JGroups throws OutOfMemoryError after running for a few hours ------------------------------------------------------------- Key: JGRP-33 URL: http://jira.jboss.com/jira/browse/JGRP-33 Project: JGroups Issue Type: Bug Affects Versions: 2.2.8 Environment: SUN JDK 1.4.2_05 & SUN JDK 1.5.0 on Windows & Unix platforms Reporter: B.S.Navin Assigned To: Bela Ban Fix For: 2.2.8 Attachments: fc-fast-udp-tcpping.xml, fc-fast-udp.xml, JGroupsMemTest.java, PublishThread2.java, runj10.sh I ran 10 instances of a simple program with 3 threads. The max memory is kept as the JVM default (64M). The 10 programs join the same JGroup and the threads in the programs keep publishing a small hashmap at 5 second intervals. The heap memory consumed (Runtime.totalMemory() - Runtime.freeMemory()) slowly increases over a period of 4-5 hours and reaches the default max limit (64M) when it starts throwing OutOfMemory errors on all instances. I have run the program on unix and windows machines with 1G RAM. Not able to make much from an HProf output of one of the instances. This seems to be the cause for the JBossCache bug "http://jira.jboss.com/jira/browse/JBCACHE-31" too. I have tried out a UDP/PING and a UDP/TCPPING combination and this problem occurs in both cases.