Every JMXConnectorFactory#connect() creates a new ThreadGroup which is never reclaimed -------------------------------------------------------------------------------------- Key: REMJMX-160 URL: https://issues.jboss.org/browse/REMJMX-160 Project: Remoting JMX Issue Type: Bug Affects Versions: 1.1.3.Final, 3.0.1.Final Reporter: Masafumi Miura Assignee: Darran Lofthouse Priority: Major In JMX client application, every JMXConnector#connect() invocation creates a new ThreadGroup which is never reclaimed. https://github.com/jbossas/remoting-jmx/blob/3.0.1.Final/src/main/java/or... If a JMX client application lives for long periods of time and repeats to invoke JMXConnector#connect() and JMXConnector#close(), a lot of ThreadGroup instances are retained eventually.