June 16, 2014

java.sql.SQLException: Protocol violation

Exception in thread "main" java.sql.SQLException: Protocol violation: [1]
                at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:502)
                at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:205)
                at oracle.jdbc.driver.T4C7Ocommoncall.doOLOGOFF(T4C7Ocommoncall.java:64)
                at oracle.jdbc.driver.T4CConnection.logoff(T4CConnection.java:576)
                at oracle.jdbc.driver.PhysicalConnection.close(PhysicalConnection.java:5222)
               at XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Connection con=createConnection();
Con.close();
Con.commit();
Con.close();

Here, commit() is invoked after the connection is closed, hence the above exception occurred.