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The TransactionServlet can be configured to cause each request to be wrapped in a transaction. By default, the TransactionServlet’s transAttribute property is set to supports, which means a new transaction is not created for each request. In most circumstances, the transAttribute property should remain set to supports. In all cases, the TransactionServlet checks to see if the request created a Transaction without ending it. If so, the servlet rolls back that Transaction and reports an error.
