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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-40812] Allow replica set secondary node to batch apply same-node document shard key changes</title>
                <link>https://jira.mongodb.org/browse/SERVER-40812</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;b&gt;Background&lt;/b&gt;:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;A primary node writes multiple same-node shard key updates.&lt;/li&gt;
	&lt;li&gt;A second attempts to replicate, and is behind enough that it decides to batch apply instead of single apply.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;&lt;b&gt;Issue&lt;/b&gt;:&lt;br/&gt;
When the secondary attempts to apply each statement separately, it will see that the document shard key is changing, and will uassert because the opCtx is not in a transaction. It wouldn&apos;t be in a transaction, because the batch apply has no transaction associated with itself. This individual uassert leads to an fassert from the replication code.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Fix&lt;/b&gt;:&lt;br/&gt;
Add a check to &lt;tt&gt;!getOpCtx()-&amp;gt;writesAreReplicated()&lt;/tt&gt; in [this uassert here|https://github.com/mongodb/mongo/blob/406e1642a83d8b810bec41ad293c1b1c8a59a6dd/src/mongo/db/exec/update_stage.cpp#L929, so that we don&apos;t require the opCtx to have a transaction number if we are in a secondary node. &lt;/p&gt;</description>
                <environment></environment>
        <key id="744732">SERVER-40812</key>
            <summary>Allow replica set secondary node to batch apply same-node document shard key changes</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="blake.oler@mongodb.com">Blake Oler</assignee>
                                    <reporter username="blake.oler@mongodb.com">Blake Oler</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 Apr 2019 21:11:25 +0000</created>
                <updated>Sun, 29 Oct 2023 22:21:42 +0000</updated>
                            <resolved>Tue, 30 Apr 2019 15:29:29 +0000</resolved>
                                                    <fixVersion>4.1.11</fixVersion>
                                    <component>Replication</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2229258" author="xgen-internal-githook" created="Tue, 30 Apr 2019 15:29:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Blake Oler&apos;, &apos;username&apos;: &apos;BlakeIsBlake&apos;, &apos;email&apos;: &apos;blake.oler@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40812&quot; title=&quot;Allow replica set secondary node to batch apply same-node document shard key changes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40812&quot;&gt;&lt;del&gt;SERVER-40812&lt;/del&gt;&lt;/a&gt; Allow replica set secondary node to batch apply same-node document shard key changes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/326fd668123f73c5e81ce597d58e40b569374820&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/326fd668123f73c5e81ce597d58e40b569374820&lt;/a&gt;&lt;/p&gt;</comment>
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