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Asked: 2026-05-11T12:24:27+00:00

I have a Java webapp using Hibernate and MySQL. If the site isn’t used

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I have a Java webapp using Hibernate and MySQL. If the site isn’t used for a few days, the MySQL connection goes stale, and I am met with the following exception:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Connection.close() has already been called. Invalid operation in this state.

From experience using raw JDBC it is possible to configure the connection to attempt to recover from errors or stale connections, but I don’t know how to do this using Hibernate. I am not explicitly calling close() anywhere (but I am betting Hibernate does somewhere deep down in its guts).

Does anybody know what I should do?

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1 Answer

  1. What connection pool are you using?

    The Hibernate suggestion is not to use the built-in pooling, but use the application server datasource or something like Commons DBCP or C3PO.

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