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The KuduScanNode attempts to push IN list predicates to the Kudu scan, but NULL literals cannot be pushed. The code in KuduScanNode needed to check if the Literals in the InPredicate is a NullLiteral, in which case the entire IN list should not be pushed to Kudu. The same handling is already in place for binary predicate pushdown. Change-Id: Iaf2c10a326373ad80aef51a85cec64071daefa7b Reviewed-on: http://gerrit.cloudera.org:8080/5505 Reviewed-by: Michael Brown <mikeb@cloudera.com> Reviewed-by: Matthew Jacobs <mj@cloudera.com> Tested-by: Internal Jenkins