Class loader leaks when JDBC driver as jar deployment is undeloyed ------------------------------------------------------------------ Key: WFLY-14114 URL: https://issues.redhat.com/browse/WFLY-14114 Project: WildFly Issue Type: Bug Components: JCA Reporter: Lin Gao Assignee: Tomasz Adamski Priority: Major Labels: downstream_dependency Fix For: 22.0.0.Beta1 Class loader leaks when JDBC driver as jar deployment is undeloyed. It will eventually leads to Metaspace out of memory error when "-XX:MaxMetaspaceSize" option is specified.   Normally JDBC driver is not undeloyed or redeployed by user frequently, but configuration reload command, which is regularly used, also triggers JDBC driver redeployment and cause class loader leak. JDBC driver should be deregistered while undeloying.