Re: [rules-users] Drools Objects not released from heap

Hello, I have a weird issue, and I'm trying to figure out if this is a bug I should report, or an error in my rule. I'm running an application with a heap space (min: 512mb, max: 1024mb) that gets full and eventually overflows relatively quickly (12hrs or less). We insert about 112 records into a Stateful Drools Session (Drools 5.1 CR1 released 7/22/2010) every 30seconds, using CLOUD session type, single thread, with fireUntilHalt. Our rules evaluate the object (A) we give it, and in some cases instantiate a new object (B) and insert it into the session. After processing object (A), we retract it from the session. Another rule matches on object (B), and when finished, also retracts the object. When I do a heap snapshot, I've noticed quite a few Drools-related classes, along with unreleased instantiations of object(A) & object(B) (more of the latter). Obviously I have to take into consideration that objects are being inserted at the time of the snapshot, but over a couple hours I'll have 1000's of these objects. I've found the only fix to be to release the session. I should note - calling session.getObjects() shows an empty list (size 0). Is this a bug? When retract is called, shouldn't it free up the FactHandle & Object to be collected? And is instantiating an object in a rule incorrect for some reason? Below is a small chart of classes - the number of instances - and space taken. (TemperatureEvent represents object (A), while AssetShallowRemote represents object (B)) Any input would be appreciated. Dan | Class | Instances | Size | | |--------------------------------------------------------------+-----------+----------+---| | java.lang.String | 1155258 | 41589288 | | | char[] | 1153540 | 91560120 | | | java.util.concurrent.LinkedBlockingQueue$Node | 329989 | 10559648 | | | java.util.LinkedHashMap$Entry | 153489 | 9209340 | | | java.util.HashMap$Entry | 151929 | 6684876 | | | java.sql.Timestamp | 117017 | 4212612 | | | org.drools.reteoo.LeftTuple | 53395 | 8756780 | | | org.drools.common.AgendaItem | 53390 | 5819510 | | | org.drools.retoo.RightTuple | 53386 | 5125056 | | | my.test.package.AssetShallowRemote | 42995 | 11780630 | | | org.drools.common.DefaultFactHandle | 37273 | 3280024 | | | org.drools.core.util.ObjectHashSet$ObjectEntry | 37273 | 1341828 | | | org.drools.common.PropagationContextImpl | 32721 | 2683512 | | | org.drools.core.util.ObjectHashMap$ObjectEntry | 32721 | 1639924 | | | my.test.package.TemperatureEvent | 7165 | 917120 | | -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Objects-not-re... Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users