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

Davide, Thanks for your reply on this.What does CR1stands for in 5.6.0.CR1and can someone point me to the release life cycle timelines?. Also the important aspect is are 5.6.0.CR1and *5.5.0.Final* versions backward compatible to 5.3.0.Final and fully regressed ? Is there any documentation that describes the major changes like this .We are mostly using the rule engine with the rule flow aspects of the product Thanks and regards, *Adarsh CHAINI * From: Davide Sottara <dsotty(a)gmail.com&gt; To: rules-users(a)lists.jboss.org Date: 14/12/2013 19:56 Subject: Re: [rules-users] Drools KB Object hierarchy Serilisation and Deserialisation thread safety issue Sent by: rules-users-bounces(a)lists.jboss.org ------------------------------------------------------------------------ As far as I know, older versions of Drools were not guaranteed to be thread-safe, and the whole (de)serialization subsystem has been upgraded since 5.3.0.Final. Could you try a later version such as 5.5.0.Final or 5.6.0.CR1? Bugs and issues are usually reported using JIRA (community) or Bugzilla (product) You can find more information on how to report/contribute here:_ __http://www.jboss.org/contribute_ or in the drools documentation, chapter 1.2 Davide On 12/13/2013 12:39 PM, _adarsh.chaini(a)hsbcib.com_ <mailto:adarsh.chaini@hsbcib.com>wrote: 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_ <mailto:adarsh.chaini@hsbcib.com> _______________________________________________ Protect our environment - please only print this if you have to! 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