Could anyone please tell me the reasons behind these hibernate exceptions and possible solution.

I am working on a maintenance of a web-based application which has been demonstrating slow performance. On a close look at the logs, the following error messages are seen:

[7/8/05 13:17:57:662 CDT] 15771a JDBCException W net.sf.hibernate.util.JDBCExceptionReporter SQL Error: -99999, SQLState: null [7/8/05 13:17:57:665 CDT] 15771a JDBCException E net.sf.hibernate.util.JDBCExceptionReporter java.sql.Connection.close() requested while a transaction is in progress on the connection.The transaction remains active, and the connection cannot be closed.
[7/8/05 13:17:57:667 CDT] 15771a JDBCException W net.sf.hibernate.util.JDBCExceptionReporter SQL Error: -99999, SQLState: null [7/8/05 13:17:57:668 CDT] 15771a JDBCException E net.sf.hibernate.util.JDBCExceptionReporter java.sql.Connection.close() requested while a transaction is in progress on the connection.The transaction remains active, and the connection cannot be closed.
[7/8/05 13:17:57:669 CDT] 15771a JDBCException E net.sf.hibernate.util.JDBCExceptionReporter Cannot close connection
[7/8/05 13:17:57:671 CDT] 15771a JDBCException E net.sf.hibernate.util.JDBCExceptionReporter TRAS0014I: The following exception was logged com.ibm.db2.jcc.a.SqlException: java.sql.Connection.close() requested while a transaction is in progress on the connection.The transaction remains active, and the connection cannot be closed. at com.ibm.db2.jcc.a.o.r(o.java:1260) at com.ibm.db2.jcc.a.o.u(o.java:1285) at com.ibm.db2.jcc.a.o.s(o.java:1270) at com.ibm.db2.jcc.a.o.close(o.java:1253) at net.sf.hibernate.connection.DriverManagerConnectionProvider.closeConnection

Thanks

-- Ravi