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: Jason Greene 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).