I am using Drools 5.1.1 to design our rule engine, the rule engine need to
dynamic loading of rules from Guvnor because our marking team need to change
the rules frequently(about 40~100 times every day), we have over 5000 rules
in Guvnor.
This is my code ahout that:
public KnowledgeBase getKnowledgeBase() {
// hold a static reference in class
if(kagent != null) {
return kagent.getKnowledgeBase();
}
ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "5");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
ResourceFactory.getResourceChangeScannerService().start();
ResourceFactory.getResourceChangeNotifierService().start();
kagent = KnowledgeAgentFactory.newKnowledgeAgent("myagent");
kagent.applyChangeSet(ResourceFactory.newClassPathResource("changeset-url.xml"));
return kagent.getKnowledgeBase();
}
This is content of changeset-url.xml:
<change-set xmlns='http://drools.org/drools-5.0/change-set'
xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'
xs:schemaLocation='http://drools.org/drools-5.0/change-set
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/main/resources/change-set-1.0.0.xsd'
>
<add>
<resource
source='http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/PackageName/snapshot_release'
type='PKG' />
</add>
</change-set>
After i start my service, i found each time When i rebuild package and
created new snapshot to snapshot_release, my service indeed can find the
changing and start to reload rules from guvnor, but memory increased about
50M, it didn't down even if the reloading had finished. After i reput do
this step many times(about 25 times), OutOfMemoryError happened.
So, I want to know, why memory increased continually？It sames drools didn't
do garbage collection.
Has anyone experienced this?
Thanks
- Oliver
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