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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-73293] Make sure range deleter service is up before accessing `_rangeDeletionTasks`</title>
                <link>https://jira.mongodb.org/browse/SERVER-73293</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During stepUp of RangeDeleterService we call &lt;a href=&quot;https://github.com/mongodb/mongo/blob/4017f1973070f9f0065f2e29353b7b6dc8991c1e/src/mongo/db/s/range_deleter_service.cpp#L309&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_joinAndResetState()&lt;/a&gt; without the class mutex. As part of this function we also clear &lt;a href=&quot;https://github.com/mongodb/mongo/blob/4017f1973070f9f0065f2e29353b7b6dc8991c1e/src/mongo/db/s/range_deleter_service.cpp#L441&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_rangeDeletionTasks&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;In general the public API of this service calls &lt;a href=&quot;https://github.com/mongodb/mongo/blob/4017f1973070f9f0065f2e29353b7b6dc8991c1e/src/mongo/db/s/range_deleter_service.h#L183-L187&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_acquireMutexFailIfServiceNotUp&lt;/a&gt; so we would expect that no external thread would access the _rangeDeletionTasks before the service initialization is completed and the _state is set to &lt;tt&gt;kUp&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;There are two special public API that uses _acquireMutexUnconditionally and then access the _rangeDeletionTasks object:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/4017f1973070f9f0065f2e29353b7b6dc8991c1e/src/mongo/db/s/range_deleter_service.cpp#L477-L486&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;RangeDeleterService::dumpState&lt;/tt&gt;&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/4017f1973070f9f0065f2e29353b7b6dc8991c1e/src/mongo/db/s/range_deleter_service.cpp#L490-L498&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;RangeDeleterService::totalNumOfRegisteredTasks&lt;/tt&gt;&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;This means that these two functions can access the _rangeDeletionTasks object while the service is still down and potentially at the same time that the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/4017f1973070f9f0065f2e29353b7b6dc8991c1e/src/mongo/db/s/range_deleter_service.cpp#L309&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_joinAndResetState()&lt;/a&gt; is clearing it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2242912">SERVER-73293</key>
            <summary>Make sure range deleter service is up before accessing `_rangeDeletionTasks`</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="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</assignee>
                                    <reporter username="tommaso.tocci@mongodb.com">Tommaso Tocci</reporter>
                        <labels>
                    </labels>
                <created>Wed, 25 Jan 2023 12:41:59 +0000</created>
                <updated>Sun, 29 Oct 2023 21:27:26 +0000</updated>
                            <resolved>Mon, 30 Jan 2023 10:28:44 +0000</resolved>
                                    <version>6.2.0-rc6</version>
                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5150595" author="xgen-internal-githook" created="Mon, 30 Jan 2023 10:27:49 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73293&quot; title=&quot;Make sure range deleter service is up before accessing `_rangeDeletionTasks`&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73293&quot;&gt;&lt;del&gt;SERVER-73293&lt;/del&gt;&lt;/a&gt; Make sure range deleter service is up before accessing `_rangeDeletionTasks`&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0de85d50a1d7a1c3b3f2dd73145b7dd55b37b56a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0de85d50a1d7a1c3b3f2dd73145b7dd55b37b56a&lt;/a&gt;&lt;/p&gt;</comment>
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