Infinite loop when using maps instead collections.
The problem appears before the 10th iteration, however if you run it 10 times it could end properly without infinite loop.

We thought it could be linked to the concurrent access to HashMap and we tried with concurrent HashMap but still got the same problem.
It could be probably linked to the fact that we use maps not only to store the result of some rules evaluation but also as a functional way to prevent rule to be fired again (see rule "FLG1" and the condition "FLG1 not memberof matchMap"
Thanks.