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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-50952] Ensure that cached collection entries with stale-marked shard will be eventually refreshed</title>
                <link>https://jira.mongodb.org/browse/SERVER-50952</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Suppose that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f11e900c83a67aca01b1d681e35c05a5031fe810/src/mongo/s/catalog_cache.cpp#L258&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;we set a shard stale on a cached collection entry&lt;/a&gt; and then &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f11e900c83a67aca01b1d681e35c05a5031fe810/src/mongo/s/catalog_cache.cpp#L262-L263&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;we try to advance the time for that entry&lt;/a&gt; with an older version w.r.t. the one already cached.&lt;br/&gt;
 Until another advance time or invalidation will be called for that specific entry, it will remain with a shard marked as stale but won&apos;t be refreshed because it is already at the latest known version.&lt;/p&gt;

&lt;p&gt;To fix this we need to ensure that shards on a cached collection entry are marked stale only if we are sure that a lookup will be triggered at the next access. In order to enforce this, we can make the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f11e900c83a67aca01b1d681e35c05a5031fe810/src/mongo/s/catalog_cache.cpp#L262&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;advanceTimeInStore&lt;/a&gt; return a boolean that indicates if the time has been actually advanced or not, and then use this boolean to conditionally mark the shard as stale.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1475175">SERVER-50952</key>
            <summary>Ensure that cached collection entries with stale-marked shard will be eventually refreshed</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>PM-1645-Milestone-2</label>
                    </labels>
                <created>Tue, 15 Sep 2020 16:32:52 +0000</created>
                <updated>Sun, 29 Oct 2023 22:03:10 +0000</updated>
                            <resolved>Mon, 21 Sep 2020 20:46:39 +0000</resolved>
                                    <version>4.7.0</version>
                                    <fixVersion>4.8.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3403619" author="xgen-internal-githook" created="Mon, 21 Sep 2020 17:30:33 +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-50952&quot; title=&quot;Ensure that cached collection entries with stale-marked shard will be eventually refreshed&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50952&quot;&gt;&lt;del&gt;SERVER-50952&lt;/del&gt;&lt;/a&gt; Ensure that cached collection entries with stale-marked shard will be eventually refreshed&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1ccff1fdee9edfd99109e1e508ecdddbe06c3bc4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1ccff1fdee9edfd99109e1e508ecdddbe06c3bc4&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1152460">SERVER-46199</issuekey>
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