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https://issues.apache.org/jira/browse/ACCUMULO-4458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15494470#comment-15494470
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Sean Busbey edited comment on ACCUMULO-4458 at 9/15/16 8:41 PM:
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{quote}
bq. If we want to do that, it's simpler to just not keep around / use the
underlying Hadoop Configuration object and default to the parent config for
anything that's not in the cached hashmap. I'll push this and then make a
follow on to give that a try.
It's not clear that was attempted yet... but I think it's the right way to go.
{quote}
I'll link the follow on jira here once I file it. I was waiting until I
finished merging. The earlier discussion about the use of SiteConfiguration#set
covers why I didn't do it here.
was (Author: busbey):
{quote}
bq. If we want to do that, it's simpler to just not keep around / use the
underlying Hadoop Configuration object and default to the parent config for
anything that's not in the cached hashmap. I'll push this and then make a
follow on to give that a try.
It's not clear that was attempted yet... but I think it's the right way to go.
{quote}
> 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
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> 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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