[
https://issues.apache.org/jira/browse/HBASE-21596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16743354#comment-16743354
]
stack commented on HBASE-21596:
-------------------------------
bq. The problem is that the memstore scan filter logic for versions only counts
the amount of cells it has read so far, then once the VERSIONS limit has
reached, it just skips the remaining cells. So once we put a delete marker on
the latest cell version, that cell will not be accounted, then oldest versions
that should had disappeared will now pop up on the scan results.
This would seem to argue that we should not allow explicit delete of a single
Cell version -- we should always delete all behind the tombstone? A point
delete could always revive the Cell that was just outside the version window --
at least until the major compaction runs?
> HBase Shell "delete" command can cause older versions to be shown even if
> VERSIONS is configured as 1
> -----------------------------------------------------------------------------------------------------
>
> Key: HBASE-21596
> URL: https://issues.apache.org/jira/browse/HBASE-21596
> Project: HBase
> Issue Type: Bug
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Minor
> Attachments: HBASE-21596-master.001.patch,
> HBASE-21596-master.002.patch, HBASE-21596-master.003.patch, initial-patch.txt
>
>
> HBase Shell delete command is supposed to operate over an specific TS. If no
> TS is informed, it will assume the latest TS for the cell and put delete
> marker for it.
> However, for a CF with VERSIONS => 1, if multiple puts were performed for
> same cell, there may be multiple cell versions on the memstore, so delete
> would only be "delete marking" one of those, and causing the most recent no
> marked one to be shown on gets/scans, which then contradicts the CF "VERSIONS
> => 1" configuration.
> This issue is not seen with deleteall command or using Delete operation from
> Java API.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
