java.lang.NullPointerException - at org.postgresql.Connection.ExecSQL(Connection.java:312)

>>>>>Hi!
>>>>>
>>>>>We are experiencing problems on a live application and are getting int=
ermittent errors. The stack trace is as follows. As the system is live, thi=
s is urgent.
>>>>>
>>>>>java.lang.NullPointerException
>>>>>      at org.postgresql.Connection.ExecSQL(Connection.java:312)
>>>>>      at org.postgresql.jdbc2.Connection.setAutoCommit(Connection.java=
:141)
>>>>>      at org.enhydra.jdbc.standard.StandardXADataSource.getFreeConnect=
ion(StandardXADataSource.java:392)
>>>>>      at org.enhydra.jdbc.standard.StandardXAConnection.getConnection(=
StandardXAConnection.java:124)
>>>>>      at org.enhydra.jdbc.pool.StandardPoolDataSource.getConnection(St=
andardPoolDataSource.java:186)
>>>>>      at org.enhydra.jdbc.pool.StandardPoolDataSource.getConnection(St=
andardPoolDataSource.java:152)
>>>>>      at com.mphasis.give.common.utilities.DatabaseUtil.getConnection(=
DatabaseUtil.java:46)
>>>>>      at com.mphasis.give.payment.CartDAO.addToCart(CartDAO.java:161)>=
>>>>

>>>>>We are using JOTM..............

Any help would be appreciated.

Regards,
Dhaval