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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-53000] Retry command on stale exception on shards only if the shard is stale</title>
                <link>https://jira.mongodb.org/browse/SERVER-53000</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Thanks to&#160; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28943&quot; title=&quot;Make shards retry non-write commands on stale version exceptions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28943&quot;&gt;&lt;del&gt;SERVER-28943&lt;/del&gt;&lt;/a&gt; shards now &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e69c967ff8b53634770438dfe9a5c7d13548351b/src/mongo/db/service_entry_point_common.cpp#L1579-L1591&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;retry non-write commands on stale exception&lt;/a&gt;.&lt;br/&gt;
 This is done unconditionally even if &lt;a href=&quot;https://github.com/mongodb/mongo/blob/90cfa3eeb18000ca3081e83be66ca4eaa244665e/src/mongo/db/s/collection_sharding_runtime.cpp#L353-L354&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the exception&lt;/a&gt; is indicating that the router was stale.&lt;/p&gt;

&lt;p&gt;Once database and collection version will be truly comparable (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52587&quot; title=&quot;Making collection and database instances comparable through cluster time (no more epochs)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52587&quot;&gt;&lt;del&gt;SERVER-52587&lt;/del&gt;&lt;/a&gt;) we can conditionally refresh and retry the command only if &quot;requiredVersion (Router) &amp;gt; wantedVersion (Shard)&quot;.&lt;/p&gt;

&lt;p&gt;This new behavior should be either addressed once 5.0 becomes last-lts or should be guarded by an FCV flag in order to be sure that we are on a binary version that uses truly comparable database and collection versions.&lt;/p&gt;

&lt;p&gt;------&lt;/p&gt;

&lt;p&gt;There is a TODO in the codebase referencing a resolved ticket which is assigned to you.&lt;/p&gt;

&lt;p&gt;Please follow this link to see the lines of code referencing this resolved ticket:&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/search?q=SERVER-52784&amp;amp;type=Code&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/search?q=SERVER-52784&amp;amp;type=Code&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The next steps for this ticket are to either remove the outdated TODO or follow the steps in the TODO if it is correct. If the latter, please update the summary and description of this ticket to represent the work you&apos;re actually doing.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1548594">SERVER-53000</key>
            <summary>Retry command on stale exception on shards only if the shard is stale</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="tommaso.tocci@mongodb.com">Tommaso Tocci</assignee>
                                    <reporter username="dbeng-pm-bot">PM Bot</reporter>
                        <labels>
                            <label>autogen-todo</label>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Fri, 20 Nov 2020 20:36:44 +0000</created>
                <updated>Sun, 29 Oct 2023 22:00:09 +0000</updated>
                            <resolved>Fri, 13 Aug 2021 11:01:00 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4108338" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 19:04:12 +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="3994768" author="xgen-internal-githook" created="Wed, 11 Aug 2021 12:57:41 +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-53000&quot; title=&quot;Retry command on stale exception on shards only if the shard is stale&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53000&quot;&gt;&lt;del&gt;SERVER-53000&lt;/del&gt;&lt;/a&gt; Retry command on stale exception on shards only if the shard is stale&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/079b4cb1f3b2b527a3294ba74c806e83310245dc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/079b4cb1f3b2b527a3294ba74c806e83310245dc&lt;/a&gt;&lt;/p&gt;</comment>
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