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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-24196] mapReduce command can unpin a ClientCursor out of the collection lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-24196</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This leads to a race condition in which the mapReduce command can attempt to access the Collection&apos;s cursor manager after it has been destroyed. This can lead to the server shutting down with a segmentation fault, though I suspect the probability of such an event occurring is low.&lt;/p&gt;</description>
                <environment></environment>
        <key id="287551">SERVER-24196</key>
            <summary>mapReduce command can unpin a ClientCursor out of the collection lock</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="9">Done</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Wed, 18 May 2016 15:48:55 +0000</created>
                <updated>Fri, 9 Dec 2016 21:47:33 +0000</updated>
                            <resolved>Mon, 23 May 2016 22:34:07 +0000</resolved>
                                                    <fixVersion>3.3.8</fixVersion>
                                    <component>MapReduce</component>
                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1272708" author="xgen-internal-githook" created="Mon, 23 May 2016 22:32:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24196&quot; title=&quot;mapReduce command can unpin a ClientCursor out of the collection lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24196&quot;&gt;&lt;del&gt;SERVER-24196&lt;/del&gt;&lt;/a&gt; ensure mapReduce safely frees its RangePreserver&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ff5bdd3321d525dd9d56595330b2ea6b98a2b87f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ff5bdd3321d525dd9d56595330b2ea6b98a2b87f&lt;/a&gt;&lt;/p&gt;</comment>
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