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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-73588] Suppress memory leak notification about canceling migrations on shutdown</title>
                <link>https://jira.mongodb.org/browse/SERVER-73588</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a node steps down, the&#160;&lt;a href=&quot;https://github.com/10gen/mongo/blob/056b0578ea08a530dbee00986c0f4a651771628a/src/mongo/db/s/migration_destination_manager.cpp#L1901&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;MigrationDestinationManager&lt;/tt&gt; cancels any ongoing migration&lt;/a&gt; by spawning a new executor thread to run the cancellation code. This thread needs to allocate the necessary resources for the entire duration of the operation, reasonably for a negligible period of time.&lt;/p&gt;

&lt;p&gt;When&#160;&lt;tt&gt;mongod&lt;/tt&gt;&#160;is shutdown, this procedure is triggered and the process terminates without waiting for this thread to finish. This is correctly identified as a memory leak.&lt;/p&gt;

&lt;p&gt;The obvious solution for this problem would be to join this thread, which is part of the&#160;&lt;tt&gt;TaskExecutorPool&lt;/tt&gt;. Nevertheless, in the past this has already been considered and the hypothesis was rejected as it would have slowed down the&#160;&lt;tt&gt;mongod&lt;/tt&gt; shutdown (see &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;Waiting for a reorganization of the global pool/executor (which could tackle the problem on a larger scale), we should instruct LSAN to ignore memory leaking in this function.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2252210">SERVER-73588</key>
            <summary>Suppress memory leak notification about canceling migrations on shutdown</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="antonio.fuschetto@mongodb.com">Antonio Fuschetto</assignee>
                                    <reporter username="antonio.fuschetto@mongodb.com">Antonio Fuschetto</reporter>
                        <labels>
                    </labels>
                <created>Fri, 3 Feb 2023 16:05:07 +0000</created>
                <updated>Sun, 29 Oct 2023 21:26:58 +0000</updated>
                            <resolved>Mon, 6 Feb 2023 07:16:22 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5169834" author="xgen-internal-githook" created="Mon, 6 Feb 2023 06:39:13 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73588&quot; title=&quot;Suppress memory leak notification about canceling migrations on shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73588&quot;&gt;&lt;del&gt;SERVER-73588&lt;/del&gt;&lt;/a&gt; Suppress memory leak alerts on canceling migrations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6853acbf8e747da44e0d89ae7d4ed5c94a321f98&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6853acbf8e747da44e0d89ae7d4ed5c94a321f98&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2081103">SERVER-67732</issuekey>
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