Why Am I Getting \'ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long\' When Connecting to MySQL?

Handling "ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long" on MySQL Connection

This error arises when attempting to establish a connection to MySQL, typically caused by a discrepancy between the MySQL version and the mysql-connector.jar library. The error message indicates that a java.math.BigInteger instance cannot be cast to a java.lang.Long instance.

The issue stems from internal operations performed by the JDBC driver during connection initialization. The driver employs casting mechanisms, and in this case, it encounters a mismatch between the expected Long data type and the actual BigInteger value.

To resolve this issue, ensure that you are using an up-to-date version of the mysql-connector.jar library. Consider upgrading to MySQL Connector/J versions 5.1.47 or 8.0.12 if you are currently using an older version. By using a compatible version, the casting issue can be addressed, and you should be able to successfully establish a connection to MySQL.

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