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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-57297] Support OP_MSG exhaust cursors on mongos</title>
                <link>https://jira.mongodb.org/browse/SERVER-57297</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36105&quot; title=&quot;Implement server support for exhaust cursors in OP_MSG&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36105&quot;&gt;&lt;del&gt;SERVER-36105&lt;/del&gt;&lt;/a&gt; added support for OP_MSG exhaust cursors for both mongod and mongos in 4.2. Later in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44517&quot; title=&quot;Refactor exhaust cursors on top of exhaust isMaster code changes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44517&quot;&gt;&lt;del&gt;SERVER-44517&lt;/del&gt;&lt;/a&gt; support for exhaust on mongos was removed in 4.4 (for the good reason that the mongos code path was untested). This ticket request that OP_MSG exhaust cursors be officially supported on mongos.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DRIVERS-535&quot; title=&quot;Support Exhaust Cursor in OP_MSG&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DRIVERS-535&quot;&gt;&lt;del&gt;DRIVERS-535&lt;/del&gt;&lt;/a&gt; depends on this feature since we don&apos;t want to add a feature to drivers which doesn&apos;t work in sharded clusters. The motivation is that&#160;exhaust cursors can provide better query performance.&lt;/p&gt;

&lt;p&gt;Another potential improvement is for Load Balanced clusters. When the driver is connected through a load balancer it automatically pins the connection to the cursor. Since the connection is already pinned, it would be possible to automatically use exhaust cursors to (potentially) improve performance.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1761363">SERVER-57297</key>
            <summary>Support OP_MSG exhaust cursors on mongos</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="israel.hsu@mongodb.com">Israel Hsu</assignee>
                                    <reporter username="shane.harvey@mongodb.com">Shane Harvey</reporter>
                        <labels>
                            <label>invisiblesharding-m1</label>
                    </labels>
                <created>Fri, 28 May 2021 20:42:40 +0000</created>
                <updated>Sun, 29 Oct 2023 21:52:55 +0000</updated>
                            <resolved>Thu, 27 Jul 2023 19:39:26 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="5596800" author="xgen-internal-githook" created="Thu, 27 Jul 2023 20:37:36 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Israel Hsu&apos;, &apos;email&apos;: &apos;israel.hsu@mongodb.com&apos;, &apos;username&apos;: &apos;israelhsu&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57297&quot; title=&quot;Support OP_MSG exhaust cursors on mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57297&quot;&gt;&lt;del&gt;SERVER-57297&lt;/del&gt;&lt;/a&gt; enable mongos exhaust cursor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d5b53839c9e5724e9baad3dbe39e102b006d2188&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d5b53839c9e5724e9baad3dbe39e102b006d2188&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="571466">DRIVERS-535</issuekey>
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            <issuelink>
            <issuekey id="2403182">COMPASS-7056</issuekey>
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            <issuekey id="2403181">DOCS-16280</issuekey>
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            <issuekey id="994306">SERVER-44517</issuekey>
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            <issuelink>
            <issuekey id="571049">SERVER-36105</issuekey>
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                                        <issuelink>
            <issuekey id="2482128">PYTHON-4008</issuekey>
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            <issuelink>
            <issuekey id="1760037">PYTHON-2736</issuekey>
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