Assertion error with INTERSECT ------------------------------ Key: TEIID-2457 URL: https://issues.jboss.org/browse/TEIID-2457 Project: Teiid Issue Type: Bug Components: Query Engine Affects Versions: 8.3, 7.7.6 Reporter: Van Halbert Assignee: Steven Hawkins Priority: Critical Fix For: 8.4 A sample query which produced the error is: SELECT IntKey FROM BQT1.SmallA INTERSECT SELECT IntNum FROM BQT1.SmallB ORDER BY INTKEY How to reproduce: Run the query using a client such as Squirrel multiple times. The results varies from returning an Assertion to returning actual results. In my test I ran the query five times and it returned actual results twice and the Assertion 3 times. The Assertion can be seen below. 2013-04-03 16:00:42,190 ERROR [org.teiid.PROCESSOR] (Worker4_QueryProcessorQueue146) Unexpected exception for request JyDs6MZ6d9zG.24 java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null at org.teiid.core.util.Assertion.failed(Assertion.java:73) at org.teiid.core.util.Assertion.isNotNull(Assertion.java:100) at org.teiid.core.util.Assertion.isNotNull(Assertion.java:92) at org.teiid.common.buffer.TupleBuffer.getBatch(TupleBuffer.java:217) at org.teiid.common.buffer.TupleBuffer$1.getBatch(TupleBuffer.java:331) at org.teiid.common.buffer.AbstractTupleSource.getCurrentTuple(AbstractTupleSource.java:61) at org.teiid.common.buffer.AbstractTupleSource.hasNext(AbstractTupleSource.java:91) at org.teiid.query.processor.relational.MergeJoinStrategy.process(MergeJoinStrategy.java:163) at org.teiid.query.processor.relational.JoinNode.nextBatchDirect(JoinNode.java:212) at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:280) at org.teiid.query.processor.BatchIterator.finalRow(BatchIterator.java:70) at org.teiid.common.buffer.AbstractTupleSource.getCurrentTuple(AbstractTupleSource.java:69) at org.teiid.query.processor.BatchIterator.getCurrentTuple(BatchIterator.java:85) at org.teiid.common.buffer.AbstractTupleSource.nextTuple(AbstractTupleSource.java:48) at org.teiid.query.processor.relational.SortUtility.initialSort(SortUtility.java:248) at org.teiid.query.processor.relational.SortUtility.sort(SortUtility.java:185) at org.teiid.query.processor.relational.SortNode.sortPhase(SortNode.java:99) at org.teiid.query.processor.relational.SortNode.nextBatchDirect(SortNode.java:88) at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:280) at org.teiid.query.processor.relational.LimitNode.nextBatchDirect(LimitNode.java:100) at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:280) at org.teiid.query.processor.relational.RelationalPlan.nextBatch(RelationalPlan.java:176) at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:139) at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:105) at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:147) at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:375) at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:288) at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:49) at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:216) at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:244) at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:122) at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:292) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722)