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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-43918] Upgrade/downgrade process for compound hashed shard keys</title>
                <link>https://jira.mongodb.org/browse/SERVER-43918</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As distinct from &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43913&quot; title=&quot;Multiversion tests for compound hashed indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43913&quot;&gt;&lt;del&gt;SERVER-43913&lt;/del&gt;&lt;/a&gt;, this should test the behaviour of compound hashed shard keys in a mixed-version cluster.&lt;/p&gt;</description>
                <environment></environment>
        <key id="965869">SERVER-43918</key>
            <summary>Upgrade/downgrade process for compound hashed shard keys</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="arun.banala@mongodb.com">Arun Banala</assignee>
                                    <reporter username="bernard.gorman@mongodb.com">Bernard Gorman</reporter>
                        <labels>
                    </labels>
                <created>Wed, 9 Oct 2019 16:04:42 +0000</created>
                <updated>Sun, 29 Oct 2023 22:16:15 +0000</updated>
                            <resolved>Fri, 17 Jan 2020 20:52:39 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="2747477" author="xgen-internal-githook" created="Tue, 21 Jan 2020 16:39:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;banarun&apos;, &apos;name&apos;: &apos;Arun Banala&apos;, &apos;email&apos;: &apos;arun.banala@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43918&quot; title=&quot;Upgrade/downgrade process for compound hashed shard keys&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43918&quot;&gt;&lt;del&gt;SERVER-43918&lt;/del&gt;&lt;/a&gt; Fix &apos;compound_hashed_shard_key.js&apos; test flakiness&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b5cb09ec2f7baef7d8ec776815754f5e6e6d459a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b5cb09ec2f7baef7d8ec776815754f5e6e6d459a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2740047" author="xgen-internal-githook" created="Fri, 17 Jan 2020 20:41:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;banarun&apos;, &apos;name&apos;: &apos;banarun&apos;, &apos;email&apos;: &apos;arun.banala@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43918&quot; title=&quot;Upgrade/downgrade process for compound hashed shard keys&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43918&quot;&gt;&lt;del&gt;SERVER-43918&lt;/del&gt;&lt;/a&gt; Upgrade/downgrade process for compound hashed shard keys&lt;/p&gt;

&lt;p&gt; create mode 100644 jstests/multiVersion/compound_hashed_shard_key.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/440164e31db3547b892d8d11d8623d48de654964&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/440164e31db3547b892d8d11d8623d48de654964&lt;/a&gt;&lt;/p&gt;</comment>
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                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="965862">SERVER-43916</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="965866">SERVER-43917</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="1059863">SERVER-45234</issuekey>
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                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="1106758">DOCS-13356</issuekey>
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                            <customfieldvalue>The users need to drop all the collections with compound hashed shard key before initiating a downgrade process. The setFCV command to 4.2 from 4.4 will fail with a warning if such a collection exists. </customfieldvalue>

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