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https://issues.apache.org/jira/browse/IMPALA-9045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy resolved IMPALA-9045.
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Fix Version/s: Impala 3.4.0
Resolution: Fixed
> Filter base directories of open/aborted compactions
> ---------------------------------------------------
>
> Key: IMPALA-9045
> URL: https://issues.apache.org/jira/browse/IMPALA-9045
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 3.3.0
> Reporter: Csaba Ringhofer
> Assignee: Zoltán Borók-Nagy
> Priority: Critical
> Labels: impala-acid
> Fix For: Impala 3.4.0
>
>
> Major compactions creates directories in base_writeid_visibilityTxnId, which
> expresses that it contains all deltas +bases <= writeId, and that the
> compaction's transaction is visibilityTxnId. visibilityTxnId is needed to
> check whether the compaction is open/aborted/committed, and base directories
> belonging to open/aborted compactions should be ignored.
> Currently Impala only checks the writeId, so if there is an open/aborted
> compaction, it will be used as base, and base/delta directories with smaller
> writeIds will be ignored, leading to potential data loss.
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