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https://issues.apache.org/jira/browse/ACCUMULO-4458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15491817#comment-15491817
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Sean Busbey commented on ACCUMULO-4458:
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yeah, I was confused for awhile about what was going on with zooCache, since it
was static but was initialized in the constructor of the singleton. Eventually
decided it just must have been a mistake.
> lock contention around configuration settings impacts tablet server
> performance
> -------------------------------------------------------------------------------
>
> Key: ACCUMULO-4458
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4458
> Project: Accumulo
> Issue Type: Bug
> Components: tserver
> Affects Versions: 1.7.1, 1.8.0
> Reporter: Sean Busbey
> Assignee: Sean Busbey
> Priority: Critical
> Fix For: 1.7.3, 1.8.1, 2.0.0
>
> Attachments: ACCUMULO-4458-1.7.v1.patch
>
>
> While investigating a pretty severe performance regression comparing YCSB
> against 1.6 and 1.7, I found a fair bit of lock contention around getting
> configuration values. This was improved by ACCUMULO-4388, but various threads
> eventually all started contending on the configuration values expected from
> the site xml files.
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