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https://issues.apache.org/jira/browse/HIVE-20823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman reassigned HIVE-20823:
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> Make Compactor run in a transaction
> -----------------------------------
>
> Key: HIVE-20823
> URL: https://issues.apache.org/jira/browse/HIVE-20823
> Project: Hive
> Issue Type: Improvement
> Components: Transactions
> Affects Versions: 3.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Major
>
> Have compactor open a transaction and run the job in that transaction.
> # make compactor produced base/delta include this txn id in the folder name,
> e.g. base_7_c17 where 17 is the txnid.
> # add {{CQ_TXN_ID bigint}} to COMPACTION_QUEUE and COMPLETED_COMPACTIONS to
> record this txn id
> # make sure {{AcidUtils.getAcidState()}} pays attention to this transaction
> on read and ignores this dir if this txn id is not committed in the current
> snapshot
> ## this means not only validWriteIdList but ValidTxnIdList should be passed
> along in config (if it isn't yet)
> # once this is done, {{CompactorMR.createCompactorMarker()}} can be
> eliminated and {{AcidUtils.isValidBase}} modified accordingly
> # modify Cleaner so that it doesn't clean old files until new file is visible
> to all readers
> #
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