About Zombies and Convoys...
This week was Load Testing week for our latest set of Interfaces. Incidentally, this was our first set of Interfaces which implemented Uniform Sequential Convoys in their Orchestrations. The implementation was more or less like my previous post . Meaning the convoys had a timeout mechanism, which lead the Orchestration to completion, if no new messages would arrive for a period of time. So far - so good. But under a realistic amount of load, we observed that almost 1 out of every 5-6 messages would fail to go through to the destination. The HAT would show the following: Completed with discarded messages Of course the 1/5 is a very subjective number, depending upon the actual convoy implementation in question. After some snooping around (mostly at Lee Graber’s blog ), I figured out that the source of the problem. But no amount of the aforementioned snooping yielded any easy and/or elegant solution to this little pickle. What happens is that the control might pass to the delay branch of