While investigating an unrelated problem with an application that has one long-lived jgroups member and four other processes that often close their channel and create a new one, I found that GossipClient is leaking Timers. The GossipClient.stop method seems to be responsible for this:

public void stop()

{ timer_running=false; timer.cancel(); groups.clear(); // provide another refresh tools in case the channel gets reconnected timer=new Timer(); refresher_task=new Refresher(); }

Adding a destroy() method in TCPGOSSIP and GossipClient seems to solve the problem:

GossipClient.java
public void destroy()

{ timer_running=false; timer.cancel(); groups.clear(); }

TCPGOSSIP.java
public void destroy() {
if (gossip_client != null)

{ gossip_client.destroy(); gossip_client = null; }

}