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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-60132] DonorAbortMigrationCmd may leak a tenant migration </title>
                <link>https://jira.mongodb.org/browse/SERVER-60132</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The implementation of &lt;tt&gt;DonorAbortMigrationCmd&lt;/tt&gt; does not record the fact that a migration has been aborted in the event that it is unable to lookup an existing migration when the command is received. There is a chance (albeit quite rare) that the donor receives an abort command &lt;em&gt;before&lt;/em&gt; the migration it intends to abort is started, in which case the donor will report an unknown migration and then proceed to run the full migration that was presumed aborted. The solution is to durably record that the migration is in an aborted state, even if there is no existing known migration.&lt;/p&gt;

&lt;p&gt;As an addendum to this work, we should consider updating the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/4a43e817011e7cde84c2dce87619d81921f19c9a/docs/primary_only_service.md&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;PrimaryOnlyService documentation&lt;/a&gt; to mention that the &lt;tt&gt;lookup&lt;/tt&gt; method should only be used strictly to &lt;em&gt;observe&lt;/em&gt; a service but not &lt;em&gt;interact&lt;/em&gt; with it in any way. Instead users should prefer &lt;tt&gt;getOrCreate&lt;/tt&gt; to ensure that some instance (and backing state) always exists. &lt;/p&gt;</description>
                <environment></environment>
        <key id="1880151">SERVER-60132</key>
            <summary>DonorAbortMigrationCmd may leak a tenant migration </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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="matt.broadstone@mongodb.com">Matt Broadstone</reporter>
                        <labels>
                    </labels>
                <created>Tue, 21 Sep 2021 22:29:51 +0000</created>
                <updated>Tue, 10 Oct 2023 21:46:02 +0000</updated>
                            <resolved>Tue, 10 Oct 2023 21:46:02 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5769191" author="suganthi.mani" created="Tue, 10 Oct 2023 21:43:11 +0000"  >&lt;p&gt;This issue only affects tenant migration(TM).  Shard merge(SM) and TM shares the donor service/cmds, it&apos;s not an issue for SM because the Cloud does not run the &apos;abortMigration&apos; command for merges.  Given that TM will retire in 7.2 and the window for this race condition to occur in production is exceedingly small, and it has been present since the introduction of tenant migration (version 5.0), I am going to close this ticket as &quot;won&apos;t fix&quot;.&lt;/p&gt;</comment>
                            <comment id="4117008" author="JIRAUSER1262621" created="Mon, 11 Oct 2021 21:37:54 +0000"  >&lt;p&gt;It was decided to send this Jira back to the backlog as we identified that the scope of the change needed for this was getting a lot bigger than expected. When trying to set a test case to abort prior to the migration started we want to set the Doc state to be into a AbortMigration state. However it seems that in a lot of places in the code we are expecting as a first state to be kUnintialized and it seems pretty obvious that is the behavior being enforced here.&lt;/p&gt;

&lt;p&gt;The following Pull Request disclose more information about the changes that were done while working on this issue:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/pull/1087&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/pull/1087&lt;/a&gt;&lt;/p&gt;</comment>
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