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    <title>MongoDB Jira</title>
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    <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-48676] Create reshardCollection command on router</title>
                <link>https://jira.mongodb.org/browse/SERVER-48676</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;ul&gt;
	&lt;li&gt;Add required input parameter validation.&lt;/li&gt;
	&lt;li&gt;Add unit tests&lt;/li&gt;
	&lt;li&gt;Add integration tests.&lt;/li&gt;
&lt;/ul&gt;


&lt;h3&gt;&lt;a name=&quot;StepOne%3ACreatingthecommandfiles.&quot;&gt;&lt;/a&gt;Step One: Creating the command files.&lt;/h3&gt;
&lt;ol&gt;
	&lt;li&gt;Take the schema defined in the technical design for the project. Translate it to an IDL file, and place it in src/mongo/s/request_types/reshard_collection.idl&lt;/li&gt;
	&lt;li&gt;Create a corresponding C++ command file in src/mongo/s/commands/cluster_reshard_collection_cmd.cpp. This command may just return true for now.&lt;/li&gt;
	&lt;li&gt;Make a Javascript test that calls this command and asserts that it returns true. This won&apos;t be something that&apos;s going to be pushed in its state, but may serve as a stub to verify that your code is working properly while you&apos;re building up this command.&lt;/li&gt;
&lt;/ol&gt;


&lt;h3&gt;&lt;a name=&quot;StepTwo%3AAddinginputvalidation.&quot;&gt;&lt;/a&gt;Step Two: Adding input validation.&lt;/h3&gt;
&lt;ul&gt;
	&lt;li&gt;Ensure that the namespace entered follows valid namespace rules. There should be other commands that validate this that you can copy from.&lt;/li&gt;
	&lt;li&gt;Ensure that the namespace conforms to a collection that exists and is sharded. This may be done by checking the collection&apos;s routing info through the CatalogCache object. Let &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=blake.oler&quot; class=&quot;user-hover&quot; rel=&quot;blake.oler&quot;&gt;blake.oler&lt;/a&gt; know if you need help on this.&lt;/li&gt;
	&lt;li&gt;Verify that if &lt;tt&gt;unique&lt;/tt&gt; is specified, that it is false.&lt;/li&gt;
	&lt;li&gt;Locally populate &lt;tt&gt;numInitialChunks&lt;/tt&gt; to be the existing number of chunks in the original collection if it is not specified. This information can also be extracted from the collection&apos;s routing info through the CatalogCache object.&lt;/li&gt;
	&lt;li&gt;Verify that the collation is set to 
{ locale: &quot;simple&quot; }
&lt;p&gt; if specified. You may want to set this to a string/other constant in the command file to avoid a magic string.&lt;/p&gt;&lt;/li&gt;
	&lt;li&gt;Verify that if _presetReshardedChunks is set, that test commands are enabled. This should be a global variable, do a grep/search for testCommandsEnabled or something similar.&lt;/li&gt;
&lt;/ul&gt;


&lt;h3&gt;&lt;a name=&quot;StepThree%3ACreatingintegrationtests&quot;&gt;&lt;/a&gt;Step Three: Creating integration tests&lt;/h3&gt;
&lt;ul&gt;
	&lt;li&gt;Create tests verifying that the input validation is correctly followed.&lt;/li&gt;
&lt;/ul&gt;



</description>
                <environment></environment>
        <key id="1376441">SERVER-48676</key>
            <summary>Create reshardCollection command on router</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="13201">Fixed</resolution>
                                        <assignee username="kshitij.gupta@mongodb.com">Kshitij Gupta</assignee>
                                    <reporter username="blake.oler@mongodb.com">Blake Oler</reporter>
                        <labels>
                            <label>PM-234-M1</label>
                            <label>PM-234-T-lifecycle</label>
                    </labels>
                <created>Tue, 9 Jun 2020 19:50:22 +0000</created>
                <updated>Sun, 29 Oct 2023 22:07:16 +0000</updated>
                            <resolved>Thu, 2 Jul 2020 15:17:33 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3268686" author="xgen-internal-githook" created="Thu, 2 Jul 2020 16:23:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kshitij Gupta&apos;, &apos;email&apos;: &apos;kshitij.gupta@mongodb.com&apos;, &apos;username&apos;: &apos;kshitijng&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48676&quot; title=&quot;Create reshardCollection command on router&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48676&quot;&gt;&lt;del&gt;SERVER-48676&lt;/del&gt;&lt;/a&gt;: Create reshardCollection command on router.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2bdac781a19690e80880bd1c7b22f1d0d3d2b7b2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2bdac781a19690e80880bd1c7b22f1d0d3d2b7b2&lt;/a&gt;&lt;/p&gt;</comment>
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