I face the following exception:
weblogic.transaction.internal.TimedOutException: Transaction timed out after 300 seconds
this is set within the Stateless Session EJB Bean as javax.transaction.UserTransaction jtaTransaction.setTransactionTimeout(300) but I cannot figure out, where in the application console to set this property.
After logging in, on the home page of the Server Console you should see 3 sections:
Under Services Configurations there is subsection Other Services. Click the JTA Configuration link under Other Services. The transaction timeout should be the top setting on the page displayed, labelled Timeout Seconds.