OutOfMemoryError ---------------- Key: JGRP-1180 URL: https://jira.jboss.org/jira/browse/JGRP-1180 Project: JGroups Issue Type: Bug Affects Versions: 2.8 Environment: 2.8.0.GA Reporter: Peter Kormos Assignee: Bela Ban Hi Guys, I wrote a simple program. public testbed() throws Exception { JChannel channel = new JChannel(); channel.connect("channelName"); for (int i = 0; i < 100000000; i++) { Message msg = new Message( null, null, "Test"); channel.send(msg); // Thread.sleep(10); if (i % 1000 == 0) System.out.print("."); } } When I run it with java -Xmx8m -XX:+HeapDumpOnOutOfMemoryError -cp .;jgroups-all.jar testbed not always, but quite often it dies with OutOfMemoryError When I look at the heap dump with jhat, for "Instance Counts" it tells me 22036 instances of class org.jgroups.Message 22036 instances of class org.jgroups.protocols.pbcast.NakAckHeader 22036 instances of class org.jgroups.util.Headers 21316 instances of class org.jgroups.Event 21314 instances of class org.jgroups.util.Queue$Element 304 instances of class org.jgroups.util.UUID Why are there so many message objects stuck in memory? java org.jgroups.Version prints Version: 2.8.0.GA CVS: $Id: Version.java,v 1.81 2009/12/01 10:31:13 belaban Exp $ I'm using Windows Xp with 1.6 JDK -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira