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https://issues.apache.org/jira/browse/HIVE-13369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-13369:
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Assignee: Wei Zheng (was: Eugene Koifman)
> AcidUtils.getAcidState() is not paying attention toValidTxnList when choosing
> the "best" base file
> --------------------------------------------------------------------------------------------------
>
> Key: HIVE-13369
> URL: https://issues.apache.org/jira/browse/HIVE-13369
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Affects Versions: 1.0.0
> Reporter: Eugene Koifman
> Assignee: Wei Zheng
> Priority: Blocker
>
> The JavaDoc on getAcidState() reads, in part:
> "Note that because major compactions don't
> preserve the history, we can't use a base directory that includes a
> transaction id that we must exclude."
> which is correct but there is nothing in the code that does this.
> And if we detect a situation where txn X must be excluded but and there are
> deltas that contain X, we'll have to aborted the txn. This can't
> (reasonably) happen with auto commit mode, but with multi statement txns it's
> possible.
> Suppose some long running txn starts and lock in snapshot at 17 (HWM). An
> hour later it decides to access some partition for which all txns < 20 (for
> example) have already been compacted (i.e. GC'd).
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