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    <link>https://jira.mongodb.org</link>
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    <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-58266] Stop forcing database version refreshes in chunk manager targeter</title>
                <link>https://jira.mongodb.org/browse/SERVER-58266</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we received a StaleDbVersion error during a batchWrite, in the ChunkManagerTargeter we locally decide if we need to refresh &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b76f72590c66064f3fd69fc73c79636ce95566cf/src/mongo/s/chunk_manager_targeter.cpp#L298-L311&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;based on some version comparision&lt;/a&gt; and if this is the case we force a full refresh of the catalog cache.&lt;/p&gt;

&lt;p&gt;If multiple cuncurrent batchWrite operations hit the same StaleDbVersion they will all force a full refresh of the catalog without any kind of syncronization, causing several refresh of the cached database metadata when actually only one is required.&lt;/p&gt;

&lt;p&gt;When receiving a StaleDbVersion the ChunkManagerTargeter should only call &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b76f72590c66064f3fd69fc73c79636ce95566cf/src/mongo/s/catalog_cache.h#L156&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;CatalogCache::onStaleDbVersion()&lt;/a&gt; and expect that on the next CatalogCache lookup it will receive the refreshed metadata. In this new approach if we receive several staleDbVersion concurrently with the same db version we will only perform one refresh.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1808558">SERVER-58266</key>
            <summary>Stop forcing database version refreshes in chunk manager targeter</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="13201">Fixed</resolution>
                                        <assignee username="tommaso.tocci@mongodb.com">Tommaso Tocci</assignee>
                                    <reporter username="tommaso.tocci@mongodb.com">Tommaso Tocci</reporter>
                        <labels>
                            <label>sharding</label>
                    </labels>
                <created>Mon, 5 Jul 2021 08:58:29 +0000</created>
                <updated>Sun, 29 Oct 2023 21:51:21 +0000</updated>
                            <resolved>Mon, 5 Jul 2021 16:10:53 +0000</resolved>
                                    <version>5.0.0-rc7</version>
                                    <fixVersion>5.0.2</fixVersion>
                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="4107433" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 18:26:24 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3953253" author="xgen-internal-githook" created="Tue, 20 Jul 2021 18:26:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Tommaso Tocci&apos;, &apos;email&apos;: &apos;tommaso.tocci@mongodb.com&apos;, &apos;username&apos;: &apos;toto-dev&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58266&quot; title=&quot;Stop forcing database version refreshes in chunk manager targeter&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58266&quot;&gt;&lt;del&gt;SERVER-58266&lt;/del&gt;&lt;/a&gt; Stop forcing database version refreshes in chunk manager targeter&lt;/p&gt;

&lt;p&gt;(cherry picked from commit daf6c4c0e7b136529e2a6152b062946f1c50217f)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f417d1781fcd9aaf2030fc011395700c5ef4d37b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f417d1781fcd9aaf2030fc011395700c5ef4d37b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3916780" author="xgen-internal-githook" created="Mon, 5 Jul 2021 16:00:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Tommaso Tocci&apos;, &apos;email&apos;: &apos;tommaso.tocci@mongodb.com&apos;, &apos;username&apos;: &apos;toto-dev&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58266&quot; title=&quot;Stop forcing database version refreshes in chunk manager targeter&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58266&quot;&gt;&lt;del&gt;SERVER-58266&lt;/del&gt;&lt;/a&gt; Stop forcing database version refreshes in chunk manager targeter&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/daf6c4c0e7b136529e2a6152b062946f1c50217f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/daf6c4c0e7b136529e2a6152b062946f1c50217f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3916270" author="tommaso.tocci" created="Mon, 5 Jul 2021 09:01:40 +0000"  >&lt;p&gt;Code Review: &lt;a href=&quot;http://mongodbcr.appspot.com/797340001&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://mongodbcr.appspot.com/797340001&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1808767">SERVER-58271</issuekey>
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