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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-33530] Investigate if a gap in cursor ownership allows cursor leaks during error paths</title>
                <link>https://jira.mongodb.org/browse/SERVER-33530</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During development on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24978&quot; title=&quot;Second batches in aggregation framework are asked synchronously&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24978&quot;&gt;&lt;del&gt;SERVER-24978&lt;/del&gt;&lt;/a&gt; we realized there&apos;s a time between establishing cursors on mongod and establishing the merging half of the pipeline on a merging shard where the cursors aren&apos;t logically owned by anyone. We suspect that an error encountered at this specific moment would cause the cursors to be abandoned on the shards, eventually cleaned up by the cursor timeout thread, but effectively leaked.&lt;/p&gt;

&lt;p&gt;We should investigate whether or not this is actually the case, and see if we can fix it if so.&lt;/p&gt;</description>
                <environment></environment>
        <key id="503205">SERVER-33530</key>
            <summary>Investigate if a gap in cursor ownership allows cursor leaks during error paths</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                    </labels>
                <created>Tue, 27 Feb 2018 21:15:40 +0000</created>
                <updated>Tue, 6 Dec 2022 03:37:19 +0000</updated>
                                                                            <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1818564" author="charlie.swanson" created="Wed, 28 Feb 2018 15:19:29 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt; It&apos;s unclear if this is a real bug at this point, but if so it would likely affect 3.6 as well. Hard to say for certain without more investigation though.&lt;/p&gt;

&lt;p&gt;We believe the problem specifically has to do with aggregations which are merged on one of the shards.&lt;/p&gt;</comment>
                            <comment id="1818446" author="bruce.lucas@10gen.com" created="Wed, 28 Feb 2018 14:07:12 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=charlie.swanson&quot; class=&quot;user-hover&quot; rel=&quot;charlie.swanson&quot;&gt;charlie.swanson&lt;/a&gt;, can you clarify whether this issue affects 3.6, or is it a regression in master?&lt;/p&gt;</comment>
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