Details
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Bug
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Status: Resolved
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Critical
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Resolution: Duplicate
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Impala 2.9.0
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None
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ghx-label-4
Description
This seems similar to IMPALA-5125, but in this bug, we hit a Java NPE and error, not a DCHECK, so I think it's important to file this separately for now, since some path is different.
query:
EXPLAIN SELECT IF(false, AVG(id), -1) FROM functional.alltypestiny;
I0413 14:32:19.962172 9649 jni-util.cc:176] java.lang.NullPointerException
at org.apache.impala.analysis.Analyzer.getEquivClasses(Analyzer.java:1781)
at org.apache.impala.analysis.Analyzer.createEquivConjuncts(Analyzer.java:1744)
at org.apache.impala.planner.AggregationNode.init(AggregationNode.java:147)
at org.apache.impala.planner.SingleNodePlanner.createAggregationPlan(SingleNodePlanner.java:892)
at org.apache.impala.planner.SingleNodePlanner.createSelectPlan(SingleNodePlanner.java:616)
at org.apache.impala.planner.SingleNodePlanner.createQueryPlan(SingleNodePlanner.java:254)
at org.apache.impala.planner.SingleNodePlanner.createSingleNodePlan(SingleNodePlanner.java:147)
at org.apache.impala.planner.Planner.createPlan(Planner.java:87)
at org.apache.impala.service.Frontend.createExecRequest(Frontend.java:1012)
at org.apache.impala.service.Frontend.createExecRequest(Frontend.java:1103)
at org.apache.impala.service.JniFrontend.createExecRequest(JniFrontend.java:155)
Just like with IMPALA-5125, using set enable_expr_rewrites=false is a workaround. Just like with IMPALA-5125, including GROUP BY looks OK.
twmarshall can you take the first look? I'm going under the assumption that this is a dupe of IMPALA-5125 based on RCA, or at least meta-similar. Again, though, different effect (no crash) means at least initially a separate bug. Thanks.