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  1. Teiid
  2. TEIID-4861

ASSERTION FAILED: expected reference to be not null

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      Description

      I have a vdb containing a multi-source schema (channel) and a single source schema (ops). The following query which uses an aggregate function and groups by both a mulit-source column and a single source column causes the error "TEIID30019 Unexpected exception for request l1HvA1r84nyA.0: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null" and a stack trace which looks quite similar to that in TEIID-4325:

      select s.channel, m.user_name, count(*)
      from channel.dbo.service_request s
      	join ops.dbo.manager m
      		on s.staff_id = m.manager_id
      group by s.channel, m.user_name;
      

      Apr 15 20:09:52 localhost docker[27044]: 2017-04-16 01:09:52,237 ERROR [org.teiid.PROCESSOR] (Worker2_QueryProcessorQueue7) l1HvA1r84nyA TEIID30019 Unexpected exception for request l1HvA1r84nyA.0: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.core.util.Assertion.failed(Assertion.java:73)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.core.util.Assertion.isNotNull(Assertion.java:100)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.core.util.Assertion.isNotNull(Assertion.java:92)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalNode.getProjectionIndexes(RelationalNode.java:367)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.JoinNode.initialize(JoinNode.java:133)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:96)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:102)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:102)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:102)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.initialize(RelationalPlan.java:91)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.QueryProcessor.init(QueryProcessor.java:226)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:138)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:114)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:164)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:146)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:477)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:349)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:51)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:275)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:282)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119)
      Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:210)
      Apr 15 20:09:52 localhost docker[27044]: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      Apr 15 20:09:52 localhost docker[27044]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      Apr 15 20:09:52 localhost docker[27044]: at java.lang.Thread.run(Thread.java:745)

      Interestingly, if I narrow the query down to specific channels the error goes away:

      select s.channel, m.user_name, count(*)
      from channel.dbo.service_request s
      	join ops.dbo.manager m
      		on s.staff_id = m.manager_id
      where channel in ('oak', 'cypress')
      group by s.channel, m.user_name;
      

      I will attach both query plans.

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              • Assignee:
                shawkins Steven Hawkins
                Reporter:
                traivor Harold Campbell
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                  Updated:
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