NPE with a join and a dup_remove child -------------------------------------- Key: TEIID-2946 URL: https://issues.jboss.org/browse/TEIID-2946 Project: Teiid Issue Type: Bug Components: Query Engine Affects Versions: 8.7 Reporter: Steven Hawkins Assignee: Steven Hawkins Priority: Critical Fix For: 8.7.1, 8.8 A plan structure such as: {code} JoinNode ... [CROSS JOIN] ... SortNode ... [DUP_REMOVE] {code} Will cause an NPE during prefetch: {code} 28 Apr 2014 05:35:28,574 ERROR [org.teiid.PROCESSOR] (http-CA31/141.202.65.31:30804-2) eA83y/9ZGnji TEIID30019 Unexpected exception for request eA83y/9ZGnji.6: java.lang.NullPointerException at org.teiid.query.processor.relational.SourceState.prefetch(SourceState.java:203) at org.teiid.query.processor.relational.JoinNode.prefetch(JoinNode.java:231) at org.teiid.query.processor.relational.JoinNode.nextBatchDirect(JoinNode.java:223) {code} This is an oversight in that we generally are expecting an equi-join (which would incorporate the dup removal processing) or marking the dup remove as dup remove sort (the fully blocking variant).