How to check the Database Connection leakage in Java EE application?

Log4jdbc a Java JDBC driver that can log SQL and/or JDBC calls for other JDBC drivers, has a logger which logs connection open and close events as well as dumping all open connection numbers. This is very useful for hunting down connection leak problems .

If you're using a Java EE app server, you should be able to configure it to check connections when they go out and reclaim stale connections when they don't come back.

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