I found a fix for the ClassLoader leak, and submitted a Jira ticket with a git pull request. So far it is working quite well... https://issues.jboss.org/browse/DROOLS-521 On Mon, Jun 9, 2014 at 5:42 PM, A. Craig West <acraigwest(a)gmail.com&gt; wrote: > I am currently converting a Drools 5.5.0 installation to 6.0.1 Final, > due to many memory leaks in 5.5.0. Our use case involves a > knowledgebase of several thousand rules which are updated at run-time > quite frequently. As a result, we have found it necessary to do > incremental builds of rules. I based the code for this on the > integration tests: > https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test... > > This is working fairly well so far, but while testing, I noticed a > fairly severe increase in PermGen heap usage every time I modify my > rules. > Using jhat and the Eclipse memory analyzer, I was able to track down > the source of the problem to a classloader leak in the JavaDialect > class. Whenever a rule is added to the JavaDialect, a RuleErrorHandler > is added to an internal Map named errorHandlers. Unfortunately, this > RuleErrorHandler is never removed, and it contains a reference to a > stale PackageClassLoader. I am still working out how to fix this. _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev