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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-12910] clear thread-local shardconnection cache in mongos after every operation</title>
                <link>https://jira.mongodb.org/browse/SERVER-12910</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;See server.cpp::process().&lt;/p&gt;

&lt;p&gt;Currently we clear the shardconnection cache after every request that gets a response.  This is now too conservative, since write ops are upconverted to use batch write commands and do not require the same connections stay open to enforce GLE.  We should clear the thead-local cache after &lt;b&gt;every&lt;/b&gt; operation.&lt;/p&gt;

&lt;p&gt;Impact is small in a cluster which isn&apos;t doing up/downconversion, but we want to be consistent and easy to reason about.&lt;/p&gt;</description>
                <environment></environment>
        <key id="114889">SERVER-12910</key>
            <summary>clear thread-local shardconnection cache in mongos after every operation</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="greg_10gen">Greg Studer</assignee>
                                    <reporter username="greg_10gen">Greg Studer</reporter>
                        <labels>
                    </labels>
                <created>Wed, 26 Feb 2014 16:31:42 +0000</created>
                <updated>Mon, 11 Jul 2016 17:18:05 +0000</updated>
                            <resolved>Tue, 4 Mar 2014 20:36:19 +0000</resolved>
                                                    <fixVersion>2.6.0-rc1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="509333" author="xgen-internal-githook" created="Tue, 4 Mar 2014 20:35:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;gregstuder&apos;, u&apos;name&apos;: u&apos;Greg Studer&apos;, u&apos;email&apos;: u&apos;greg@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12910&quot; title=&quot;clear thread-local shardconnection cache in mongos after every operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12910&quot;&gt;&lt;del&gt;SERVER-12910&lt;/del&gt;&lt;/a&gt; release conns back to pool after every mongos operation&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/db0c430fe28d4f82e9b7b6fff41037d4d24c73a3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/db0c430fe28d4f82e9b7b6fff41037d4d24c73a3&lt;/a&gt;&lt;/p&gt;</comment>
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