[IMPALA-5562] Query involving nested array and limit 0 hits IllegalStateException

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 2.9.0
• Fix Version/s: Impala 2.10.0
• Component/s: Frontend
• Labels: regression
• Target Version: Impala 2.10.0
• Epic Color: ghx-label-7
• Assignee: Alexander Behm
• Reporter: Alexander Behm
• Created: 22/Jun/17 18:31
• Updated: 23/Jun/17 16:27
• Resolved: 23/Jun/17 16:27

Description

Queries involving nested collections (array and map) and limit 0 hit a Preconditions check.

explain select * from tpch_nested_parquet.customer c, c.c_orders limit 0;
ERROR: IllegalStateException: null

Stack:

I0622 11:26:44.929339 23672 jni-util.cc:176] java.lang.IllegalStateException
	at com.google.common.base.Preconditions.checkState(Preconditions.java:129)
	at org.apache.impala.analysis.TupleDescriptor.recomputeMemLayout(TupleDescriptor.java:239)
	at org.apache.impala.planner.SingleNodePlanner.unmarkCollectionSlots(SingleNodePlanner.java:242)
	at org.apache.impala.planner.SingleNodePlanner.createEmptyNode(SingleNodePlanner.java:217)
	at org.apache.impala.planner.SingleNodePlanner.createQueryPlan(SingleNodePlanner.java:252)
	at org.apache.impala.planner.SingleNodePlanner.createSingleNodePlan(SingleNodePlanner.java:149)
	at org.apache.impala.planner.Planner.createPlan(Planner.java:90)
	at org.apache.impala.service.Frontend.createExecRequest(Frontend.java:1008)
	at org.apache.impala.service.Frontend.createExecRequest(Frontend.java:1104)
	at org.apache.impala.service.JniFrontend.createExecRequest(JniFrontend.java:156)

Workaround
Use LIMIT 1 instead of LIMIT 0.