[rules-users] ClassNotFoundException for functions if cached Rulebase used

[Seema Manivannan]

hi,
I'm using Drools 4.0.7. Using BRMS, I created a package which consists of a
technical drl rule and a function. As the performance best practice
suggestion goes, I'm caching the Rulebase instance that is obtained from the
RuleAgent. However, I'm facing a problem when I'm doing this. The rules
execute just fine if I call fireAllRules() just once. However, I get a
ClassNotFoundException for the functions in my package when I fire the rules
for the second time using the cached Rulebase. However, this problem does
not occur if I create the Rulebase every time without caching. Could this be
a possible bug?
Thanks,
Seema

Here is the stack trace (the package name is Test and the function name is
TestMe)

01:23:33,359 ERROR [[InsuranceServlet]] Servlet.service() for servlet
InsuranceServlet threw exception
java.lang.ClassNotFoundException: Test.TestMe
        at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)

        at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)

        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
        at ASMAccessorImpl_91782341221162783340.getValue(Unknown Source)
        at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:174)
        at org.mvel.MVELRuntime.execute(MVELRuntime.java:90)
        at org.mvel.CompiledExpression.getValue(CompiledExpression.java:111)

        at org.mvel.MVEL.executeExpression(MVEL.java:235)
        at
org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:48)
        at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:554)
        at
org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:518)
        at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:475)

        at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:439)

        at
org.acme.insurance.web.DroolsBusiness.execute(DroolsBusiness.java:122)
        at
org.acme.insurance.web.InsuranceServlet.doGet(InsuranceServlet.java:38)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

        at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)

        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)

        at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)

        at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)

        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

        at
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)

        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)

        at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
        at java.lang.Thread.run(Unknown Source)
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