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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-11982] connection error when doing sharded cluster upgrade following recommended procedure</title>
                <link>https://jira.mongodb.org/browse/SERVER-11982</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The recommended process for doing a sharded cluster version upgrade is:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Upgrade mongos (with &lt;tt&gt;--upgrade&lt;/tt&gt;)&lt;/li&gt;
	&lt;li&gt;Upgrade shards&lt;/li&gt;
	&lt;li&gt;Upgrade config servers&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;However, when running this for a 2.4 to 2.5 version upgrade, the following error is thrown when a client (e.g. a mongo process) attempts to run the &lt;tt&gt;authSchemaUpgradeStep&lt;/tt&gt; command on the admin database.&lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 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;	&quot;errmsg&quot; : &quot;SyncClusterConnection::update prepare failed:  localhost.mongodb.com:29001:10276 DBClientBase::findN: transport error: localhost.mongodb.com:29001 ns: admin.$cmd query: { resetError: 1 } localhost.mongodb.com:29002:10276 DBClientBase::findN: transport error: localhost.mongodb.com:29002 ns: admin.$cmd query: { resetError: 1 }&quot;,&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;However if the order is changed a bit:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Upgrade shards&lt;/li&gt;
	&lt;li&gt;Upgrade config servers&lt;/li&gt;
	&lt;li&gt;Upgrade mongos (with &lt;tt&gt;--upgrade&lt;/tt&gt;)&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;There are no issues upgrading in this order.&lt;/p&gt;</description>
                <environment></environment>
        <key id="101337">SERVER-11982</key>
            <summary>connection error when doing sharded cluster upgrade following recommended procedure</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="9">Done</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="adinoyi.omuya@mongodb.com">Adinoyi Omuya</reporter>
                        <labels>
                            <label>26qa</label>
                    </labels>
                <created>Thu, 5 Dec 2013 22:38:57 +0000</created>
                <updated>Mon, 10 Mar 2014 00:14:47 +0000</updated>
                            <resolved>Tue, 11 Feb 2014 22:42:32 +0000</resolved>
                                    <version>2.5.4</version>
                                    <fixVersion>2.6.0-rc0</fixVersion>
                                    <component>Admin</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="497457" author="renctan" created="Tue, 11 Feb 2014 22:42:32 +0000"  >&lt;p&gt;Note: if you follow the recommended procedure, you need to call connPoolSync against the mongos before running authSchemaUpgrade&lt;/p&gt;</comment>
                            <comment id="497455" author="xgen-internal-githook" created="Tue, 11 Feb 2014 22:40:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-11982&quot; title=&quot;connection error when doing sharded cluster upgrade following recommended procedure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-11982&quot;&gt;&lt;del&gt;SERVER-11982&lt;/del&gt;&lt;/a&gt; connection error when doing sharded cluster upgrade following recommended procedure&lt;/p&gt;

&lt;p&gt;Make connPoolSync clear all global connection pools&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8a2536ddf2933e90c41ef5567aa6fbb0029547e9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8a2536ddf2933e90c41ef5567aa6fbb0029547e9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="497454" author="xgen-internal-githook" created="Tue, 11 Feb 2014 22:40:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-11982&quot; title=&quot;connection error when doing sharded cluster upgrade following recommended procedure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-11982&quot;&gt;&lt;del&gt;SERVER-11982&lt;/del&gt;&lt;/a&gt; connection error when doing sharded cluster upgrade following recommended procedure&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/228c5a2e27cdaf35e1ac7e0a097d8172f7f4a387&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/228c5a2e27cdaf35e1ac7e0a097d8172f7f4a387&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="493291" author="renctan" created="Tue, 4 Feb 2014 20:33:17 +0000"  >&lt;p&gt;To workaround this issue, the upgrade procedure should be done as follows:&lt;/p&gt;

&lt;p&gt;1. Upgrade config server binaries.&lt;br/&gt;
2. Upgrade mongos with --upgrade&lt;br/&gt;
3. Upgrade shards&lt;br/&gt;
4. Run connPoolSync on mongos at step 2.&lt;br/&gt;
5. Run authSchemaUpgradeStep on mongos at step 2.&lt;/p&gt;</comment>
                            <comment id="470232" author="valeri.karpov" created="Thu, 12 Dec 2013 22:57:48 +0000"  >&lt;p&gt;I can confirm that I&apos;ve had a similar issue&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                                        <issuelink>
            <issuekey id="109607">DOCS-2659</issuekey>
        </issuelink>
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                                                        </issuelinktype>
                            <issuelinktype id="10010">
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                                        <issuelink>
            <issuekey id="104385">SERVER-12234</issuekey>
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        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="30036">SERVER-4887</issuekey>
        </issuelink>
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