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https://issues.apache.org/jira/browse/HDFS-12701?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Weiwei Yang updated HDFS-12701:
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Description: When cluster is heavily loaded and short-circuit read is
enabled, we found HBase regionserver handlers are often blocked by
{{ShortCircuitCache}}. Dumped jstack and found more lots of thread waiting on
obtain the cache lock. It should be able to be improved by using more
fine-grained locks to improve the performance. (was: When cluster is heavily
loaded, we found HBase regionserver handlers are often blocked by
{{ShortCircuitCache}}. Dumped jstack and found more lots of thread waiting on
obtain the cache lock. It should be able to be improved by using more
fine-grained locks to improve the performance.)
> More fine-grained locks in ShortCircuitCache
> --------------------------------------------
>
> Key: HDFS-12701
> URL: https://issues.apache.org/jira/browse/HDFS-12701
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 3.0.0-beta1, 2.8.1
> Reporter: Weiwei Yang
>
> When cluster is heavily loaded and short-circuit read is enabled, we found
> HBase regionserver handlers are often blocked by {{ShortCircuitCache}}.
> Dumped jstack and found more lots of thread waiting on obtain the cache lock.
> It should be able to be improved by using more fine-grained locks to improve
> the performance.
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