How to Fix \"java.lang.ClassCastException: java.math.BigInteger Cannot Be Cast to java.lang.Long\" on MySQL Connections?

ClassCastException: java.math.BigInteger Cannot Be Cast to java.lang.Long on MySQL Connection

Background

When attempting to connect to a MySQL database, users may encounter the "java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long" error. This error indicates an issue with the casting of data types during the connection establishment process.

Cause

The error occurs when the MySQL JDBC driver attempts to cast a BigInteger object to a Long object. This is due to a version incompatibility between the MySQL version and the mysql-connector.jar library used.

Solution

To resolve this issue, upgrade to a newer version of MySQL Connector/J. Recommended versions include 5.1.47 or 8.0.12 if you are using an older version.

The upgraded version of MySQL Connector/J will ensure proper data casting and prevent the ClassCastException error from occurring.

Additional Notes

It's important to verify that both the MySQL server and the JDBC driver versions are compatible. If upgrading the connector jar does not resolve the issue, it may indicate that the MySQL server version is not supported by the driver. In this case, consider migrating to a supported MySQL version.

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