[jboss-jira] [JBoss JIRA] (WFLY-9849) Hibernate session related leak on module undeployment

Hibernate session related leak on module undeployment ----------------------------------------------------- Key: WFLY-9849 URL: https://issues.jboss.org/browse/WFLY-9849 Project: WildFly Issue Type: Bug Affects Versions: 11.0.0.Final, 12.0.0.Final Environment: * Ubuntu 16.04.3 LTS * OpenJDK 1.8.0_151 * Wildfly 11.0.0.Final Seems to occur at least on CentOS 7/OpenJDK 1.8.0_151 also. Reporter: Joni Syri Assignee: Scott Marlow In some cases it seems that removing deployment from the Wildfly, doesn't free up {{org.hibernate.internal.SessionFactoryImpl}}- instance related to the deployment. (plus some other Hibernate related classes). This can be seen by taking memory dump with VisualVM and looking up {{SessionFactoryImpl}} instances. This leads to cumulative memory leak in cases, where application is repeatedly deployed/undeployed (or updated). updated: Seems to occur on 12.0.0.Final also Memory dumps can be found at https://drive.google.com/drive/folders/1WbHB6hRpr_lrc4yb4yxWLpeObmJlNCzD (wildfly-leak-1 is after first deployment, wildfly-leak-2 after few re-deploys) server.log https://drive.google.com/file/d/1I32OTnPWeopVEtRC3ol-pjkH2dlkLizD/view?us...