Looks like the version of drools on your server is different than your client. That would explain the class version issue

On Mon, Feb 2, 2009 at 5:19 PM, Zhang Jing-A52198 <j.zhang@motorola.com> wrote:

Hi All,

 

When I access the drools-server by URLConnection, I've always got such errors:

 

WARNING: RuleAgent(default) EXCEPTION (Mon Feb 02 16:09:46 CST 2009): org.drools.base.BaseEvaluator; local class incompatible: stream classdesc serialVersionUID = -7767879457606879276, local class serialVersionUID = -7149415669283058142. Stack trace should follow.

WARNING: java.io.InvalidClassException: org.drools.base.BaseEvaluator; local class incompatible: stream classdesc serialVersionUID = -7767879457606879276, local class serialVersionUID = -7149415669283058142

                at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:562)

                at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)

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

                at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)

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

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)

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

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

                at org.drools.rule.LiteralRestriction.readExternal(LiteralRestriction.java:66)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

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

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

                at org.drools.rule.LiteralConstraint.readExternal(LiteralConstraint.java:67)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

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

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

                at java.util.ArrayList.readObject(ArrayList.java:593)

                at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.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:1849)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)

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

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

                at org.drools.rule.Pattern.readExternal(Pattern.java:115)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

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

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

                at java.util.ArrayList.readObject(ArrayList.java:593)

                at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.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:1849)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)

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

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

                at org.drools.rule.GroupElement.readExternal(GroupElement.java:57)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

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

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

                at org.drools.rule.Rule.readExternal(Rule.java:170)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

                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.GeneratedMethodAccessor17.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.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:1849)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)

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

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

                at org.drools.rule.MVELDialectRuntimeData.readExternal(MVELDialectRuntimeData.java:42)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

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

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

                at java.util.HashMap.readObject(HashMap.java:1030)

                at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.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:1849)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)

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

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

                at org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegistry.java:41)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

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

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

                at org.drools.rule.Package.readExternal(Package.java:197)

                at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)

                at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)

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

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

                at org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:189)

                at org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:158)

                at org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:47)

                at org.drools.agent.URLScanner.readPackage(URLScanner.java:148)

                at org.drools.agent.URLScanner.getChangeSet(URLScanner.java:120)

                at org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:96)

                at org.drools.agent.RuleAgent.checkForChanges(RuleAgent.java:410)

                at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:362)

                at org.drools.agent.RuleAgent.configure(RuleAgent.java:347)

                at org.drools.agent.RuleAgent.init(RuleAgent.java:247)

                at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:187)

                at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:147)

                at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256)

                at org.drools.server.KnowledgeStatelessServlet.getRuleBase(KnowledgeStatelessServlet.java:109)

                at org.drools.server.KnowledgeStatelessServlet.doPost(KnowledgeStatelessServlet.java:71)

                at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)

                at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)

                at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)

                at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)

                at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)

                at

WARNING: org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)

                at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)

                at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)

                at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)

                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)

                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)

                at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)

                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)

                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)

                at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)

                at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)

                at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)

                at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)

                at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)

                at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)

                at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)

                at com.sun.enterprise.web.portunif.PortUnificationPipeline$PUTask.doTask(PortUnificationPipeline.java:380)

                at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)

                at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)

 

WARNING: java.lang.NullPointerException

                at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:363)

                at org.drools.agent.RuleAgent.configure(RuleAgent.java:347)

                at org.drools.agent.RuleAgent.init(RuleAgent.java:247)

                at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:187)

                at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:147)

                at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256)

                at org.drools.server.KnowledgeStatelessServlet.getRuleBase(KnowledgeStatelessServlet.java:109)

                at org.drools.server.KnowledgeStatelessServlet.doPost(KnowledgeStatelessServlet.java:71)

                at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)

                at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)

                at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)

                at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)

                at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)

                at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)

                at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)

                at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)

                at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)

                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)

                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)

                at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)

                at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)

                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)

                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)

                at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)

                at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)

                at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)

                at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)

                at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)

                at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)

                at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)

                at com.sun.enterprise.web.portunif.PortUnificationPipeline$PUTask.doTask(PortUnificationPipeline.java:380)

                at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)

                at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)

 

 

 

Can anyone help me to fix this problem? I've got the same errors when trying to run KnowledgeServiceServletTest.java from the drool-server source code.

 

Thanks,

Jing


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