Concurrency problems with enum constraints in MVEL -------------------------------------------------- Key: DROOLS-1717 URL: https://issues.jboss.org/browse/DROOLS-1717 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 7.2.0.Final Reporter: Tibor Zimányi Assignee: Mario Fusco Labels: concurrency Having a test case like this [1], it sometimes fails on java.lang.RuntimeException: java.util.concurrent.ExecutionException: [Error: unable to resolve method using strict-mode: org.drools.compiler.integrationtests.facts.FactWithEnum.AnEnum()] [Near : {... enumValue == AnEnum.SECOND ....}] ... see here [2]. When using direct imports that are commented out in the pasted example, I see very rarely also a ClassCastException. See stacktrace here [3]. Tested with mvel 2.2.8 on 6.5.x branch, 2.3.0 and 2.3.1 on master branch. [1] https://gist.github.com/baldimir/d0f5f21d5b1a383887c5ebfb6013e5af [2] https://gist.github.com/baldimir/da5c9cb23fab2eae1576948c8ca2a4c8 [3] https://gist.github.com/baldimir/72eafe3909c21e25265cd3ee9a731d8e