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    <title>MongoDB Jira</title>
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    <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-46849] Range deletion task submission via OpObserver is racy</title>
                <link>https://jira.mongodb.org/browse/SERVER-46849</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we submit ranges for deletion on recipient shards, we submit them &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9a905f68d4ec49ee62a20bdba779d6d726b297ba/src/mongo/db/s/shard_server_op_observer.cpp#L258&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;through the onUpdate OpObserver when an update is received to remove the &apos;pending&apos; flag from a document in config.rangeDeletions&lt;/a&gt;. This submits an async task which will eventually cause the range to be deleted. The problem is that if the deletion task reaches &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9a905f68d4ec49ee62a20bdba779d6d726b297ba/src/mongo/db/s/range_deletion_util.cpp#L299&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this line&lt;/a&gt; before the commit of the update that triggered it, then it may find that the update has not yet occurred, leading this task to be abandoned. This will lead to orphaned documents until failover, a consequence of which is that incoming migrations for that range will be blocked.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1272178">SERVER-46849</key>
            <summary>Range deletion task submission via OpObserver is racy</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="matthew.saltz@mongodb.com">Matthew Saltz</assignee>
                                    <reporter username="matthew.saltz@mongodb.com">Matthew Saltz</reporter>
                        <labels>
                            <label>sharding-csrs-stepdown-also</label>
                    </labels>
                <created>Fri, 13 Mar 2020 16:29:00 +0000</created>
                <updated>Sun, 29 Oct 2023 22:10:49 +0000</updated>
                            <resolved>Fri, 27 Mar 2020 17:07:46 +0000</resolved>
                                                    <fixVersion>4.4.0-rc0</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3004935" author="xgen-internal-githook" created="Fri, 27 Mar 2020 19:25:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;matthew.saltz@mongodb.com&apos;, &apos;name&apos;: &apos;Matthew Saltz&apos;, &apos;username&apos;: &apos;saltzm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46849&quot; title=&quot;Range deletion task submission via OpObserver is racy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46849&quot;&gt;&lt;del&gt;SERVER-46849&lt;/del&gt;&lt;/a&gt; Submit range deletion task in an onCommit handler&lt;/p&gt;

&lt;p&gt;(cherry picked from commit efbe46ec29d5a7ba6bd1786a5c9b47fd44b731d3)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d853229b9b7153429f46ef075c7092218c540c11&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d853229b9b7153429f46ef075c7092218c540c11&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3004479" author="xgen-internal-githook" created="Fri, 27 Mar 2020 16:05:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;matthew.saltz@mongodb.com&apos;, &apos;name&apos;: &apos;Matthew Saltz&apos;, &apos;username&apos;: &apos;saltzm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46849&quot; title=&quot;Range deletion task submission via OpObserver is racy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46849&quot;&gt;&lt;del&gt;SERVER-46849&lt;/del&gt;&lt;/a&gt; Submit range deletion task in an onCommit handler&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/efbe46ec29d5a7ba6bd1786a5c9b47fd44b731d3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/efbe46ec29d5a7ba6bd1786a5c9b47fd44b731d3&lt;/a&gt;&lt;/p&gt;</comment>
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