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https://issues.apache.org/jira/browse/HBASE-25449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17261583#comment-17261583
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Josh Elser commented on HBASE-25449:
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Tested this on branch-2 and master, locally, just to make sure the metrics from
HBASE-8868 align. branch-2.4 works fine (with Hadoop 3.1.2), but master looks a
little weird. I'm not entirely convinced it's a problem – it may just be us
being smarter and I've not yet caught up. I was able to observe
shortCircuitBytesRead in the logs with master, so I believe the config is
correct in that respect (and something is just happening that obviates any read
from HDFS).
Either way, pushing this now.
> '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
>
> 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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