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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-45502] The FCV 4.4 migration protocol does not work on shards with storage engines that do not support document-level locking</title>
                <link>https://jira.mongodb.org/browse/SERVER-45502</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The FCV 4.4 migration protocol involves doing a retryable write against the recipient shard, and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5ebed8698873294ec0dc98395787d3caafa8b6af/src/mongo/db/initialize_operation_session_info.cpp#L113-L116&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;retryable writes are not supported on storage engines that do not have document-level locking&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;This ticket is to check whether we still support running shard servers on storage engines without document-level locking.&lt;/p&gt;

&lt;p&gt;If it&apos;s not supported, the ticket should figure out what to do about sharding tests that do migrations with the ephemeralForTest storage engine.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1084514">SERVER-45502</key>
            <summary>The FCV 4.4 migration protocol does not work on shards with storage engines that do not support document-level locking</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="esha.maharishi@mongodb.com">Esha Maharishi</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Fri, 10 Jan 2020 20:25:42 +0000</created>
                <updated>Sun, 29 Oct 2023 22:13:25 +0000</updated>
                            <resolved>Wed, 15 Jan 2020 18:21:23 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2732273" author="xgen-internal-githook" created="Wed, 15 Jan 2020 18:18:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Esha Maharishi&apos;, &apos;email&apos;: &apos;esha.maharishi@mongodb.com&apos;, &apos;username&apos;: &apos;EshaMaharishi&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45502&quot; title=&quot;The FCV 4.4 migration protocol does not work on shards with storage engines that do not support document-level locking&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45502&quot;&gt;&lt;del&gt;SERVER-45502&lt;/del&gt;&lt;/a&gt; The FCV 4.4 migration protocol does not work on shards with storage engines that do not support document-level locking&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b5ca171828cf00dd7aab93360e2b7b30cf73f770&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b5ca171828cf00dd7aab93360e2b7b30cf73f770&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2719465" author="esha.maharishi@10gen.com" created="Fri, 10 Jan 2020 21:00:15 +0000"  >&lt;p&gt;Confirmed with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=alyson1127&quot; class=&quot;user-hover&quot; rel=&quot;alyson1127&quot;&gt;alyson1127&lt;/a&gt; that shard servers are required to have a storage engine that supports document-level locking. The only storage engines we claim to support on &lt;a href=&quot;https://docs.mongodb.com/manual/core/storage-engines/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt; public docs page are WiredTiger and inMemory, which both support document-level locking.&lt;/p&gt;</comment>
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            <issuekey id="1150446">SERVER-46178</issuekey>
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