[rules-users] Drools KB Object hierarchy Serilisation and Deserialisation thread safety issue

Hi, We have found that some of the drools classes are not thread safe and hence causing the whole KB serialisation and deserialisation issues in a highly concurrent distributed cluster. The below is an example of one of the instances we have come across where the usage of a non thread safe collection as instance variables has caused the issue. Could someone look into this and advise: 1) If this has been reported /identified and logged somewhere as an issue already 2)If there has been any fix to problems like this in later versions of 5.3.0.Final ?. 3)If not fixed already what is the process to initiate a fix. Caused by: java.io.InvalidObjectException: Illegal mappings count: -1 at java.util.HashMap.readObject(HashMap.java:1130) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at java.io.ObjectStreamClass.invokeReadObject( ObjectStreamClass.java:1004) at java.io.ObjectInputStream.readSerialData( ObjectInputStream.java:1891) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1796) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at org.jbpm.workflow.core.DroolsAction.readExternal( DroolsAction.java:61) at org.jbpm.workflow.core.impl.DroolsConsequenceAction.readExternal( DroolsConsequenceAction.java:49) at java.io.ObjectInputStream.readExternalData( ObjectInputStream.java:1835) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1794) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at org.drools.rule.JavaDialectRuntimeData.readExternal( JavaDialectRuntimeData.java:182) at java.io.ObjectInputStream.readExternalData( ObjectInputStream.java:1835) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1794) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at java.util.HashMap.readObject(HashMap.java:1155) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at java.io.ObjectStreamClass.invokeReadObject( ObjectStreamClass.java:1004) at java.io.ObjectInputStream.readSerialData( ObjectInputStream.java:1891) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1796) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at org.drools.rule.DialectRuntimeRegistry.readExternal( DialectRuntimeRegistry.java:59) at java.io.ObjectInputStream.readExternalData( ObjectInputStream.java:1835) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1794) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at org.drools.rule.Package.readExternal(Package.java:197) at java.io.ObjectInputStream.readExternalData( ObjectInputStream.java:1835) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1794) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at java.util.HashMap.readObject(HashMap.java:1155) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at java.io.ObjectStreamClass.invokeReadObject( ObjectStreamClass.java:1004) at java.io.ObjectInputStream.readSerialData( ObjectInputStream.java:1891) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1796) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at org.drools.common.AbstractRuleBase.readExternal( AbstractRuleBase.java:270) at org.drools.reteoo.ReteooRuleBase.readExternal( ReteooRuleBase.java:223) at org.drools.impl.KnowledgeBaseImpl.readExternal( KnowledgeBaseImpl.java:116) at java.io.ObjectInputStream.readExternalData( ObjectInputStream.java:1835) at java.io.ObjectInputStream.readOrdinaryObject( ObjectInputStream.java:1794) at java.io.ObjectInputStream.readObject0( ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370 ) at com.hsbc.gbm.dsl.domain.DSLRuleSet$Serializer.createInstance( DSLRuleSet.java:328) at com.hsbc.gbm.dsl.domain.DSLRuleSet$Serializer.createInstance( DSLRuleSet.java:1) at com.hsbc.gbm.dsl.domain.AbstractSerializer.deserialize( AbstractSerializer.java:144) Thanks and regards, Adarsh CHAINI SENIOR LEAD DEVELOPMENT SPECIALIST | HSBC Bank Plc 8 Canada Square, London E14 5HQ, UK _______________________________________________ Phone Int: (0)79914720 Ext: +44 (0)20 79914720 Mobile +44(0)7595530105 Email adarsh.chaini(a)hsbcib.com _______________________________________________ Protect our environment - please only print this if you have to! ************************************************************ HSBC Bank plc may be solicited in the course of its placement efforts for a new issue, by investment clients of the firm for whom the Bank as a firm already provides other services. 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