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https://issues.apache.org/jira/browse/HIVE-17296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16127719#comment-16127719
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Eugene Koifman commented on HIVE-17296:
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ORC-228 is in ORC 1.5. Note that MemoryManager is a ThreadLocal so changing
this property may affect other tests.
See if this will actually work before backporting
> Acid tests with multiple splits
> -------------------------------
>
> Key: HIVE-17296
> URL: https://issues.apache.org/jira/browse/HIVE-17296
> Project: Hive
> Issue Type: Test
> Components: Transactions
> Affects Versions: 3.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Critical
>
> data files in an Acid table are ORC files which may have multiple stripes
> for such files in base/ or delta/ (and original files with non acid to acid
> conversion) are split by OrcInputFormat into multiple (stripe sized) chunks.
> There is additional logic in in OrcRawRecordMerger
> (discoverKeyBounds/discoverOriginalKeyBounds) that is not tested by any E2E
> tests since none of the have enough data to generate multiple stripes in a
> single file.
> testRecordReaderOldBaseAndDelta/testRecordReaderNewBaseAndDelta/testOriginalReaderPair
> in TestOrcRawRecordMerger has some logic to test this but it really needs e2e
> tests.
> With ORC-228 it will be possible to write such tests.
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