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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
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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-26112] singleBatch can return incomplete results in a sharded environment</title>
                <link>https://jira.mongodb.org/browse/SERVER-26112</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In a sharded environment, &lt;tt&gt;mongos&lt;/tt&gt; will pass along the &lt;tt&gt;singleBatch:true&lt;/tt&gt; parameter to the &lt;tt&gt;mongod&lt;/tt&gt; shards.  This results in no cursor being sent back to &lt;tt&gt;mongos&lt;/tt&gt;.  If &lt;tt&gt;mongos&lt;/tt&gt; is unable to fill the result set requested by the client using the documents returned by the initial batches from the shards then incomplete results will be returned to the client since there are no cursors to issue `getMore` commands against.  &lt;/p&gt;</description>
                <environment></environment>
        <key id="316248">SERVER-26112</key>
            <summary>singleBatch can return incomplete results in a sharded environment</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="maria.vankeulen@mongodb.com">Maria van Keulen</assignee>
                                    <reporter username="christopher.harris@mongodb.com">Chris Harris</reporter>
                        <labels>
                    </labels>
                <created>Wed, 14 Sep 2016 19:07:39 +0000</created>
                <updated>Sat, 19 Nov 2016 00:05:59 +0000</updated>
                            <resolved>Thu, 13 Oct 2016 20:49:46 +0000</resolved>
                                    <version>3.2.9</version>
                                    <fixVersion>3.4.0-rc1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="1407724" author="xgen-internal-githook" created="Thu, 13 Oct 2016 18:06:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;mvankeulen94&apos;, u&apos;name&apos;: u&apos;Maria van Keulen&apos;, u&apos;email&apos;: u&apos;maria.vankeulen@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26112&quot; title=&quot;singleBatch can return incomplete results in a sharded environment&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26112&quot;&gt;&lt;del&gt;SERVER-26112&lt;/del&gt;&lt;/a&gt; Always forward singleBatch=false to shards&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/071e96c37db036cc81449048fb43341ab59912a4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/071e96c37db036cc81449048fb43341ab59912a4&lt;/a&gt;&lt;/p&gt;</comment>
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                            <customfieldvalue>&lt;p&gt;In a sharded environment, insert more than 101 documents with the same value for the shard key into a collection.  Issuing a find command which includes the parameter &lt;tt&gt;singleBatch:true&lt;/tt&gt; to a &lt;tt&gt;mongos&lt;/tt&gt; will not return any results to the client.  Issuing the command with &lt;tt&gt;singleBatch:true&lt;/tt&gt; removed will return 101 documents as expected.&lt;/p&gt;

&lt;p/&gt;
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