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https://issues.apache.org/jira/browse/HDFS-16090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16090 started by Viraj Jasani.
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> Fine grained locking for datanodeNetworkCounts
> ----------------------------------------------
>
> Key: HDFS-16090
> URL: https://issues.apache.org/jira/browse/HDFS-16090
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> While incrementing DataNode network error count, we lock entire LoadingCache
> in order to increment network count of specific host. We should provide fine
> grained concurrency for this update because locking entire cache is redundant
> and could impact performance while incrementing network count for multiple
> hosts.
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