[jboss-jira] [JBoss JIRA] Created: (JBRULES-2421) org.drools.RuntimeDroolsException: unable to determine ValueType for Class [class MyClass] on IBM JVM with JIT enabled

Tue Feb 2 16:30:25 EST 2010

org.drools.RuntimeDroolsException: unable to determine ValueType for Class [class MyClass] on IBM JVM with JIT enabled
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                 Key: JBRULES-2421
                 URL: https://jira.jboss.org/jira/browse/JBRULES-2421
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 4.0.7
            Reporter: Tihomir Surdilovic
            Assignee: Mark Proctor

On IBM JVM with JIT enabled using Drools 4.0.7 often the following exception occurs:

org.drools.RuntimeDroolsException: unable to determine ValueType for Class [class MyClass]
       at org.drools.base.ValueType.determineValueType(ValueType.java:222)
       at org.drools.base.ClassObjectType.<init>(ClassObjectType.java:56)
       at org.drools.reteoo.Rete$ClassObjectTypeConf.<init>(Rete.java:442)
       at org.drools.reteoo.Rete.assertObject(Rete.java:152)
...

We have determined that in the IBM JVN with JIT enabled, the expression "XXXX instanceof Object" fails sometimes. On the other hand expression "XXXX isAssignableFrom(YYYYYY) ... " works as expected. The code change required here is in org.drools.base.ValueType change:

...
} else if ( clazz instanceof Object ) {
return ValueType.OBJECT_TYPE;
...

to 

...
else if ( Object.class.isAssignableFrom( clazz ) ) {
          return ValueType.OBJECT_TYPE;
...

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