[jboss-jira] [JBoss JIRA] Created: (JGRP-1016) memory leak in GMS protocol

Tue Jul 28 05:49:29 EDT 2009

memory leak in GMS protocol
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                 Key: JGRP-1016
                 URL: https://jira.jboss.org/jira/browse/JGRP-1016
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 2.7
            Reporter: Miro Selent
            Assignee: Bela Ban
            Priority: Critical

Found in org.jgroups.protocols.pbcast.GMS in a scenario where members were killed and restarted very frequently and one member is persistently running. The memory consumption icreased very quickly until OutOfMemory.

Our analysis with JProfiler leads to the following assumption:
The number of org.jgroups.stack.IpAddress held by merge_ack_collector icreases every time a member was (re)started. 
These instances were never removed because no MERGE events occured. This is completely clear since there was only one coordinator (the long running member). 
If GMS receives no MERGE event it never cleans up the stored IpAddress instances in the merge_ack_collector.

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