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https://issues.apache.org/jira/browse/HBASE-8197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615599#comment-13615599
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Jonathan Hsieh commented on HBASE-8197:
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[~jmspaggi] from the reaction, it sounds like this may be something only in
hadoop2 (which I run/test on top of). If you run this on hbase+hadoop1 do you
get the "loaded from" info?
> Cannot distinguish between HBase default config value and client overridden
> config value
> ----------------------------------------------------------------------------------------
>
> Key: HBASE-8197
> URL: https://issues.apache.org/jira/browse/HBASE-8197
> Project: HBase
> Issue Type: Bug
> Components: Usability
> Affects Versions: 0.94.6
> Reporter: James Taylor
> Priority: Minor
>
> By HBase setting default values in hbase-default.xml, it makes it difficult
> for a platform to know if a value has been overridden by the client. For
> example, Phoenix has a default value it would like to use for
> hbase.client.scanner.caching. I'd like to be able to call config.setIfUnset
> option to use our default value if a client hasn't already provided their
> own. Since HBase sets this in hbase-default.xml to 1, I can't differentiate
> between the client have a value in their hbase-sites.xml as 1 versus the
> default value we're getting from HBase.
> Wouldn't it be better if HBase had constants defined in a Java interface that
> would be used by HBase as the default value if none other is provided, like
> this:
> config.getInt("hbase.client.scanner.caching",
> HBaseDefault.CLIENT_SCANNER_CACHING);
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