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https://issues.apache.org/jira/browse/HBASE-23832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17101621#comment-17101621
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Anoop Sam John commented on HBASE-23832:
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This is a BC break for the config name. Old configs will not get honored. We
should apply this patch to all active 2.x versions. ping [~zhangduo],
[~stack], [~zghao]
> Old config hbase.hstore.compactionThreshold is ignored
> ------------------------------------------------------
>
> Key: HBASE-23832
> URL: https://issues.apache.org/jira/browse/HBASE-23832
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Anoop Sam John
> Assignee: Sambit Mohapatra
> Priority: Major
>
> In 2.x we added new name 'hbase.hstore.compaction.min' for this. Still for
> compatibility we allow the old config name and honor that in code
> {code}
> minFilesToCompact = Math.max(2, conf.getInt(HBASE_HSTORE_COMPACTION_MIN_KEY,
> /*old name*/ conf.getInt("hbase.hstore.compactionThreshold", 3)));
> {code}
> But if hbase.hstore.compactionThreshold alone is configured by user, there is
> no impact of that.
> This is because in hbase-default.xml we have the new config with a value of
> 3. So the call conf.getInt(HBASE_HSTORE_COMPACTION_MIN_KEY) always return a
> value 3 even if it is not explicitly configured by customer and instead used
> the old key.
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