[HIVE-7992] StatsRulesProcFactory should gracefully handle overflows - ASF JIRA

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Details

Type: Sub-task
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: 0.13.1
Fix Version/s: 0.14.0
Component/s: Statistics
Labels:
None

Description

When StatsRulesProcFactory overflows it sets data size to 0 and as a result the Vertex will ask for a single task, this results in a fairly slow running query, most likely the overflow is a result of higher than usual number of rows.

The class should detect an overflow and set a flag when an overflow occurs, if an overflow occurs StatsRulesProcFactory should request the maximum number of tasks for the vertex.