[rules-users] Complicated Issue

Michael Anstis michael.anstis at gmail.com
Tue Oct 9 04:03:58 EDT 2012 

Based upon the stack trace I would say "[it] was working fine for my
application." might not be strictly true.

We always promote use of compatible versions of Drools Expert and Guvnor.
See below.

http://docs.jboss.org/drools/release/5.4.0.Final/droolsjbpm-introduction-docs/html/compatibility.html


On 9 October 2012 08:31, abhinay_agarwal <abhinay_agarwal at infosys.com>wrote:

> hey,
>
> M using guvnor 5.3.0 Final version and two instances of guvnor.
>
> In my first guvnor application, i ve two packages containg all my rules
> which i am accessing using drools core and knowledge api v5.2.0 Final .I
> use
> type "DRL" to extract rules from my change set.
>
>
> In my second guvnor application, i just have a package which contains my
> JBPM process. Here, i am using drools 5.3.1 Final jars to connect and make
> my kbase. i use type = "PKG" in my chnage set, which is contradictory to
> JIRA <https://issues.jboss.org/browse/JBRULES-3388>   is opened that a PKG
> cannot be read, but was working fine for my application.
>
> Now i dont want to deploy two different wars of guvnor and was expecting to
> do it by deploying just 1 guvnor.
>
> So instead of taking the headache of using different jars, i used a neutral
> GUVNOR and drools 5.4.0 final version. I deployed the guvnor, imported the
> old repository, built the packages and tried firing the rules using type =
> "DRL" in my change set. Everything Worked fine.
>
> As soon as i changed my type = "PKG" in my change set to access the rules,
> i
> got an error :
>
> java.lang.UnsupportedClassVersionError:
> Institutional/CalculateDateDifference : Unsupported major.minor version
> 51.0
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
>         at
>
> org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
>         at
>
> org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
>         at
>
> org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
>         at
>
> org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>         at
>
> org.drools.rule.MVELDialectRuntimeData.getParserConfiguration(MVELDialectRuntimeData.java:270)
>         at
>
> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:203)
>         at
> org.drools.base.mvel.MVELConsequence.compile(MVELConsequence.java:75)
>         at
>
> org.drools.rule.MVELDialectRuntimeData.onBeforeExecute(MVELDialectRuntimeData.java:173)
>         at
>
> org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:144)
>         at
> org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:599)
>         at
> org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472)
>         at
>
> org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1085)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
>         at
>
> com.infy.fcs.drools.adapter.DroolsGuvnorTest.readKnowledgeBase(DroolsGuvnorTest.java:196)
>         at
>
> com.infy.fcs.drools.adapter.DroolsGuvnorTest.main(DroolsGuvnorTest.java:107)
>
>
> When i tried to access the process package(Which is a diff package and
> contains only a process), i got the following error
>
> java.lang.UnsupportedClassVersionError:
>
> Fatca_Process/Process_Fatca_Process_Fatca_integration_queue_f06d3a378a5f49d5b7589aae2c0b686eReturnValueEvaluator7Invoker
> : Unsupported major.minor version 51.0
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
>         at
>
> org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
>         at
>
> org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
>         at
>
> org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
>         at
>
> org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>         at
>
> org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:435)
>         at
>
> org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:430)
>         at
>
> org.drools.rule.JavaDialectRuntimeData.onBeforeExecute(JavaDialectRuntimeData.java:256)
>         at
>
> org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:138)
>         at
> org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:599)
>         at
> org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472)
>         at
>
> org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1085)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
>         at
>
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
>         at
>
> com.infy.fcs.drools.adapter.DroolsGuvnorTest.readKnowledgeBase(DroolsGuvnorTest.java:196)
>         at
>
> com.infy.fcs.drools.adapter.DroolsGuvnorTest.main(DroolsGuvnorTest.java:107)
>
>
> here is the attached changeset that i am using
>
>
> changeset_process.xml
> <http://drools.46999.n3.nabble.com/file/n4020175/changeset_process.xml>
> ChangeSet_rules.xml
> <http://drools.46999.n3.nabble.com/file/n4020175/ChangeSet_rules.xml>
>
> please lemme know, if wat i am trying to achieve is evne possible or not?
>
> If yes, then where am i going wrong ?
>
>
>
> --
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