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    <title>MongoDB Jira</title>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-14573] Why my cluster is imbalance&#65311;</title>
                <link>https://jira.mongodb.org/browse/SERVER-14573</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello,I am a user from China. I&apos;m sorry my English is not good,but I will try my best to describe my problem clearly.&lt;/p&gt;

&lt;p&gt;I have a cluster with 3 shards 3 config servers and 3 mongos.The dataset size is about 1T.I have may database and collections on this cluster.but almost all of the collectiosns is imbalance.The chunks moves very Slowly.&lt;/p&gt;

&lt;p&gt;I check the logs,there are some problems:&lt;br/&gt;
&#12304;warning:config servers A and B differ&#12305; this warning appears very often.&lt;br/&gt;
&#12304;ERROR: config servers not in sync !&#12305;&lt;br/&gt;
&#12304;when split chunk:the collection&apos;s metadata lock is taken&#12305;&lt;/p&gt;

&lt;p&gt;I don&apos;t know what causes these problems occur.I hope to get help!&lt;br/&gt;
Thank you very much&lt;/p&gt;</description>
                <environment></environment>
        <key id="147391">SERVER-14573</key>
            <summary>Why my cluster is imbalance&#65311;</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="ramon.fernandez@mongodb.com">Ramon Fernandez Marina</assignee>
                                    <reporter username="gaoyuanopenfire">GaoYuan</reporter>
                        <labels>
                    </labels>
                <created>Wed, 16 Jul 2014 00:49:49 +0000</created>
                <updated>Wed, 10 Dec 2014 23:19:24 +0000</updated>
                            <resolved>Wed, 16 Jul 2014 15:40:23 +0000</resolved>
                                                                    <component>Admin</component>
                                        <votes>0</votes>
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                                                                                                                <comments>
                            <comment id="660644" author="ramon.fernandez" created="Wed, 16 Jul 2014 15:40:02 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=gaoyuanopenfire&quot; class=&quot;user-hover&quot; rel=&quot;gaoyuanopenfire&quot;&gt;gaoyuanopenfire&lt;/a&gt;, your cluster is not balanced because the config servers are out of sync, as the logs point out. You&apos;ll need to replace the offending config server to fix your cluster. Here&apos;s some documentation on &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/replace-config-server/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;replacing a config server&lt;/a&gt;, and also some instructions on &lt;a href=&quot;http://dba.stackexchange.com/questions/48232/mongodb-config-servers-not-in-sync&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;fixing out-of-sync config servers&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;That being said, note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server and tools. For MongoDB-related support discussion please post on the &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;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;. A question like this involving more discussion would be best posted on the mongodb-user group. &lt;/p&gt;</comment>
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