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https://issues.apache.org/jira/browse/HBASE-21504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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xuming updated HBASE-21504:
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Description: When i use FIFOCompactionPolicy, and if all hfiles(>1) are TTL
expired in a region, once we do a compaction on the region, the compaction
policy will select the latest hfile to do compaction.But beacuse the latest
hfile is already TTL expired, compactor only write a "empty" hfile(whose entry
counter is 0 and maxTimeStamp is Long.MAX_VALUE) finally. Because maxTimeStamp
is long max, so the "empty" hfile will never be TTL expired, more seriously we
can not archive it by FIFOCompactionPolicy forever. (was: When i use
FIFOCompactionPolicy, and if all hfiles(>1) are TTL expired in a region, once
we do a compaction on the region, the compaction policy will select the latest
hfile to do compaction.But beacuse the latest hfile is already TTL expired,
compactor only write a "empty" hfile(whose entry counter is 0 and maxTimeStamp
is Long.MAX_VALUE) finally. Because maxTimeStamp is long max, so the "empty"
hfile will never be TTL expired, More seriously we can not archive it by
FIFOCompactionPolicy forever.)
> If enable FIFOCompactionPolicy, a compaction may write a new hfile whose
> maxTimeStamp is Long.MAX_VALUE. This kind of hfile will never be archived by
> FIFOCompactionPolicy
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-21504
> URL: https://issues.apache.org/jira/browse/HBASE-21504
> Project: HBase
> Issue Type: Bug
> Components: Compaction
> Affects Versions: 2.1.0
> Reporter: xuming
> Priority: Critical
> Attachments: 1.patch
>
>
> When i use FIFOCompactionPolicy, and if all hfiles(>1) are TTL expired in a
> region, once we do a compaction on the region, the compaction policy will
> select the latest hfile to do compaction.But beacuse the latest hfile is
> already TTL expired, compactor only write a "empty" hfile(whose entry counter
> is 0 and maxTimeStamp is Long.MAX_VALUE) finally. Because maxTimeStamp is
> long max, so the "empty" hfile will never be TTL expired, more seriously we
> can not archive it by FIFOCompactionPolicy forever.
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