[rules-users] Unable to resolve class error , drools 5.5 in concurrent execution. JSR94Support and Spring

[maruthi_s]

Hi ,

We use Drools 5.5 and drool implementation is done through Spring
JSR94Support API>
The Rule engine is called in concurrent mode,
i.e , JSR94Support.executeStateless(name,list) is executed through multiple
threads.

And when the rules are executed  we randomly get the following exception

org.drools.RuntimeDroolsException: Unable to resolve class 'someclass(this
is sample)here actual class is printed>'
        at
org.drools.base.ClassFieldAccessorCache.getClass(ClassFieldAccessorCache.java:126)
        at
org.drools.base.ClassFieldAccessorCache.getClassObjectType(ClassFieldAccessorCache.java:48)
        at
org.drools.reteoo.ClassObjectTypeConf.<init>(ClassObjectTypeConf.java:83)
        at
org.drools.common.ObjectTypeConfigurationRegistry.getObjectTypeConf(ObjectTypeConfigurationRegistry.java:71)
        at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:159)
        at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)
        at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)
        at
org.drools.reteoo.ReteooStatelessSession.executeWithResults(ReteooStatelessSession.java:273)

The rules are registered every 15 minutes through
RuleAdministrator.registerRuleExecutionset ,
so whenever we refresh the rules and the subsequent thread even after the
registration is completed, fails with the above message. This happens only
when the rules are invoked concurrently.

Please advise. 



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