posted 21 years ago
It seems pradeep that this is something related to the Isolation levels in your xml. What i feel is that u are using bean managed persistence and u have set the Transaction_Required as the isolation level and since there is no transaction started before u call methods on your bean, this exception is being thrown. Please verufy that my assumptions are right and if they are, please start a new UserTransaction before u start calling methods on the bean.
HTH