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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-69440] Improve the readability of synchronisation between clearFilteringMetadata and onShardVersionMismatch&apos;s recovery decision making</title>
                <link>https://jira.mongodb.org/browse/SERVER-69440</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fcdfe29cee066278b94ea2749456fc433cc398c6/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L521&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;condition&lt;/a&gt; of whether the on-disk set of MigrationCoordinator documents is consulted, with the state of the CSR &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fcdfe29cee066278b94ea2749456fc433cc398c6/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L501&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;from before&lt;/a&gt; a release of the CSR lock.&lt;/p&gt;

&lt;p&gt;This means that it is possible that an onShardVersionMismatch, which started concurrently with chunk migration, but got to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fcdfe29cee066278b94ea2749456fc433cc398c6/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L521&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this condition&lt;/a&gt; just when the MigrationSourceManager failed and cleared the filtering metadata due to error, to not actually run recovery when it should.&lt;/p&gt;

&lt;p&gt;This is currently protected by the fact that we only clear the filtering metadata under the critical section so there isn&apos;t a bug in practice, but just for the sake of better code readability we should re-take the condition after retaking the CSR lock.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2129306">SERVER-69440</key>
            <summary>Improve the readability of synchronisation between clearFilteringMetadata and onShardVersionMismatch&apos;s recovery decision making</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>PM-2144-Cleanup</label>
                    </labels>
                <created>Mon, 5 Sep 2022 13:37:24 +0000</created>
                <updated>Sun, 29 Oct 2023 21:33:36 +0000</updated>
                            <resolved>Tue, 6 Sep 2022 16:27:26 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4805136" author="xgen-internal-githook" created="Tue, 6 Sep 2022 16:23:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;, &apos;username&apos;: &apos;kaloianm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69440&quot; title=&quot;Improve the readability of synchronisation between clearFilteringMetadata and onShardVersionMismatch&amp;#39;s recovery decision making&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69440&quot;&gt;&lt;del&gt;SERVER-69440&lt;/del&gt;&lt;/a&gt; Improve the readability of synchronisation between clearFilteringMetadata and onShardVersionMismatch&apos;s recovery decision making&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a166b4268dbc4506ffddfaf2acb124bd0f5ed5b4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a166b4268dbc4506ffddfaf2acb124bd0f5ed5b4&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2129322">SERVER-69444</issuekey>
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