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    <title>MongoDB Jira</title>
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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-57292] Introduce onStepDown cancelation token to fix shutdown memory leak</title>
                <link>https://jira.mongodb.org/browse/SERVER-57292</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The motivation for this is to make a clean refactoring of the executor usage for BF-18913 and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51317&quot; title=&quot;Change TransactionCoordinator to use executor from AsynchWorkScheduler&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51317&quot;&gt;&lt;del&gt;SERVER-51317&lt;/del&gt;&lt;/a&gt;. We do not cancel pending tasks in the transaction coordinator and they show up as memory leak.&lt;/p&gt;

&lt;p&gt;Switching the transaction coordinator to use AsyncWorkScheduler for all tasks is not possible because it can block for a while. Right now we rely on the fact that Grid pool executor is not shutting down as explained in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51316&quot; title=&quot;Grid executor pool should be shut down on mongod shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51316&quot;&gt;&lt;del&gt;SERVER-51316&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;We cannot use any global flag like globalInShutdownDeprecated() because it breaks the termination sequence.&lt;/p&gt;

&lt;p&gt;Proposed solution:&lt;/p&gt;

&lt;p&gt;Add one or several cancelation tokens specifically for onStepDown to be used in src/mongo/db/commands/shutdown_d.cpp and cancel them in proper order from stepDownForShutdown() and beginShutdown().&lt;/p&gt;

&lt;p&gt;When the foundation is in I will wire the proper token to be used in the transaction coordinator as part of working on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51317&quot; title=&quot;Change TransactionCoordinator to use executor from AsynchWorkScheduler&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51317&quot;&gt;&lt;del&gt;SERVER-51317&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1761237">SERVER-57292</key>
            <summary>Introduce onStepDown cancelation token to fix shutdown memory leak</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="andrew.shuvalov@mongodb.com">Andrew Shuvalov</reporter>
                        <labels>
                    </labels>
                <created>Fri, 28 May 2021 18:30:45 +0000</created>
                <updated>Tue, 6 Dec 2022 01:16:28 +0000</updated>
                            <resolved>Fri, 28 May 2021 19:14:50 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3848366" author="JIRAUSER1256988" created="Fri, 28 May 2021 19:14:36 +0000"  >&lt;p&gt;We spoke with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthew.saltz&quot; class=&quot;user-hover&quot; rel=&quot;matthew.saltz&quot;&gt;matthew.saltz&lt;/a&gt; and we&apos;ll try to avoid doing that. Details will be in the BF&lt;/p&gt;</comment>
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