[DRILL-7414] EVF incorrectly sets buffer writer index after rollover - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Minor
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 1.17.0
Component/s: None
Labels:
- ready-to-commit

Description

A full test run, with vector validation enabled and with the "new" scan enabled, revealed the following in TestMockPlugin.testSizeLimit():

comments_s20000 - VarCharVector: Row count = 838, but value count = 839

Adding vector validation to the result set loader overflow tests reveals that the problem is in overflow. In TestResultSetLoaderOverflow.testOverflowWithNullables():

a - RepeatedIntVector: Row count = 2952, but value count = 2953
b - RepeatedVarCharVector: Row count = 2952, but value count = 2953
b - RepeatedVarCharVector: Vector has 2953 values, but offset vector labels 32472 values
c - RepeatedIntVector: Row count = 2952, but value count = 2953
d - RepeatedIntVector: Row count = 2952, but value count = 2953

The problem is that EVF incorrectly sets the offset buffer writer index after a rollover.