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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-40223] Inserting a completed `TransactionCoordinator` into the catalog leads to invariant</title>
                <link>https://jira.mongodb.org/browse/SERVER-40223</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Upon inserting a TransactionCoordinator, the catalog &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d1596a9693b9442dda1492934cf9bc26ad66176d/src/mongo/db/s/transaction_coordinator_catalog.cpp#L107&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;registers&lt;/a&gt; a continuation on the coordinator to remove it from the catalog when it completes. If the coordinator&apos;s deadline is too short, it is possible that the coordinator inserted is already completed, which would lead the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d1596a9693b9442dda1492934cf9bc26ad66176d/src/mongo/db/s/transaction_coordinator_catalog.cpp#L173&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;_remove&lt;/tt&gt;&lt;/a&gt; method getting invoked while still under the lock held by &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d1596a9693b9442dda1492934cf9bc26ad66176d/src/mongo/db/s/transaction_coordinator_catalog.cpp#L90&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;insert&lt;/tt&gt;&lt;/a&gt;, which leads to an invariant.&lt;/p&gt;

&lt;p&gt;As part of discovering this issue, I also realized that there is another race condition where the TransactionCoordinatorService&apos;s scheduler is &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d1596a9693b9442dda1492934cf9bc26ad66176d/src/mongo/db/s/transaction_coordinator_service.cpp#L251&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;shut down&lt;/a&gt; and the coordinator catalog &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d1596a9693b9442dda1492934cf9bc26ad66176d/src/mongo/db/s/transaction_coordinator_service.cpp#L253&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stepped down&lt;/a&gt; just after the new TransactionCoordinator is &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d1596a9693b9442dda1492934cf9bc26ad66176d/src/mongo/db/s/transaction_coordinator_service.cpp#L86&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;constructed&lt;/a&gt;, the coordinator will not complete, because the deadline task &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d1596a9693b9442dda1492934cf9bc26ad66176d/src/mongo/db/s/transaction_coordinator.cpp#L88&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;will not run&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="719394">SERVER-40223</key>
            <summary>Inserting a completed `TransactionCoordinator` into the catalog leads to invariant</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Tue, 19 Mar 2019 19:50:24 +0000</created>
                <updated>Sun, 29 Oct 2023 22:22:49 +0000</updated>
                            <resolved>Thu, 21 Mar 2019 13:22:14 +0000</resolved>
                                                    <fixVersion>4.1.10</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2188253" author="xgen-internal-githook" created="Fri, 22 Mar 2019 02:09:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;username&apos;: &apos;kaloianm&apos;, &apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40223&quot; title=&quot;Inserting a completed `TransactionCoordinator` into the catalog leads to invariant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40223&quot;&gt;&lt;del&gt;SERVER-40223&lt;/del&gt;&lt;/a&gt; Use the AsyncWorkScheduler to run local command when recovering a coordinator decision&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/be36aeb7166b2e06dd47dd0769ea28cbb7250041&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/be36aeb7166b2e06dd47dd0769ea28cbb7250041&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2187631" author="xgen-internal-githook" created="Thu, 21 Mar 2019 17:14:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;username&apos;: &apos;kaloianm&apos;, &apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40223&quot; title=&quot;Inserting a completed `TransactionCoordinator` into the catalog leads to invariant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40223&quot;&gt;&lt;del&gt;SERVER-40223&lt;/del&gt;&lt;/a&gt; Use the AsyncWorkScheduler to run local command when recovering a coordinator decision&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit cc2b4b907aaf788f356ec23e1b315ea5d7b2cf82.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ef0c1da8c82cf3f901dbbe17c35bfb7a6fdd8d51&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ef0c1da8c82cf3f901dbbe17c35bfb7a6fdd8d51&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2187185" author="xgen-internal-githook" created="Thu, 21 Mar 2019 13:20:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;, &apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;username&apos;: &apos;kaloianm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40223&quot; title=&quot;Inserting a completed `TransactionCoordinator` into the catalog leads to invariant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40223&quot;&gt;&lt;del&gt;SERVER-40223&lt;/del&gt;&lt;/a&gt; Ensure that the TransactionCoordinator will always complete if its scheduler is shut down&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c3d1212f1a4a258833b792a43d2d2d8a144f1adb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c3d1212f1a4a258833b792a43d2d2d8a144f1adb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2187184" author="xgen-internal-githook" created="Thu, 21 Mar 2019 13:20:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;, &apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;username&apos;: &apos;kaloianm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40223&quot; title=&quot;Inserting a completed `TransactionCoordinator` into the catalog leads to invariant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40223&quot;&gt;&lt;del&gt;SERVER-40223&lt;/del&gt;&lt;/a&gt; Use the AsyncWorkScheduler to run local command when recovering a coordinator decision&lt;/p&gt;

&lt;p&gt;... instead of the TaskExecutor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cc2b4b907aaf788f356ec23e1b315ea5d7b2cf82&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cc2b4b907aaf788f356ec23e1b315ea5d7b2cf82&lt;/a&gt;&lt;/p&gt;</comment>
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