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

[Davide Sottara]

5.5 was not thread-safe and some of these concurrency issues have been
fixed in later versions.
Could you try 5.6 or 6.x?

On 07/02/2014 08:19 AM, maruthi_s wrote:
> 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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