mule - NullPayload for Database Query only when wrapped in a Transaction -

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i have flow returns nullpayload when wrapped in multi-transaction. when remove multi-transaction tag expected results. why that? here code snippet

<flow name="successful-flow" processingstrategy="synchronous">     <vm:inbound-endpoint exchange-pattern="request-response" path="order-process.in" doc:name="vm"/>     <ee:multi-transactional action="always_begin" doc:name="transactional" >         <foreach collection="#[message.payload]" doc:name="for each"         rootmessagevariablename="original">             <jms:outbound-endpoint queue="orders.queue"             connector-ref="jmsconnector" doc:name="jms - send order processing queue">             <jms:transaction action="join_if_possible"/>         </jms:outbound-endpoint>         </foreach>     <db:insert config-ref="order_db" doc:name="save orders" >         <db:parameterized-query><![cdata[insert orders(product_id,line_item_code,price,lst_updt_tmsp) values('xxt665,'tp',20.99,'09/09/2010')]]></db:parameterized-query>     </db:insert>     </ee:multi-transactional>     <response>         <db:select config-ref="order_db" doc:name="database" transactionalaction="always_join">             <db:parameterized-query><![cdata[select count(*) orders]]></db:parameterized-query>         </db:select>     </response>     <catch-exception-strategy doc:name="order processing exception">         <logger             message="error  during  flow - #[message] :: exception::= #  [exception.summarymessage]"             level="error" doc:name="logger" />     </catch-exception-strategy> </flow>

my bad, previous transaction not have finished , been committed. default transactionalaction select query join_if_possible means reading data before data inserted , committed. simple fix follows:

<response>     <db:select config-ref="order_db" doc:name="database" transactionalaction="not_supported">         <db:parameterized-query><![cdata[select count(*) orders]]></db:parameterized-query>     </db:select> </response>

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