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

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 Fix For: 3.4.4, 3.5 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).