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https://issues.apache.org/jira/browse/HBASE-25449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Elser resolved HBASE-25449.
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Hadoop Flags: Reviewed
Release Note: The presence of HDFS short-circuit read configuration
properties in hbase-default.xml inadvertently causes short-circuit reads to not
happen inside of RegionServers, despite short-circuit reads being enabled in
hdfs-site.xml.
Resolution: Fixed
Thanks for a great fix (and test), [~shenshengli]!
> 'dfs.client.read.shortcircuit' should not be set in hbase-default.xml
> ---------------------------------------------------------------------
>
> Key: HBASE-25449
> URL: https://issues.apache.org/jira/browse/HBASE-25449
> Project: HBase
> Issue Type: Improvement
> Components: conf
> Affects Versions: 2.0.1
> Reporter: shenshengli
> Assignee: shenshengli
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.2.7, 2.5.0, 2.4.1, 2.3.5
>
>
> I think this parameter is not suitable for in hbase-default.xml, because in
> this case, HDFS explicitly set to "dfs.client.read.shortcircuit=true", hbase
> rely on HDFS configuration, the parameters in hbase service still is
> false.Must be explicitly in hbase-site.xml is set to
> "dfs.client.read.shortcircuit=true" to take effect.
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