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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>[DOCS-1205] Procedure on &quot;Change Hostnames in a Replica Set&quot; has an error</title>
                <link>https://jira.mongodb.org/browse/DOCS-1205</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;At &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/change-hostnames-in-a-replica-set/#changing-hostnames-while-maintaining-the-replica-set-s-availability&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/tutorial/change-hostnames-in-a-replica-set/#changing-hostnames-while-maintaining-the-replica-set-s-availability&lt;/a&gt;, there is an error in step 5. It doesn&apos;t make sense to start up the original primary (it&apos;s not needed anymore).&lt;/p&gt;

&lt;p&gt;I replaced the steps 3-5 with the following for a customer:&lt;/p&gt;

&lt;p&gt;...&lt;br/&gt;
3. When the step down succeeds, shut down the old primary.&lt;br/&gt;
4. Start the node that will replace the old primary in the new location&lt;br/&gt;
5. To make the final configuration change, connect to the current primary in the mongo shell and reconfigure the host value to replace the old node with the new one. If the old primary was at position 0, you would run:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 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;cfg = rs.conf()&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&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;cfg.members[0].host = &quot;mongodb0.example.net:27017&quot;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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;rs.reconfig(cfg)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;...&lt;/p&gt;

&lt;p&gt;Note how step 4 became the new step 5 and the replacement node should be started before the config change to not get errors about it being unreachable.&lt;/p&gt;

&lt;p&gt;I think step 1d. should also be changed as the secondary is not always at position 1 in the array. I would make this clearer. Something like &quot;If the old node was at position 1, you would run: ...&quot;. &lt;/p&gt;</description>
                <environment></environment>
        <key id="67578">DOCS-1205</key>
            <summary>Procedure on &quot;Change Hostnames in a Replica Set&quot; has an error</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="bgrabar">Bob Grabar</assignee>
                                    <reporter username="thomas.rueckstiess@mongodb.com">Thomas Rueckstiess</reporter>
                        <labels>
                    </labels>
                <created>Thu, 7 Mar 2013 00:44:53 +0000</created>
                <updated>Fri, 13 Sep 2013 02:50:26 +0000</updated>
                            <resolved>Wed, 11 Sep 2013 13:58:55 +0000</resolved>
                                                                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="422989" author="auto" created="Wed, 11 Sep 2013 21:02:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;tychoish&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-1205&quot; title=&quot;Procedure on &amp;quot;Change Hostnames in a Replica Set&amp;quot; has an error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-1205&quot;&gt;&lt;del&gt;DOCS-1205&lt;/del&gt;&lt;/a&gt;: edits&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/61eafd7b604b2925740bffc2c8fe83b87b66e2b7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/61eafd7b604b2925740bffc2c8fe83b87b66e2b7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="422988" author="auto" created="Wed, 11 Sep 2013 21:02:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;bgrabar&apos;, u&apos;name&apos;: u&apos;Bob Grabar&apos;, u&apos;email&apos;: u&apos;bob.grabar@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-1205&quot; title=&quot;Procedure on &amp;quot;Change Hostnames in a Replica Set&amp;quot; has an error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-1205&quot;&gt;&lt;del&gt;DOCS-1205&lt;/del&gt;&lt;/a&gt; change hostname in a replica set&lt;/p&gt;

&lt;p&gt;Signed-off-by: Sam Kleinman &amp;lt;samk@10gen.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/c3928fe9ebb89d2f67368ab295b9ebdd28b3ab04&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/c3928fe9ebb89d2f67368ab295b9ebdd28b3ab04&lt;/a&gt;&lt;/p&gt;</comment>
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