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https://issues.apache.org/jira/browse/HBASE-8760?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matteo Bertozzi updated HBASE-8760:
-----------------------------------
Attachment: HBASE-8760-v4.patch
HBASE-8760-0.94-v4.patch
v4 should be the final one.
easy way to test this stuff put a return null inside the HStore.compaction() to
avoid compactions. Then run the stuff above in the hbase shell to create a
table, snapshot, clone and a clone of clone.. Then remove the original table
and way the archiver to do the job. Play with enable/disable to test the load
unload cloned table and verify that the files are still readable. Also check
the /hbase dir to look if all the expected files are there.
I'm not able to constantly reproduce the HFileLink problem and I haven't seen
the problem after this patch, but the symptom was an exception during the
enable of a cloned table with a link resolving to /hbase/.data/tableName
instead of /hbase/.data/default/tableName, basically the "dafault" namespace
dir was not there. Anyway this will be another jira
> possible loss of data in snapshot taken after region split
> ----------------------------------------------------------
>
> Key: HBASE-8760
> URL: https://issues.apache.org/jira/browse/HBASE-8760
> Project: HBase
> Issue Type: Bug
> Components: snapshots
> Affects Versions: 0.94.8, 0.95.1
> Reporter: Jerry He
> Fix For: 0.98.0, 0.95.2, 0.94.12
>
> Attachments: HBase-8760-0.94.8.patch, HBase-8760-0.94.8-v1.patch,
> HBASE-8760-0.94-v4.patch, HBASE-8760-thz-v0.patch, HBASE-8760-thz-v1.patch,
> HBASE-8760-thz-v2.patch, HBASE-8760-thz-v3.patch, HBASE-8760-v4.patch
>
>
> Right after a region split but before the daughter regions are compacted, we
> have two daughter regions containing Reference files to the parent hfiles.
> If we take snapshot right at the moment, the snapshot will succeed, but it
> will only contain the daughter Reference files. Since there is no hold on the
> parent hfiles, they will be deleted by the HFile Cleaner after they are no
> longer needed by the daughter regions soon after.
> A minimum we need to do is the keep these parent hfiles from being deleted.
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