Why is my database connection failing after migration?

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Why is my database connection failing after migration?

Asked on Sep 17, 2025

Answer

A database connection failure after migration typically occurs due to incorrect configuration settings, such as mismatched database credentials or incorrect server addresses. Ensuring that your connection parameters are updated to reflect the new environment is crucial.

Example Concept: After migrating a database, verify that the database host, username, password, and database name in your application's configuration file match the new server's settings. Also, ensure that the new server's firewall allows connections from your application server's IP address.

Additional Comment:

Check the database host address; it may have changed if the database server was moved.
Ensure the database user has the necessary permissions on the new server.
Verify that the database port is correctly configured and open for connections.
Review any application-specific configuration files for hardcoded paths or credentials.
Test the connection manually using command-line tools like `mysql` or `psql` to isolate the issue.

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