I actually deleted my own message because I found a workaround and did not want to trouble you but you was fast too fast answering :)

The link to JDBC-435 seems to be bad.

Its pretty easy making a simple connection pooling with mechanism so that a connection is only used by one thread a time.

But my application is a desktop application with a single user. I'm sure that in a server environment a real pool mechanism us needed, such as c3p0.

BlockingQueue<Database> pool = new ArrayBlockingQueue<Database>(size);

//Borrow connection from any thread

Database db = pool.take();

try{

//Do you stuff with db

} finally {

//Return db to pool.

pool.offer(db);

}