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https://issues.apache.org/jira/browse/SOLR-4509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15222992#comment-15222992
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Uwe Schindler commented on SOLR-4509:
-------------------------------------
Hi [~markrmil...@gmail.com],
I committed a fix for 3 tests that now leaked SolrClients in static fields,
which made the test leak detector angry on Java 9's module system (it tried to
measure private, internal classes). If this is backported, please also backport
my fix.
> Move to non deprecated HttpClient impl classes to remove stale connection
> check on every request and move connection lifecycle management towards the
> client.
> -------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-4509
> URL: https://issues.apache.org/jira/browse/SOLR-4509
> Project: Solr
> Issue Type: Improvement
> Environment: 5 node SmartOS cluster (all nodes living in same global
> zone - i.e. same physical machine)
> Reporter: Ryan Zezeski
> Assignee: Mark Miller
> Priority: Minor
> Fix For: master
>
> Attachments:
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch,
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch,
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch,
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch,
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch,
> 0001-SOLR-4509-Move-to-non-deprecated-HttpClient-impl-cla.patch,
> IsStaleTime.java, SOLR-4509-4_4_0.patch, SOLR-4509.patch, SOLR-4509.patch,
> SOLR-4509.patch, SOLR-4509.patch, SOLR-4509.patch, SOLR-4509.patch,
> SOLR-4509.patch, SOLR-4509.patch, SOLR-4509.patch,
> baremetal-stale-nostale-med-latency.dat,
> baremetal-stale-nostale-med-latency.svg,
> baremetal-stale-nostale-throughput.dat, baremetal-stale-nostale-throughput.svg
>
>
> By disabling the Apache HTTP Client stale check I've witnessed a 2-4x
> increase in throughput and reduction of over 100ms. This patch was made in
> the context of a project I'm leading, called Yokozuna, which relies on
> distributed search.
> Here's the patch on Yokozuna: https://github.com/rzezeski/yokozuna/pull/26
> Here's a write-up I did on my findings:
> http://www.zinascii.com/2013/solr-distributed-search-and-the-stale-check.html
> I'm happy to answer any questions or make changes to the patch to make it
> acceptable.
> ReviewBoard: https://reviews.apache.org/r/28393/
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