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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-4800] mongos cursor handling with timeouts</title>
                <link>https://jira.mongodb.org/browse/SERVER-4800</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;... to avoid timeouts, we should pull from each cursor in turn.&lt;/p&gt;

&lt;p&gt;Special case - if the sort order is over the shard key - but in this case we&apos;d have to detect chunk bounds anyway so probably only a small optimization if any.&lt;/p&gt;</description>
                <environment></environment>
        <key id="29314">SERVER-4800</key>
            <summary>mongos cursor handling with timeouts</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="9">Done</resolution>
                                        <assignee username="greg_10gen">Greg Studer</assignee>
                                    <reporter username="greg_10gen">Greg Studer</reporter>
                        <labels>
                    </labels>
                <created>Fri, 27 Jan 2012 20:32:46 +0000</created>
                <updated>Mon, 11 Jul 2016 18:33:07 +0000</updated>
                            <resolved>Thu, 7 Jun 2012 18:01:44 +0000</resolved>
                                                    <fixVersion>2.0.7</fixVersion>
                    <fixVersion>2.1.2</fixVersion>
                                    <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="137268" author="tad" created="Wed, 27 Jun 2012 20:29:11 +0000"  >&lt;p&gt;Backported to 2.0.7.&lt;/p&gt;</comment>
                            <comment id="137266" author="auto" created="Wed, 27 Jun 2012 20:25:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-06-27T12:36:11-07:00&apos;, u&apos;email&apos;: u&apos;greg@10gen.com&apos;, u&apos;name&apos;: u&apos;Greg Studer&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4800&quot; title=&quot;mongos cursor handling with timeouts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4800&quot;&gt;&lt;del&gt;SERVER-4800&lt;/del&gt;&lt;/a&gt; make unsorted parallel cursors do round-robin when pulling data, minimize timeouts&lt;/p&gt;

&lt;p&gt;Signed-off-by: Tad Marshall &amp;lt;tad@10gen.com&amp;gt;&lt;br/&gt;
Branch: v2.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/12de29a40185e24c1bfb2c5d838903c15e8b2a85&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/12de29a40185e24c1bfb2c5d838903c15e8b2a85&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="122113" author="auto" created="Tue, 22 May 2012 22:58:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;gregstuder&apos;, u&apos;name&apos;: u&apos;Greg Studer&apos;, u&apos;email&apos;: u&apos;greg@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4800&quot; title=&quot;mongos cursor handling with timeouts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4800&quot;&gt;&lt;del&gt;SERVER-4800&lt;/del&gt;&lt;/a&gt; make unsorted parallel cursors do round-robin when pulling data, minimize timeouts&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b594f8a458322e174d5278a13ced4f1f48ffa75b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b594f8a458322e174d5278a13ced4f1f48ffa75b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="91198" author="greg_10gen" created="Thu, 23 Feb 2012 02:13:14 +0000"  >&lt;p&gt;Realized I had this patch lying around and never committed...&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://codereview.10gen.com/7400003/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://codereview.10gen.com/7400003/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Pretty sure it tests okay, but will have to retry.&lt;/p&gt;

&lt;p&gt;Should fix the no-search case.  As eliot sez, for search case we&apos;ll need a keepalive for the cursor - maybe a getMore with a keepalive flag or something.&lt;/p&gt;</comment>
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            <issuekey id="40702">SERVER-6036</issuekey>
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