The fol­low­ing Error relat­ed to JBoss Drools frus­trat­ed me because of Java Ver­sion mis­match.

The ver­sion of Drools we are using runs prop­er­ly only with JDK 1.5 where as we are try­ing hard to make it run on JDK1.6 and end­ed up with the fol­low­ing issue.


java.lang.ClassNotFoundException: [Lorg.drools.rule.Declaration;

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa

der.java:1359)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa

der.java:1205)

at org.drools.rule.PackageCompilationData$PackageClassLoader.loadClass(U

nknown Source)

at java.lang.ClassLoader.loadClass(ClassLoader.java:251)

at org.drools.common.ObjectInputStreamWithLoader.resolveClass(Unknown So

urce)

at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:157

5)

at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)

at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1624)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323)

at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:19

45)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1

753)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)

at java.util.HashMap.readObject(HashMap.java:1029)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.

java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces

sorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974

)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1

753)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)

at org.drools.rule.PackageCompilationData.readExternal(Unknown Source)

at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:179

2)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1

751)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)

at org.drools.rule.Package.readExternal(Unknown Source)

at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:179

2)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1

751)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)

at java.util.HashMap.readObject(HashMap.java:1029)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.

java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces

sorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974

)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1

753)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)

at org.drools.common.AbstractRuleBase.doReadExternal(Unknown Source)

at org.drools.reteoo.ReteooRuleBase.readExternal(Unknown Source)

at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:179

2)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1

751)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)

at com.infosys.ipsp.ade.impl.RuleBaseRepositoryImpl.deSerializeRuleBase(

RuleBaseRepositoryImpl.java:73)

at com.infosys.ipsp.ade.impl.RuleBaseRepositoryImpl.deSerializeRuleBase(

RuleBaseRepositoryImpl.java:85)

at com.infosys.ipsp.ade.userinteraction.ConsultationServlet.doGet(Consul

tationServlet.java:108)

at com.infosys.ipsp.ade.userinteraction.ConsultationServlet.doPost(Consu

ltationServlet.java:70)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl

icationFilterChain.java:269)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF

ilterChain.java:188)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV

alve.java:210)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV

alve.java:174)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j

ava:127)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j

ava:117)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal

ve.java:108)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav

a:151)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java

:870)

at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p

rocessConnection(Http11BaseProtocol.java:665)

at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo

int.java:528)

at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol

lowerWorkerThread.java:81)

at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP

ool.java:685)

at java.lang.Thread.run(Thread.java:619)


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