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    <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-40522] OplogSlotReserver must take a global IX lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-40522</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When the &lt;tt&gt;OplogSlotReserver&lt;/tt&gt; reserves oplog slots &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c8a133c3714d80d02cb8524d5278e6c1321e26f1/src/mongo/db/transaction_participant.cpp#L609&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;, it is not necessarily holding any locks. This could result in illegal usage &#8211; it&apos;s a requirement to hold a Global IX lock when reserving oplog slots in order to conflict with shutdown and recover to timestamp. We do typically hold locks when the oplog slots are reserved, but the locker is stashed in a &lt;tt&gt;SideTransactionBlock&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c8a133c3714d80d02cb8524d5278e6c1321e26f1/src/mongo/db/transaction_participant.cpp#L605&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;, and the locks can be released before we release the oplog slot, e.g.&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/c8a133c3714d80d02cb8524d5278e6c1321e26f1/src/mongo/db/transaction_participant.cpp#L1419&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. Thus the &lt;tt&gt;OplogSlotReserver&lt;/tt&gt; should acquire its own Global IX lock.&lt;/p&gt;</description>
                <environment></environment>
        <key id="732520">SERVER-40522</key>
            <summary>OplogSlotReserver must take a global IX lock</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="3">Duplicate</resolution>
                                        <assignee username="siyuan.zhou@mongodb.com">Siyuan Zhou</assignee>
                                    <reporter username="tess.avitabile@mongodb.com">Tess Avitabile</reporter>
                        <labels>
                    </labels>
                <created>Mon, 8 Apr 2019 15:11:05 +0000</created>
                <updated>Thu, 9 May 2019 02:23:14 +0000</updated>
                            <resolved>Thu, 9 May 2019 02:23:14 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2235140" author="tess.avitabile" created="Mon, 6 May 2019 13:07:59 +0000"  >&lt;p&gt;Assigning to &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=siyuan.zhou&quot; class=&quot;user-hover&quot; rel=&quot;siyuan.zhou&quot;&gt;siyuan.zhou&lt;/a&gt;, since this will be fixed by the commit for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40498&quot; title=&quot;Writing transaction oplog entries must not take locks while holding an oplog slot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40498&quot;&gt;&lt;del&gt;SERVER-40498&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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