Drools throws NullPointerException in retractLeftTuple()

Solution Verified - Updated -

Issue

  • Drools application throws NullpointerException

  • The root exception is :

    Caused by:
null
    at org.drools.reteoo.RightInputAdapterNode.retractLeftTuple(RightInputAdapterNode.java:154)
    at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:217)
    at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateRetractRightTuple(SingleLeftTupleSinkAdapter.java:124)
    at org.drools.reteoo.JoinNode.retractRightTuple(JoinNode.java:151)
    at org.drools.reteoo.ModifyPreviousTuples.retractTuples(ModifyPreviousTuples.java:132)
    at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:176)
    at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1442)
    at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1349)
    at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:183)
    at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:196)

Environment

  • JBoss Business Rules Management System [BRMS] Platform 5.1.0.GA
  • Community Drools 5.1.1

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