Hello folks, Working on IGNITE-4302 <https://issues.apache.org/jira/browse/IGNITE-4302> I developed a protocol for delivering metadata updates to all nodes in cluster.
This protocol relies on a guarantee of *DiscoveryCustomMessage* that each message is delivered to *CustomEventListener* exactly once; duplicates are not possible. But test *GridEventConsumeSelfTest::testMultithreadedWithNodeRestart* running with my latest code changes seems to fail exactly because of violation of this guarantee. I can see that acknowledge messages which are also DiscoveryCustomMessages make two passes across the cluster when some nodes are restarted. My question is: is it s bug or just a detail about guarantees around acknowledge messages? I can easily filter out these duplicates at the protocol level, but it is better to fix this in case it is a bug. Thanks, Sergey.
