631 error, including:

  • Incorrect database link configuration: The database link may not be properly configured, leading to issues with the connection between the two databases.
  • Network connectivity issues: There may be issues with the network connection between the two databases, preventing the database link from functioning correctly.
  • Oracle Net Services configuration: The Oracle Net Services configuration may be incorrect, leading to issues with the database link.
  • Database link authentication: The database link may not be properly authenticated, leading to issues with the connection between the two databases.

Q: How can I troubleshoot the ORA-12631 error?

A: To troubleshoot the ORA-12631 error, we can follow these steps:

  1. Verify database link configuration: Verify that the database link is properly configured and that the connection details are correct.
  2. Check network connectivity: Check the network connection between the two databases to ensure that it is functioning correctly.
  3. Verify Oracle Net Services configuration: Verify that the Oracle Net Services configuration is correct and that the database link is properly configured.
  4. Check database link authentication: Verify that the database link is properly authenticated and that the connection details are correct.

Q: How can I resolve the ORA-12631 error?

A: To resolve the ORA-12631 error, we can follow these steps:

  1. Update database link configuration: Update the database link configuration to ensure that it is properly configured and that the connection details are correct.
  2. Resolve network connectivity issues: Resolve any network connectivity issues that may be preventing the database link from functioning correctly.
  3. Update Oracle Net Services configuration: Update the Oracle Net Services configuration to ensure that it is correct and that the database link is properly configured.
  4. Verify database link authentication: Verify that the database link is properly authenticated and that the connection details are correct.

Q: What are some best practices for preventing the ORA-12631 error?

A: To prevent the ORA-12631 error from occurring in the future, we recommend the following best practices:

  • Regularly update database link configuration: Regularly update the database link configuration to ensure that it is properly configured and that the connection details are correct.
  • Verify network connectivity: Verify that the network connection between the two databases is functioning correctly.
  • Verify Oracle Net Services configuration: Verify that the Oracle Net Services configuration is correct and that the database link is properly configured.
  • Verify database link authentication: Verify that the database link is properly authenticated and that the connection details are correct.

Q: Where can I find additional resources for resolving the ORA-12631 error?

A: For additional resources on resolving the ORA-12631 error, we recommend the following:

  • Oracle Documentation: The Oracle documentation provides detailed information on resolving the ORA-12631 error, including troubleshooting steps and configuration options.
  • Oracle Support: Oracle support provides additional resources and guidance on resolving the ORA-12631 error, including technical support and consulting services.
  • Online Communities: Online communities, such as the Oracle forums and Reddit, provide a platform for discussing and resolving the ORA-12631 error with other Oracle professionals.

Q: Can I use database links with Oracle DBMS 19c on Windows Server 2019?

A: Yes, you can use database links with Oracle DBMS 19c on Windows Server 2019. However, you must ensure that the database link is properly configured and that the connection details are correct.

Q: How do I create a database link in Oracle DBMS 19c on Windows Server 2019?

A: To create a database link in Oracle DBMS 19c on Windows Server 2019, you can use the following SQL command:

CREATE DATABASE LINK DB2_LINK CONNECT TO SCOTT IDENTIFIED BY TIGER USING 'DB2';

However, you must ensure that the database link is properly configured and that the connection details are correct.

Q: Can I use database links with Oracle Net Services?

A: Yes, you can use database links with Oracle Net Services. However, you must ensure that the Oracle Net Services configuration is correct and that the database link is properly configured.

Q: How do I troubleshoot Oracle Net Services configuration issues?

A: To troubleshoot Oracle Net Services configuration issues, you can follow these steps:

  1. Verify Oracle Net Services configuration: Verify that the Oracle Net Services configuration is correct and that the database link is properly configured.
  2. Check network connectivity: Check the network connection between the two databases to ensure that it is functioning correctly.
  3. Verify database link authentication: Verify that the database link is properly authenticated and that the connection details are correct.

By following these steps and best practices, you can resolve the ORA-12631 error and ensure that your database links are functioning correctly.