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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-46663] runCmdOnPrimaryAndAwaitResponse() should not run DBDirect client command with the rstl lock held.</title>
                <link>https://jira.mongodb.org/browse/SERVER-46663</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently runCmdOnPrimaryAndAwaitResponse() takes RSTL lock in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/35a5d455672e65127a24e7cdb98ea1472124af4a/src/mongo/db/repl/replication_coordinator_impl.cpp#L2186&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;IX mode&lt;/a&gt; and performs DBDirectClient command using AlternativeClientRegion.  If the DBDirectClient command takes RSTL lock in the AlternativeClientRegion&apos;s opCtx, then it can lead to deadlock involving the stepdown  thread and the thread that calls runCmdOnPrimaryAndAwaitResponse(). &lt;br/&gt;
The reason for the deadlock is that, the stepdown thread can&apos;t acquire RSTL lock as the caller&apos;s original opCtx (including locks) has been stashed and replaced with a new opCtx by runCmdOnPrimaryAndAwaitResponse() using  AlternativeClientRegion class. So, no way stepdown can interrupt and make the original opCtx to release the locks. As a result, StepDown thread gets blocked behind runCmdOnPrimaryAndAwaitResponse() RSTL lock due to lock conflict . DBDirectClient command gets blocked behind stepdown as stepdown has enqueued the RSTL lock in X mode. And, runCmdOnPrimaryAndAwaitResponse() will be waiting for the DBDirectClient command&apos;s response.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1234216">SERVER-46663</key>
            <summary>runCmdOnPrimaryAndAwaitResponse() should not run DBDirect client command with the rstl lock held.</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="suganthi.mani@mongodb.com">Suganthi Mani</assignee>
                                    <reporter username="suganthi.mani@mongodb.com">Suganthi Mani</reporter>
                        <labels>
                    </labels>
                <created>Thu, 5 Mar 2020 20:28:00 +0000</created>
                <updated>Mon, 9 Mar 2020 15:27:04 +0000</updated>
                            <resolved>Mon, 9 Mar 2020 15:27:04 +0000</resolved>
                                                                    <component>Storage</component>
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