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From sdonovan_uk <>
Subject AMQ-2489 not fixed, acknowledgement problem.
Date Thu, 08 Nov 2012 01:23:48 GMT
Active MQ V5.7.0
C++/CMS V3.4.5

I am using a queue
We have written a C++ consumer, using CLIENT_ACKNOWLEDGEMENT.

When receiving messages, if the prefetch value is either 1 or 2 -- you get
the exception "Could not correlate acknowledge with dispatched message", as
described in bug AMQ-1489.

If the prefetch value higher than 2 -- it works, and you don't get the

This is IMPORTANT -- because although the exception is a "warning" (and is
discussed as "unimportant") -- it CHRONICALLY affects performance, by
approximately one factor.


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