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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-66090] Make mongod service entry point resilient to session yielding</title>
                <link>https://jira.mongodb.org/browse/SERVER-66090</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The mongod service entry point will &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bfdf1c142d3fc2240e57c657226d757e3f5e6594/src/mongo/db/service_entry_point_common.cpp#L763&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stash a TransactionParticipant::Participant&lt;/a&gt; (effectively a pointer to the transaction state that decorates a Session from the SessionCatalog) and on command errors use it to clean up the transaction. If during the command the Session associated with that participant is yielded and the command is interrupted, the clean up code may run without the session checked out, so it&apos;s unsafe to access the participant.&lt;/p&gt;

&lt;p&gt;This is an existing issue, but before PM-2210, very few operations yielded a session (only certain aggregation stages in a transaction and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bfdf1c142d3fc2240e57c657226d757e3f5e6594/src/mongo/db/service_entry_point_common.cpp#L871-L872&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the logic that waits for an ongoing prepared transaction to complete before starting a transaction with a higher txnNumber&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;Instead, the clean up code should get the participant via TransactionParticipant::get() to ensure the session is still checked out.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2036623">SERVER-66090</key>
            <summary>Make mongod service entry point resilient to session yielding</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="jack.mulrow@mongodb.com">Jack Mulrow</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Fri, 29 Apr 2022 19:18:45 +0000</created>
                <updated>Sun, 29 Oct 2023 21:38:46 +0000</updated>
                            <resolved>Wed, 4 May 2022 21:02:37 +0000</resolved>
                                                    <fixVersion>6.0.0-rc5</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4527203" author="xgen-internal-githook" created="Wed, 4 May 2022 21:48:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66090&quot; title=&quot;Make mongod service entry point resilient to session yielding&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66090&quot;&gt;&lt;del&gt;SERVER-66090&lt;/del&gt;&lt;/a&gt; Make mongod service entry point resilient to session yielding&lt;/p&gt;

&lt;p&gt;(cherry picked from commit e63da638a19323b426ef39e819eda14109ef9746)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/300f2eed08356faeb2fa638da89aac443c9d056b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/300f2eed08356faeb2fa638da89aac443c9d056b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4526820" author="xgen-internal-githook" created="Wed, 4 May 2022 20:00:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66090&quot; title=&quot;Make mongod service entry point resilient to session yielding&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66090&quot;&gt;&lt;del&gt;SERVER-66090&lt;/del&gt;&lt;/a&gt; Make mongod service entry point resilient to session yielding&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e63da638a19323b426ef39e819eda14109ef9746&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e63da638a19323b426ef39e819eda14109ef9746&lt;/a&gt;&lt;/p&gt;</comment>
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