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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-31414] The writes of _configsvrEnableSharding to config.databases do not use local write concern</title>
                <link>https://jira.mongodb.org/browse/SERVER-31414</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;ShardLocal&lt;/tt&gt; is given a &lt;tt&gt;Shard::RetryPolicy::kIdempotent&lt;/tt&gt; retry policy for the config.databases write, where WriteConcernError is a retryable error (see &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e977f79fb37f7c6608bcfa7df81932b302285a57/src/mongo/client/remote_command_retry_scheduler.cpp#L110&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;remote_command_retry_scheduler.cpp&lt;/a&gt;. However, it runs into a DuplicateKeyError when it retries the write. See BF-6713 for details of the failure.&lt;/p&gt;

&lt;p&gt;I hypothesize that the issue is that ShardLocal/CatalogClient uses majority write/read concern, and instead it should use local and then mongos should call _configsvrEnableSharding with majority write concern so it waits after the write. Might want to make sure the mongos can deal with the WriteConcernError properly, so the config stepdown suite doesn&apos;t fail loudly.&lt;/p&gt;</description>
                <environment></environment>
        <key id="441188">SERVER-31414</key>
            <summary>The writes of _configsvrEnableSharding to config.databases do not use local write concern</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                            <label>ShardingTechDebt</label>
                    </labels>
                <created>Thu, 5 Oct 2017 16:47:45 +0000</created>
                <updated>Tue, 6 Dec 2022 03:50:04 +0000</updated>
                            <resolved>Tue, 22 May 2018 14:39:53 +0000</resolved>
                                    <version>3.6.3</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1690889" author="dianna.hohensee" created="Thu, 5 Oct 2017 21:31:28 +0000"  >&lt;p&gt;Another proposal is to change the idempotent retry policy to no retry policy, when run on config servers. Easier, less correct.&lt;/p&gt;</comment>
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