It's used for indexing in joins. It looks like you are using the experimental multi-threading mode, I'd recommend you disable that, and try the latest 5.6.0.SNAPSHOT builds if you have problems.
Mark On 11 May 2013, at 17:01, Ming Fang <mingf...@mac.com> wrote: > What is the purpose of RightTupleIndexHashTable? > We are getting the exception below but unable to come up with a self > contained unit test to demonstrate the problem. > > Caused by: java.lang.NullPointerException: null > at > org.drools.core.util.index.RightTupleIndexHashTable.removeAdd(RightTupleIndexHashTable.java:344) > ~[drools-core-5.5.0.Final.jar:5.5.0.Final] > at org.drools.reteoo.JoinNode.modifyRightTuple(JoinNode.java:224) > ~[drools-core-5.5.0.Final.jar:5.5.0.Final] > at > org.drools.reteoo.PropagationQueuingNode$ModifyToSinkAction.execute(PropagationQueuingNode.java:513) > ~[drools-core-5.5.0.Final.jar:5.5.0.Final] > at > org.drools.reteoo.PropagationQueuingNode.propagateActions(PropagationQueuingNode.java:280) > ~[drools-core-5.5.0.Final.jar:5.5.0.Final] > at > org.drools.reteoo.PropagationQueuingNode$PropagateAction.execute(PropagationQueuingNode.java:588) > ~[drools-core-5.5.0.Final.jar:5.5.0.Final] > at > org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:993) > [drools-core-5.5.0.Final.jar:5.5.0.Final] > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users
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