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https://issues.apache.org/jira/browse/DRILL-7414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16955635#comment-16955635
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ASF GitHub Bot commented on DRILL-7414:
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paul-rogers commented on pull request #1878: DRILL-7414: EVF incorrectly sets
buffer writer index after rollover
URL: https://github.com/apache/drill/pull/1878
Enabling the vector validator on the "new" scan operator, in cases in which
overflow occurs, identified that the DrillBuf writer index was not properly set
for repeated vectors.
Enables such checking, adds unit tests, and fixes the writer index issue.
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> EVF incorrectly sets buffer writer index after rollover
> -------------------------------------------------------
>
> Key: DRILL-7414
> URL: https://issues.apache.org/jira/browse/DRILL-7414
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Minor
>
> A full test run, with vector validation enabled and with the "new" scan
> enabled, revealed the following in {{TestMockPlugin.testSizeLimit()}}:
> {noformat}
> comments_s20000 - VarCharVector: Row count = 838, but value count = 839
> {noformat}
> Adding vector validation to the result set loader overflow tests reveals that
> the problem is in overflow. In
> {{TestResultSetLoaderOverflow.testOverflowWithNullables()}}:
> {noformat}
> 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
> {noformat}
> The problem is that EVF incorrectly sets the offset buffer writer index after
> a rollover.
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