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    <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-14547] sharding health check for config server</title>
                <link>https://jira.mongodb.org/browse/SERVER-14547</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi team,&lt;br/&gt;
in mongodb sharding we have either 1 or 3 config server , if any one down all write load goes to first shard correct ? during that period no chunk migration is going on.&lt;/p&gt;

&lt;p&gt;lets my one config server down and somehow I am unable to check my shard health then all chunk is written on first shard that is bad .&lt;br/&gt;
is there is any such function available to identify config server health or availability.&lt;/p&gt;</description>
                <environment></environment>
        <key id="146895">SERVER-14547</key>
            <summary>sharding health check for config server</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="rajnish4mongodb">Rajnish Kumar</reporter>
                        <labels>
                    </labels>
                <created>Mon, 14 Jul 2014 06:18:49 +0000</created>
                <updated>Mon, 14 Jul 2014 14:04:52 +0000</updated>
                            <resolved>Mon, 14 Jul 2014 14:04:51 +0000</resolved>
                                    <version>2.6.3</version>
                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="657984" author="stennie" created="Mon, 14 Jul 2014 14:04:52 +0000"  >&lt;p&gt;Hi Rajnish,&lt;/p&gt;

&lt;p&gt;You should always &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/deploy-config-servers/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;deploy exactly three config servers&lt;/a&gt; for production deployments.&lt;/p&gt;

&lt;p&gt;The config servers use a two-phase commit to ensure consistency. If there are differences in essential metadata between config servers (or one or two config servers are unavailable), the cluster&apos;s metadata will become read only until the problem is remedied. For more information please see &lt;a href=&quot;http://docs.mongodb.org/manual/core/sharded-cluster-config-servers/#config-server-availability&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Config Server Availability&lt;/a&gt; in the MongoDB manual.&lt;/p&gt;

&lt;p&gt;Please also note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion, please post on the mongodb-users group (&lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://groups.google.com/group/mongodb-user&lt;/a&gt;) or Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Stephen&lt;/p&gt;</comment>
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