[rules-users] intermittent error from mvel

[hongyu lu]

Hi,

I am seeking some help here for a very weird issue we ran into with drools 4.0.7. The error is intermittent but once happens it will be consistent for the rest rule evaluation.

We have a fact object called com.like.rules.facts.AllocationFact. But somehow the class name was messed up when passed to mvel for accessor optimization:com.like.rules.facts.AllocationFact.facts.AllocationFact.facts.AllocationFac
t. Some parsing related problem? Any advice on how to debug this kind issues?

thanks a lot for your help!
Jeff

org.drools.spi.ConsequenceException: org.mvel.CompileException: class or
class reference not found:
com.like.rules.facts.AllocationFact.facts.AllocationFact.facts.AllocationFac
t()
    at 
org.drools.base.DefaultConsequenceExceptionHandler.handleException(DefaultCo
nsequenceExceptionHandler.java:13)
    at 
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:558)
    at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:518)
    at 
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.j
ava:475)
    at 
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.j
ava:439)
    at com.like.ab.ABServiceImpl.determineAttributes(ABServiceImpl.java:125)
    at com.like.ab.ABServiceImpl.getCustomer(ABServiceImpl.java:90)
    at com.like.ab.ABServiceImpl.getAttributes(ABServiceImpl.java:52)
    at 
com.like.ab.ABRequestContextImpl.conditionallyInit(ABRequestContextImpl.java
:130)
    at com.like.ab.ABRequestContextImpl.<init>(ABRequestContextImpl.java:39)
    at com.like.ab.ABRequestContextImpl.<init>(ABRequestContextImpl.java:32)
    at 
com.like.ab.ABServletRequestFilter.allocateLazyInitableRequestContext(ABServ
letRequestFilter.java:110)
    at 
com.like.ab.ABServletRequestFilter.doFilter(ABServletRequestFilter.java:56)
    at 
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java
:70)
    at 
com.like.web.LikeWWWRequestFilter.wrapWithLikeWWWRequestContext(LikeWWWReque
stFilter.java:114)
    at 
com.like.web.LikeWWWRequestFilter.doFilter(LikeWWWRequestFilter.java:74)
    at 
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java
:70)
    at 
com.like.web.ExceptionHandlerFilter.doFilter(ExceptionHandlerFilter.java:80)
    at 
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java
:70)
    at com.caucho.filters.XsltFilter.doFilter(XsltFilter.java:121)
    at com.like.web.LikeXsltFilter.doFilter(LikeXsltFilter.java:22)
    at 
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java
:70)
    at 
com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:1
63)
    at 
com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:
208)
    at 
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:259)
    at com.caucho.server.port.TcpConnection.run(TcpConnection.java:363)
    at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:490)
    at com.caucho.util.ThreadPool.run(ThreadPool.java:423)
    at java.lang.Thread.run(Thread.java:595)
Caused by: org.mvel.CompileException: class or class reference not found:
com.like.rules.facts.AllocationFact.facts.AllocationFact.facts.AllocationFac
t()
    at 
org.mvel.optimizers.impl.asm.ASMAccessorOptimizer.optimizeObjectCreation(ASM
AccessorOptimizer.java:1842)
    at 
org.mvel.ast.NewObjectNode.getReducedValueAccelerated(NewObjectNode.java:191
)
    at org.mvel.ExecutableAccessor.getValue(ExecutableAccessor.java:45)
    at 
org.mvel.ast.TypedVarNode.getReducedValueAccelerated(TypedVarNode.java:43)
    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)
    ... 27 more