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https://issues.apache.org/jira/browse/HBASE-8197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615617#comment-13615617
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Jean-Marc Spaggiari commented on HBASE-8197:
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Here is what I'm getting from 0.94.6 + Hadoop 1.0.3
{code}
hbase@node3:~/hbase-0.94.6$ bin/hbase org.apache.hadoop.hbase.HBaseConfiguration
<?xml version="1.0" encoding="UTF-8" standalone="no"?><configuration>
<property><name>hbase.online.schema.update.enable</name><value>false</value></property>
<property><name>fs.s3n.impl</name><value>org.apache.hadoop.fs.s3native.NativeS3FileSystem</value></property>
<property><name>hbase.master.port</name><value>60000</value></property>
<property><name>hbase.hstore.compaction.max</name><value>10</value></property>
{code}
> 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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