[jboss-jira] [JBoss JIRA] (JGRP-1834) ProbeHandler memory leak when enable_diagnostics=false

[Dennis Reed (JIRA)]

Dennis Reed created JGRP-1834:
---------------------------------

             Summary: ProbeHandler memory leak when enable_diagnostics=false
                 Key: JGRP-1834
                 URL: https://issues.jboss.org/browse/JGRP-1834
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 3.2.12
            Reporter: Dennis Reed
            Assignee: Bela Ban


There is a memory leak in TP#preregistered_probe_handlers when enable_diagnostics is false.

TP#registerProbeHandler stores ProbeHandlers in the preregistered_probe_handlers list if diag_handler is null (either because TP has not been started, or enable_diagnostics is false).

When TP is started, if enable_diagnostics is true it copies them to the diag_handler and clears out preregistered_probe_handlers.
But if enable_diagnostics is false, preregistered_probe_handlers will never get cleared.

This prevents anything that registered a probe handler from being GC'd.  For example with a shared JGroups transport like EAP uses, this can cause an Infinispan CacheManager that has been stopped to never get GC'd.
(This issue was noticed because of a buildup of DefaultCacheManager instances in a heap dump after an application had been redeployed a few times).




--
This message was sent by Atlassian JIRA
(v6.2.3#6260)