How to Troubleshoot Time Zone Mismatch Errors in MySQL Connector?

MySQL Connector Error: Time Zone Mismatch

When attempting to connect to a MySQL database via the Java Connector, users may encounter an error stating that the "server time zone value 'Central European Time' is unrecognized." This issue arises when the MySQL server is configured to use a time zone that is not supported or is ambiguous.

To resolve this error, follow the below steps:

1. Verify MySQL Server Configuration: Ensure that the MySQL server is configured with a valid and specific time zone. The server configuration file (my.cnf) should contain the [mysqld] section with the timezone parameter set.
2. Update MySQL Connector Properties: Add the serverTimezone parameter to the MySQL connector URL when establishing a database connection. This parameter specifies the time zone to be used when interpreting dates and times. Replace "CEST" in the URL provided in the question with a valid time zone, such as "Europe/Amsterdam" or "UTC".
3. Use Legacy Datetime Code: Disable the usage of legacy datetime code in the MySQL connector by setting the useLegacyDatetimeCode parameter to false in the connection URL. This ensures that the connector uses the JDBC 4.2 API for datetime handling, which provides improved time zone support.
4. Escape Ampersand in XML Configuration: If the connection URL is specified in an XML configuration file, escape the ampersand character (&) using "&". This is necessary in XML to prevent the ampersand from being parsed as the start of an entity reference.

By following these steps, you can resolve the MySQL connector error related to the time zone mismatch and establish a successful connection to the database.

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