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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-53451] All continuations in resharding primary only services run methods should capture this as shared_from_this </title>
                <link>https://jira.mongodb.org/browse/SERVER-53451</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a state document is deleted, any shared_ptr references to &apos;this&apos; in the primary only service machinery are destroyed. If the future chain in any primary only service&apos;s run method has not finished and the state document for that object has been removed, we&apos;ll seg fault and crash. Each service captures &apos;this&apos; as &apos;shared_from_this&apos; after the point that it expects that its state doc will be removed, but to protect against seg faulting (and crashing) in the event that a user accidentally deletes a doc or drops the collection entirely we should capture &apos;this&apos; as &apos;shared_from_this&apos; for each continuation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1572436">SERVER-53451</key>
            <summary>All continuations in resharding primary only services run methods should capture this as shared_from_this </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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="janna.golden@mongodb.com">Janna Golden</reporter>
                        <labels>
                    </labels>
                <created>Fri, 18 Dec 2020 20:34:34 +0000</created>
                <updated>Tue, 6 Dec 2022 01:41:14 +0000</updated>
                            <resolved>Tue, 22 Dec 2020 19:40:26 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3536967" author="max.hirschhorn@10gen.com" created="Fri, 18 Dec 2020 22:14:46 +0000"  >&lt;p&gt;Being robust to situations where the state document is removed unexpectedly is a great point.&lt;/p&gt;

&lt;p&gt;After discussing a little with Sam, I don&apos;t think it is strictly necessary to capture shared&amp;#95;from&amp;#95;this() in earlier parts of the future chain. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a2a154c9a9aa133603d0f2797d77479a7f192ac8/src/mongo/db/repl/primary_only_service.cpp#L697&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;PrimaryOnlyService::_scheduleRun() guarantees that the PrimaryOnlyService Instance is alive at least until run() returns&lt;/a&gt;. By the time ReshardingCoordinator::run() returns, we&apos;ll have defined at least one lambda which captures shared&amp;#95;from&amp;#95;this(). This means that the &lt;tt&gt;this&lt;/tt&gt; pointer will remain valid as earlier parts of the future chain start to execute both while ReshardingCoordinator::run() is running and after ReshardingCoordinator::run() has returned.&lt;/p&gt;</comment>
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