Prefetch exception with small fetch size ---------------------------------------- Key: TEIID-2525 URL: https://issues.jboss.org/browse/TEIID-2525 Project: Teiid Issue Type: Bug Affects Versions: 8.4, 7.7.7 Reporter: Filip Nguyen Assignee: Steven Hawkins Priority: Critical Labels: 8.4CR2 Fix For: 8.4 Doesn't work both in the newest Teiid and the 7.x version. Not sure how critical this is. When setting the prefetch via JDBC and using FORWARD_ONLY result set [1] I am getting exceptions [2]. I run the query on oracle (select * from XYZ limit 11). {code:java} TeiidDataSource ds = new TeiidDataSource(); ds.setDatabaseName(vdb); ds.setUser("user"); ds.setPassword("user"); ds.setServerName(host); ds.setPortNumber(Integer.valueOf(port)); ds.setFetchSize(10); .... Statement statement = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY); {code} [2] {code:java} Eorg.teiid.jdbc.TeiidSQLException: ASSERTION FAILED: expected reference to be not null at org.teiid.jdbc.TeiidSQLException.create(TeiidSQLException.java:113) at org.teiid.jdbc.TeiidSQLException.create(TeiidSQLException.java:70) at org.teiid.jdbc.ResultSetImpl.processBatch(ResultSetImpl.java:402) at org.teiid.jdbc.ResultSetImpl.requestBatch(ResultSetImpl.java:375) at org.teiid.jdbc.BatchResults.requestBatchAndWait(BatchResults.java:226) at org.teiid.jdbc.BatchResults.requestNextBatch(BatchResults.java:141) at org.teiid.jdbc.BatchResults.hasNext(BatchResults.java:252) at org.teiid.jdbc.ResultSetImpl.hasNext(ResultSetImpl.java:439) at org.teiid.jdbc.ResultSetImpl.next(ResultSetImpl.java:251) at JDBCClient.execute(JDBCClient.java:90) at JDBCClient.main(JDBCClient.java:45) Caused by: org.teiid.core.TeiidException: ASSERTION FAILED: expected reference to be not null at org.teiid.client.ResultsMessage.setException(ResultsMessage.java:202) at org.teiid.dqp.internal.process.RequestWorkItem.sendError(RequestWorkItem.java:955) at org.teiid.dqp.internal.process.RequestWorkItem.close(RequestWorkItem.java:543) at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:346) at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:51) at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:248) at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:269) at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:214) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) Caused by: 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:305) at org.teiid.dqp.internal.process.RequestWorkItem.sendResultsIfNeeded(RequestWorkItem.java:782) at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:462) at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:320) {code}