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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-13694] Config server consistency check command</title>
                <link>https://jira.mongodb.org/browse/SERVER-13694</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It would be good to have a convenient and foolproof way to check the consistency of the config servers in a sharded cluster.&lt;/p&gt;

&lt;p&gt;Currently, the only indication that config servers are out of sync is the following message in the logs:&lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[mongosMain] ERROR: config servers not in sync! config servers config1.example.net:27019 and config3.example.net:27019 differ&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;The &lt;tt&gt;dbHash&lt;/tt&gt; command can be used to compare the contents of config servers, but requires careful interpretation as some collections are expected to differ between config servers whereas others must not.&lt;/p&gt;

&lt;p&gt;A command that could be run from a mongos to check config server consistency would be a good thing.  Additionally, this command should report whether config servers are in &apos;read-only&apos; mode (due to inconsistency or a config server being down), to give users confidence that the cluster meta-data is not updatable during critical operations such as cluster backup or restoration of a config server.&lt;/p&gt;</description>
                <environment></environment>
        <key id="132782">SERVER-13694</key>
            <summary>Config server consistency check command</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="jon.rangel@mongodb.com">Jon Rangel</reporter>
                        <labels>
                    </labels>
                <created>Wed, 23 Apr 2014 10:10:41 +0000</created>
                <updated>Tue, 6 Dec 2022 05:07:18 +0000</updated>
                            <resolved>Thu, 3 Jan 2019 15:58:58 +0000</resolved>
                                                                    <component>Diagnostics</component>
                    <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="2104335" author="kaloian.manassiev" created="Thu, 3 Jan 2019 15:58:58 +0000"  >&lt;p&gt;This is no longer necessary now that we have CSRS.&lt;/p&gt;</comment>
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