We have an "cache" (javax.cache.Cache) implementation that is a wrapper of Hazelcast's IMap. We use a composite Object key.
We upgraded from version 3.12.5 to 5.1.1. When I deploy the system on a local Windows machine, all works well. But when I deploy the system into an Kubernetes environment, the map just "does not work". Values do not get persisted into the map (after a put operation). An Hazelcast cluster does get formed so it does not seem to be an auto discovery issue. I also have another K8S env in which it does work properly.
I enabled Hazelcast's diagnostic mode and it does not seem to show me anything useful. I do not get any error or warn messages from the com.hazelcast.* package. The same issue happened also when I tried version 4.x.
I am trying to explore ways which will help to the realise what is the issue here. Thank you.
Turns out it is a bug. Hazelcast recommends to use the value of 0 instead.