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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-29858] allow Shard::exhaustiveFindOnConfig to run on shards as well, and rename to Shard::exhaustiveFind</title>
                <link>https://jira.mongodb.org/browse/SERVER-29858</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For the first time, the config server needs to run a command (listCollections) against a shard that returns a cursor.&lt;/p&gt;

&lt;p&gt;The alternatives are to use DBClient::query or link establishCursors() and the ARM/ClusterClientCursor onto mongod, which is an entire summer 2017 intern project.&lt;/p&gt;

&lt;p&gt;We should replace the plumbing of ShardRemote::exhaustiveFind with establishCursors/ARM once they are linked into mongod, so that we can do a clean replace of the Fetcher with those with one change.&lt;/p&gt;</description>
                <environment></environment>
        <key id="398212">SERVER-29858</key>
            <summary>allow Shard::exhaustiveFindOnConfig to run on shards as well, and rename to Shard::exhaustiveFind</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="esha.maharishi@mongodb.com">Esha Maharishi</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Mon, 26 Jun 2017 17:30:08 +0000</created>
                <updated>Fri, 23 Feb 2018 16:33:14 +0000</updated>
                            <resolved>Fri, 23 Feb 2018 16:33:13 +0000</resolved>
                                    <version>3.5.9</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1814365" author="esha.maharishi@10gen.com" created="Fri, 23 Feb 2018 16:32:52 +0000"  >&lt;p&gt;Eh... I think I filed this when moving shardCollection to the config server (shardCollection calls listCollections against the shard being added), because I wanted to update &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.13/src/mongo/s/commands/cluster_shard_collection_cmd.cpp#L294&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this listCollections call&lt;/a&gt; from using legacy networking to ASIO.&lt;/p&gt;

&lt;p&gt;The only options we had were&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;make Shard::exhaustiveFindOnConfig, which can run cursor-generating commands over ASIO, runnable on shards&lt;/li&gt;
	&lt;li&gt;use establishCursors/ARM&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I ended up doing neither and just left it as using legacy networking from the config server, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.7.2/src/mongo/db/s/config/configsvr_shard_collection_command.cpp#L194&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;as seen in 3.7.2&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;So, yeah, closing as Won&apos;t Fix until we have a reason to attempt it again.&lt;/p&gt;</comment>
                            <comment id="1814350" author="greg.mckeon" created="Fri, 23 Feb 2018 16:25:46 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=esha.maharishi&quot; class=&quot;user-hover&quot; rel=&quot;esha.maharishi&quot;&gt;esha.maharishi&lt;/a&gt; is this still necessary?&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
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            <issuekey id="398220">SERVER-29859</issuekey>
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