[jboss-jira] [JBoss JIRA] (DROOLS-3385) Stateful session is not thread safe for update operation on JDK11

[Radovan Synek (Jira)]

     [ https://issues.jboss.org/browse/DROOLS-3385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Radovan Synek updated DROOLS-3385:
----------------------------------
    Summary: Stateful session is not thread safe for update operation on JDK11  (was: Stateful session not thread safe for update operation)


> Stateful session is not thread safe for update operation on JDK11
> -----------------------------------------------------------------
>
>                 Key: DROOLS-3385
>                 URL: https://issues.jboss.org/browse/DROOLS-3385
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 7.16.0.Final
>            Reporter: Radovan Synek
>            Assignee: Mario Fusco
>            Priority: Critical
>
> We have a test failure in multithreaded solving in OptaPlanner (please see the linked issue for details).
> java.util.ConcurrentModificationException: null
> at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
> at org.drools.core.impl.KnowledgeBaseImpl.getOrCreateExactTypeDeclaration(KnowledgeBaseImpl.java:1458)
> at org.drools.core.common.NamedEntryPoint.update(NamedEntryPoint.java:324)
> at org.drools.core.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:1570)
> at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.update(DroolsScoreDirector.java:254)



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