ServiceInvoker.deliverSync and message redelivery

[year1997]

Hi,

A client is calling ServiceInvoker.deliverSync to transfer a message to ESB. Since the ESB service includes some JDBCs and email function, the service will take several seconds to reply to client.

However, the deliverSync always resend the same request to ESB (but different JMS msg ID) within 1 second. As a result, the ESB server will get 5-6 duplicate requests.

18:46:21,306 INFO [ServiceInvoker] Unresponsive EPR: InVMEpr [ PortReference < <wsa:Address invm://4f41576f726b666c6f77242424242424242424242424436f7265/false?false#10000/>, <wsa:ReferenceProperties jbossesb:passByValue : false/> > ] for message: header: [ ]

Any idea?
Can I just turn off the resend mechanism so that let the timeout occurs?
I am using ESB 4.5 now.


Thank you.
Eddie

[scottdawson]

The second parameter for deliverSync is a timeout value in milliseconds. What value are you passing?

See the javadoc for more info: http://www.jboss.org/jbossesb/docs/4.5.GA/javadoc/esb/org/jboss/soa/esb/client/ServiceInvoker.html

Regards,
Scott

[year1997]

I am passing 5000L.

invoker.deliverSync(coreMsg, 2000L);

To my understanding, the second parameter is used for tiggering MessageDeliverException if no reply is received.

Regards,
Eddie

[year1997]

Yeah, thank you. I got my problem solved.

The problem is caused by timeout setting.

The esb service is designed as:
Service 1 ->(5s timeout) Service 2 ->(2s timeout) Service 3

When timeout occurs in Service 2, Service 1 will get a exception from Service 2. Then, Service 1 will retry the request automatically.
So, duplicate requests will send from Service 1 to Service 2.

After I change it to
Service 1 ->(5s timeout) Service 2 ->(5s timeout) Service 3,
no more duplicate request in ESB.

However, a new problem will be raised in this design.
Let's say Service 3 commits while Service 2 is failed eventually.
How can I rollback the whole operation?

Thank you.