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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-46816] Race between oplog applier thread and index build coordinator thread leads to an invariant failure.</title>
                <link>https://jira.mongodb.org/browse/SERVER-46816</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A race can happen between oplog applier thread and index build coordinator thread and leading to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/12d7f8eed6cafd37697354ab4bbbe25fb47ad462/src/mongo/db/index_builds_coordinator.cpp#L812&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt; invariant failure. Oplog applier on receiving abortIndexBuild oplog entry performs the below steps.&lt;/p&gt;

&lt;p&gt;1) Oplog applier thread&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/12d7f8eed6cafd37697354ab4bbbe25fb47ad462/src/mongo/db/index_builds_coordinator.cpp#L807&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;signals&lt;/a&gt;&#160;abort to index builder.&lt;br/&gt;
2) Then calls the IndexBuildsCoordinator::_getIndexBuild() to get the&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/12d7f8eed6cafd37697354ab4bbbe25fb47ad462/src/mongo/db/index_builds_coordinator.cpp#L812&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ReplIndexBuildState&lt;/a&gt;&#160;for that index build.&lt;br/&gt;
3) Then waits for the index build to complete by waiting on the&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/12d7f8eed6cafd37697354ab4bbbe25fb47ad462/src/mongo/db/index_builds_coordinator.cpp#L816&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ReplIndexBuildState:: sharedPromise&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Between step 1 and step 2, the index builder might have&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/12d7f8eed6cafd37697354ab4bbbe25fb47ad462/src/mongo/db/index_builds_coordinator.cpp#L1848&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;aborted and torn down&lt;/a&gt;&#160;the index build. In such cases, the step 2 would return &quot;NoSuchKey&quot; error.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1266892">SERVER-46816</key>
            <summary>Race between oplog applier thread and index build coordinator thread leads to an invariant failure.</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="3">Duplicate</resolution>
                                        <assignee username="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="suganthi.mani@mongodb.com">Suganthi Mani</reporter>
                        <labels>
                    </labels>
                <created>Thu, 12 Mar 2020 02:51:13 +0000</created>
                <updated>Thu, 9 Apr 2020 13:52:49 +0000</updated>
                            <resolved>Thu, 9 Apr 2020 13:52:49 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3032785" author="louis.williams" created="Thu, 9 Apr 2020 13:52:49 +0000"  >&lt;p&gt;This very specific race condition is eliminated by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46560&quot; title=&quot;Make Abort index build logic deterministic.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46560&quot;&gt;&lt;del&gt;SERVER-46560&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="2987877" author="louis.williams" created="Thu, 19 Mar 2020 17:39:25 +0000"  >&lt;p&gt;This problem will likely be addressed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46560&quot; title=&quot;Make Abort index build logic deterministic.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46560&quot;&gt;&lt;del&gt;SERVER-46560&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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