[rules-users] Help with MR3

Hello, I've just started integrating MR3 into my project (I've previously used 3.06). The drl compiles and everything seems fine, but during tests the following exception is thrown for time to time: java.lang.ArrayIndexOutOfBoundsException: 17 at org.drools.util.AbstractHashTable$HashTableIterator.next( AbstractHashTable.java:250) at org.drools.reteoo.Rete$ObjectTypeConf.buildCache(Rete.java:434) at org.drools.reteoo.Rete$ObjectTypeConf.getObjectTypeNodes(Rete.java:425) at org.drools.reteoo.Rete.assertObject(Rete.java:172) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190) at org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute( ReteooWorkingMemory.java:163) at org.drools.common.AbstractWorkingMemory.executeQueuedActions( AbstractWorkingMemory.java:1135) at org.drools.common.AbstractWorkingMemory.insert( AbstractWorkingMemory.java:781) at org.drools.common.AbstractWorkingMemory.insert( AbstractWorkingMemory.java:584) at org.drools.jsr94.rules.StatefulRuleSessionImpl.addObject( StatefulRuleSessionImpl.java:162) This only happens during high load tests. Can anyone help me? Thanks