Internal Materialized View - Load/Refresh and Assertion Failed

We have about 20 tables translated to 20 materialized view (internal with cache hint - /*+ cache(ttl:14400000) */). 2 dreaded behaviours:

1. On start up with application (application starts hitting app), certain query will cause ASSERTION FAILED
2. On reloading cache, teiid starts to fails with same behaviour.

2011-12-14 18:26:40,201 WARN [org.teiid.CONNECTOR] (Worker2228_QueryProcessorQueue1132419) Connector worker process failed for atomic-request=mCMnhhZ9fLcU.100.3.334092
[JDBCExecutionException] 0: Error Code:0 Message:'ASSERTION FAILED: expected reference to be not null' error executing statement(s):[....]
1 [TeiidSQLException]ASSERTION FAILED: expected reference to be not null
2 [TeiidException]ASSERTION FAILED: expected reference to be not null
3 [AssertionError]ASSERTION FAILED: expected reference to be not null
at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:90)
at org.teiid.dqp.internal.datamgr.ConnectorWorkItem.execute(ConnectorWorkItem.java:263)
at org.teiid.dqp.internal.process.DataTierTupleSource.getResults(DataTierTupleSource.java:281)
at org.teiid.dqp.internal.process.DataTierTupleSource.access$000(DataTierTupleSource.java:71)
at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:123)
at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:120)
at org.teiid.dqp.internal.process.DQPCore$FutureWork.run(DQPCore.java:107)
at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:188)
at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:116)
at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:290)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: org.teiid.jdbc.TeiidSQLException: ASSERTION FAILED: expected reference to be not null
at org.teiid.jdbc.TeiidSQLException.create(TeiidSQLException.java:109)
at org.teiid.jdbc.TeiidSQLException.create(TeiidSQLException.java:69)
at org.teiid.jdbc.StatementImpl.executeSql(StatementImpl.java:497)
at org.teiid.jdbc.PreparedStatementImpl.executeQuery(PreparedStatementImpl.java:214)
at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:342)
at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:86)
... 12 more
Caused by: [TeiidException]ASSERTION FAILED: expected reference to be not null
1 [AssertionError]ASSERTION FAILED: expected reference to be not null
at org.teiid.client.ResultsMessage.setException(ResultsMessage.java:177)
at org.teiid.dqp.internal.process.RequestWorkItem.sendError(RequestWorkItem.java:557)
at org.teiid.dqp.internal.process.RequestWorkItem.attemptClose(RequestWorkItem.java:335)
at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:218)
at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:49)
... 6 more
Caused by: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null
at org.teiid.core.util.Assertion.failed(Assertion.java:73)
at org.teiid.core.util.Assertion.isNotNull(Assertion.java:100)
at org.teiid.core.util.Assertion.isNotNull(Assertion.java:92)
at org.teiid.query.processor.relational.RelationalNode.getProjectionIndexes(RelationalNode.java:366)
at org.teiid.query.tempdata.TempTable$QueryTupleSource.<init>(TempTable.java:141)
at org.teiid.query.tempdata.TempTable$QueryTupleSource.<init>(TempTable.java:130)
at org.teiid.query.tempdata.TempTable.createTupleSource(TempTable.java:410)
at org.teiid.query.tempdata.TempTable.createTupleSource(TempTable.java:402)
at org.teiid.query.tempdata.TempTableDataManager.registerQuery(TempTableDataManager.java:437)
at org.teiid.query.tempdata.TempTableDataManager.registerRequest(TempTableDataManager.java:182)
at org.teiid.query.tempdata.TempTableDataManager.registerRequest(TempTableDataManager.java:170)
at org.teiid.query.processor.relational.AccessNode.registerRequest(AccessNode.java:197)
at org.teiid.query.processor.relational.AccessNode.open(AccessNode.java:118)
at org.teiid.query.processor.relational.RelationalNode.open(RelationalNode.java:250)
at org.teiid.query.processor.relational.JoinStrategy.openLeft(JoinStrategy.java:95)
at org.teiid.query.processor.relational.JoinNode.open(JoinNode.java:138)
at org.teiid.query.processor.relational.RelationalNode.open(RelationalNode.java:250)
at org.teiid.query.processor.relational.RelationalNode.open(RelationalNode.java:250)
at org.teiid.query.processor.relational.UnionAllNode.open(UnionAllNode.java:72)
at org.teiid.query.processor.relational.RelationalNode.open(RelationalNode.java:250)
at org.teiid.query.processor.relational.UnionAllNode.open(UnionAllNode.java:72)
at org.teiid.query.processor.relational.RelationalNode.open(RelationalNode.java:250)
at org.teiid.query.processor.relational.UnionAllNode.open(UnionAllNode.java:72)
at org.teiid.query.processor.relational.RelationalNode.open(RelationalNode.java:250)
at org.teiid.query.processor.relational.UnionAllNode.open(UnionAllNode.java:72)
at org.teiid.query.processor.relational.RelationalNode.open(RelationalNode.java:250)
at org.teiid.query.processor.relational.RelationalPlan.open(RelationalPlan.java:152)
at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:134)
at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:105)
at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:115)
at org.teiid.query.processor.relational.SubqueryAwareEvaluator.evaluateSubquery(SubqueryAwareEvaluator.java:129)
at org.teiid.query.eval.Evaluator.evaluate(Evaluator.java:445)
at org.teiid.query.eval.Evaluator.evaluateTVL(Evaluator.java:218)
at org.teiid.query.eval.Evaluator.evaluate(Evaluator.java:203)
at org.teiid.query.processor.relational.SelectNode.nextBatchDirect(SelectNode.java:102)
at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:274)
at org.teiid.query.processor.relational.ProjectNode.nextBatchDirect(ProjectNode.java:162)
at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:274)
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:82)
at org.teiid.common.buffer.AbstractTupleSource.nextTuple(AbstractTupleSource.java:48)
at org.teiid.query.processor.relational.SortUtility.initialSort(SortUtility.java:214)
at org.teiid.query.processor.relational.SortUtility.sort(SortUtility.java:168)
at org.teiid.query.processor.relational.SortNode.sortPhase(SortNode.java:96)
at org.teiid.query.processor.relational.SortNode.nextBatchDirect(SortNode.java:85)
at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:274)
at org.teiid.query.processor.relational.RelationalPlan.nextBatch(RelationalPlan.java:161)
at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:150)
at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:105)
at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:115)
at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:250)
at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:184)
... 7 more
2011-12-14 18:26:40,201 WARN [org.teiid.PROCESSOR] (Worker2205_QueryProcessorQueue1132421) Processing exception 'Error Code:0 Message:Error Code:0 Message:'ASSERTION FAILED: expected reference to be not null' error executing statement(s): [....] for request mCMnhhZ9fLcU.100. Exception type org.teiid.core.TeiidProcessingException thrown from org.teiid.core.util.Assertion.failed(Assertion.java:73). Enable more detailed logging to see the entire stacktrace.