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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I am currently running version 5.1.0M2. I have 18 different binary rulesets [packages] that are stored on the local filesystem. The rulesets range in size from 4K to 131Mb. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When my application starts I load each ruleset into a knowledgeAgent and store the knowledgeAgent into a hashmap which is stored in memory. They are loaded using the following xml:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><?xml version=\"1.0\" encoding=\"UTF-8\"?><o:p></o:p></p><p class=MsoNormal><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.xsd'><o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'><add><o:p></o:p></p><p class=MsoNormal style='margin-left:.5in;text-indent:.5in'><resource source='file://PATH_TO_BINARY' type='PKG' /><o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'></add><o:p></o:p></p><p class=MsoNormal></change-set><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The knowledgeAgentConfiguration is setup as:<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>drools.agent.scanDirectories = false<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>drools.agent.newInstance = false<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>drools.agent.scanResources = false<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>drools.agent.monitorChangeEvents = false<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>After the all the agents are loaded and stored in the hashmap the total memory used in the app is 6.2GB. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Once the application is running, if a business user needs to update a set of rules there is a process in place to refresh all the knowledgeAgents with new rulesets. In a new thread. the code clears the hashmap, sets the hashmap to null, calls for garbage collection to occur, and it then constructs a new hashmap and loads all the rules as it does at application startup. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The knowledge agent is logging the following when the ruleset is loaded:<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>KnowledgeAgent applying ChangeSet<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>KnowledgeAgent performing an incremental build of the ChangeSet<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>KnowledgeAgent incremental build of KnowledgeBase finished and in use<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It takes a large amount of time to do this process [double to triple the time of application startup]. After this occurs the memory used by the app increases [to nearly double the original size 12.2GB] and the CPU is maxed out. After some time the CPU usage drops and the app is usable again but the memory never decreases. If a business user refreshes the rules again, the memory increases again and the CPU is maxed out and the app becomes unresponsive because the memory is completely maxed out.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>There is obviously a memory leak somewhere and a large one at that. Is this the proper way to be caching KnowledgeAgents into memory so the rulessets don’t need to be re-loaded everytime a knowledgeAgent is run? Is my problem the use of the hashmap? Do I need to remove the original knowledgeAgents that were in the hashmap?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks for any help.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>