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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-47975] Optimize ScopedShardVersionCriticalSection in order to avoid convoy on SSV after a shardVersion change</title>
                <link>https://jira.mongodb.org/browse/SERVER-47975</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Optimize ScopedShardVersionCriticalSection class with respect to multi-thread initialization. In particular in the case where a lot of threads try to concurrently instantiate this object.&lt;/p&gt;

&lt;p&gt;The idea is to avoid entering in the critical session if it is not strictly needed.&lt;/p&gt;

&lt;p&gt;&#160;&lt;br/&gt;
Modify &lt;a href=&quot;https://github.com/mongodb/mongo/blob/736bf1bca376a50dbd038098baf0a2f6ace29db7/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L60&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;onShardVersionMismatch&lt;/a&gt; in order to:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Wait on an ongoing shard version refresh or trigger it with a&#160;&lt;a href=&quot;http://exhttps//github.com/mongodb/mongo/blob/736bf1bca376a50dbd038098baf0a2f6ace29db7/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L210ample.com&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;forceShardFilteringMetadataRefresh&lt;/a&gt; call&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Update &lt;a href=&quot;http://exhttps//github.com/mongodb/mongo/blob/736bf1bca376a50dbd038098baf0a2f6ace29db7/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L210ample.com&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;forceShardFilteringMetadataRefresh&lt;/a&gt;:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Remove &lt;em&gt;forceRefreshFromThisThread&lt;/em&gt; flag&lt;/li&gt;
	&lt;li&gt;&lt;font color=&quot;#000000&quot;&gt;Remove unused &lt;em&gt;hasAdditionalCatalogCacheForFiltering&lt;/em&gt; part&lt;/font&gt;&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1341881">SERVER-47975</key>
            <summary>Optimize ScopedShardVersionCriticalSection in order to avoid convoy on SSV after a shardVersion change</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</assignee>
                                    <reporter username="tommaso.tocci@mongodb.com">Tommaso Tocci</reporter>
                        <labels>
                            <label>PM-1645-Milestone-1</label>
                    </labels>
                <created>Wed, 6 May 2020 14:15:42 +0000</created>
                <updated>Sun, 29 Oct 2023 22:08:38 +0000</updated>
                            <resolved>Tue, 26 May 2020 19:23:03 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3107375" author="xgen-internal-githook" created="Tue, 26 May 2020 17:23:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47975&quot; title=&quot;Optimize ScopedShardVersionCriticalSection in order to avoid convoy on SSV after a shardVersion change&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47975&quot;&gt;&lt;del&gt;SERVER-47975&lt;/del&gt;&lt;/a&gt; Optimize ScopedShardVersionCriticalSection in order to avoid convoy on SSV after a shardVersion change&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/da5f391885ef316e990bb3a13477361c5e2a9dbf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/da5f391885ef316e990bb3a13477361c5e2a9dbf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3107364" author="xgen-internal-githook" created="Tue, 26 May 2020 17:18:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47975&quot; title=&quot;Optimize ScopedShardVersionCriticalSection in order to avoid convoy on SSV after a shardVersion change&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47975&quot;&gt;&lt;del&gt;SERVER-47975&lt;/del&gt;&lt;/a&gt; Optimize ScopedShardVersionCriticalSection in order to avoid convoy on SSV after a shardVersion change&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/da5f391885ef316e990bb3a13477361c5e2a9dbf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/da5f391885ef316e990bb3a13477361c5e2a9dbf&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1341872">SERVER-47974</issuekey>
        </issuelink>
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                                        <issuelink>
            <issuekey id="1130311">SERVER-45983</issuekey>
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            <issuelink>
            <issuekey id="1341934">SERVER-47982</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1341956">SERVER-47985</issuekey>
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            <issuekey id="1349542">SERVER-48180</issuekey>
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                            <issuelinktype id="10520">
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                                        <issuelink>
            <issuekey id="1366607">SERVER-48487</issuekey>
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