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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-19842] Support allowPartialResults in new mongos read path</title>
                <link>https://jira.mongodb.org/browse/SERVER-19842</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;OP_QUERY style find accepts an option called &lt;tt&gt;partial&lt;/tt&gt;, &lt;a href=&quot;http://docs.mongodb.org/manual/reference/method/cursor.addOption/#DBQuery.Option.partial&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;documented here&lt;/a&gt;. If set, mongos will return partial results when a shard is down rather than returning an error to the client.&lt;/p&gt;

&lt;p&gt;In order to support this flag in 3.2, we need to do the following:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;The find command should accept a parameter called &lt;tt&gt;allowPartialResults&lt;/tt&gt;.&lt;/li&gt;
	&lt;li&gt;The AsyncResultsMerger in the new mongos read path should avoid propagating the error if only some of the shards can be contacted and &lt;tt&gt;allowPartialResults&lt;/tt&gt; is set.&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="224851">SERVER-19842</key>
            <summary>Support allowPartialResults in new mongos read path</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="9">Done</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Mon, 10 Aug 2015 13:41:14 +0000</created>
                <updated>Wed, 11 Oct 2017 10:24:44 +0000</updated>
                            <resolved>Fri, 25 Sep 2015 00:09:06 +0000</resolved>
                                                    <fixVersion>3.1.9</fixVersion>
                                    <component>Querying</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1695640" author="jg1" created="Wed, 11 Oct 2017 10:24:44 +0000"  >&lt;p&gt;not convinced this is fully working as expected, raised &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31511&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-31511&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1042876" author="xgen-internal-githook" created="Fri, 25 Sep 2015 00:07:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19842&quot; title=&quot;Support allowPartialResults in new mongos read path&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19842&quot;&gt;&lt;del&gt;SERVER-19842&lt;/del&gt;&lt;/a&gt; support allowPartialResults query option in new mongos read path&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/549d1080fe68fdef42182d4a4189fdd70f964eaf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/549d1080fe68fdef42182d4a4189fdd70f964eaf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1024038" author="david.storch" created="Tue, 8 Sep 2015 13:46:29 +0000"  >&lt;p&gt;As part of this work, tests disabled in &lt;a href=&quot;https://github.com/mongodb/mongo/commit/8ec64f2f8dfc71080c9f502fbc750677fadff553&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;8ec64f2f8dfc&lt;/a&gt; need to be re-enabled. (Grep for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19842&quot; title=&quot;Support allowPartialResults in new mongos read path&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19842&quot;&gt;&lt;del&gt;SERVER-19842&lt;/del&gt;&lt;/a&gt;.)&lt;/p&gt;</comment>
                            <comment id="1024034" author="xgen-internal-githook" created="Tue, 8 Sep 2015 13:43:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19842&quot; title=&quot;Support allowPartialResults in new mongos read path&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19842&quot;&gt;&lt;del&gt;SERVER-19842&lt;/del&gt;&lt;/a&gt; disable tests&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8ec64f2f8dfc71080c9f502fbc750677fadff553&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8ec64f2f8dfc71080c9f502fbc750677fadff553&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1021802" author="xgen-internal-githook" created="Thu, 3 Sep 2015 17:30:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19842&quot; title=&quot;Support allowPartialResults in new mongos read path&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19842&quot;&gt;&lt;del&gt;SERVER-19842&lt;/del&gt;&lt;/a&gt; rename &apos;partial&apos; find command parameter to &apos;allowPartialResults&apos;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/968c2eb3e46d1fa75ad1c6bbfde6172bbaddc830&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/968c2eb3e46d1fa75ad1c6bbfde6172bbaddc830&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="333895">SERVER-27170</issuekey>
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