A messaging system that allows multiple consumers to attempt consuming the same message can make a Transactional Client (484) very inefficient. The client thinks it has a message, consumes it, spends effort processing the message, then tries to commit and cannot (because the message has already been consumed by a competitor). Frequently performing work just to roll it back hurts throughput, whereas the point of this solution is to increase throughput. Thus, the performance of competing transactional consumers should be measured carefully; it could vary significantly on different messaging
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