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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-52631] Refactor stale shard version retry helper</title>
                <link>https://jira.mongodb.org/browse/SERVER-52631</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The aggregation helpers library is providing a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bdb0cf06b551d1875458b8c0e98d6843ccbc10fc/src/mongo/db/pipeline/sharded_agg_helpers.h#L215-L276&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;shardVersionRetry method&lt;/a&gt; to retry commands that have thrown exceptions with error codes from the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ced11f8535500f0cb7c50f92ec3c6e4bc0729163/src/mongo/base/error_codes.yml#L11&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;StaleShardVersionError category&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Refactor the method in the following way:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Pull it out from agg_helpers, since it&apos;s used in &lt;a href=&quot;https://github.com/search?q=shardVersionRetry+repo%3Amongodb%2Fmongo+language%3AC%2B%2B&amp;amp;type=Code&amp;amp;ref=advsearch&amp;amp;l=&amp;amp;l=&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;several parts&lt;/a&gt; not all related to aggregation. And it is more correct to keep it under &quot;sharding path&quot;.&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Remove the two invariants (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/bdb0cf06b551d1875458b8c0e98d6843ccbc10fc/src/mongo/db/pipeline/sharded_agg_helpers.h#L243-L245&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;1&lt;/a&gt; , &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bdb0cf06b551d1875458b8c0e98d6843ccbc10fc/src/mongo/db/pipeline/sharded_agg_helpers.h#L259-L261&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;2&lt;/a&gt;) checking that the exception happened on the same namespace of the request because:
	&lt;ol&gt;
		&lt;li&gt;When renameCollection for sharded collection will be allowed, there could be stale shard versions thrown both on source and target namespaces.&lt;/li&gt;
		&lt;li&gt;The correct thing to do, is refreshing the shard version of the namespace the exception was thrown on.&lt;/li&gt;
	&lt;/ol&gt;
	&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;del&gt;Remove the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bdb0cf06b551d1875458b8c0e98d6843ccbc10fc/src/mongo/db/pipeline/sharded_agg_helpers.h#L224&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;namespace argument&lt;/a&gt;: it should be extracted from the exception&apos;s extra info.&lt;/del&gt; &lt;span class=&quot;error&quot;&gt;&amp;#91;This could not be done because of multiversion suites&amp;#93;&lt;/span&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;On the side, it is needed to ensure that every stale exception carries the namespace to be refreshed.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1534696">SERVER-52631</key>
            <summary>Refactor stale shard version retry helper</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="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                            <label>PM-1965-Cleanup</label>
                    </labels>
                <created>Thu, 5 Nov 2020 14:52:12 +0000</created>
                <updated>Sun, 29 Oct 2023 22:00:50 +0000</updated>
                            <resolved>Thu, 10 Dec 2020 11:37:28 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="3524640" author="xgen-internal-githook" created="Thu, 10 Dec 2020 11:35:38 +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-52631&quot; title=&quot;Refactor stale shard version retry helper&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52631&quot;&gt;&lt;del&gt;SERVER-52631&lt;/del&gt;&lt;/a&gt; Optional StaleEpoch extra info&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e36da1b27ef763f4d7367ddf0f2f97259c0deac3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e36da1b27ef763f4d7367ddf0f2f97259c0deac3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3507023" author="xgen-internal-githook" created="Fri, 27 Nov 2020 08:57:55 +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-52631&quot; title=&quot;Refactor stale shard version retry helper&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52631&quot;&gt;&lt;del&gt;SERVER-52631&lt;/del&gt;&lt;/a&gt; Refactor stale shard version retry helper (Part 2)&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6091eeba38726a8394a938e9481f29ef117a9033&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6091eeba38726a8394a938e9481f29ef117a9033&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3491558" author="xgen-internal-githook" created="Mon, 16 Nov 2020 14:18:44 +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-52631&quot; title=&quot;Refactor stale shard version retry helper&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52631&quot;&gt;&lt;del&gt;SERVER-52631&lt;/del&gt;&lt;/a&gt; templating stale shard version extrainfo&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2d11f4dd0804b5fafdd15cbe6ee444a5d82fd3d7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2d11f4dd0804b5fafdd15cbe6ee444a5d82fd3d7&lt;/a&gt;&lt;/p&gt;</comment>
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