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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-11048] Clarify the steps to restore database to a single node replica set using the back files from file system snapshot</title>
                <link>https://jira.mongodb.org/browse/DOCS-11048</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;The steps to &lt;a href=&quot;https://docs.mongodb.com/manual/tutorial/restore-replica-set-from-backup/#restore-database-into-a-single-node-replica-set&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Restore Database into a Single Node Replica Set&lt;/a&gt; include to initiate the new replica set.&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;For snapshot from Cloud Manager or Ops Manager, the steps work as the CM/OM don&apos;t backup the &lt;tt&gt;local&lt;/tt&gt; database, hence the replica set configuration doesn&apos;t exist in the snapshot.&lt;/li&gt;
	&lt;li&gt;However for filesystem snapshot, all the data files are backed up, including the &lt;tt&gt;local&lt;/tt&gt; database. When we try to initiate the new replica set while the replica set configuration already exists in the local database, the initialization fails:
&lt;p/&gt;
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					&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;{&lt;/span&gt;&lt;/pre&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;   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;info&quot; : &quot;try querying local.system.replset to see current configuration&quot;,&lt;/span&gt;&lt;/pre&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;   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;already initialized&quot;,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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;   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;code&quot; : 23,&lt;/span&gt;&lt;/pre&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;   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;codeName&quot; : &quot;AlreadyInitialized&quot;&lt;/span&gt;&lt;/pre&gt;
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			&lt;/td&gt;
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			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;So to restore the databases from a file system snapshot to a new replica set, there are some additional steps required before initializing the replica set. The overall steps should be:&lt;br/&gt;
1. Obtain backup MongoDB Database files from filesystem snapshot.&lt;br/&gt;
2. Start a standalone mongod instance.&lt;br/&gt;
3. Drop the &lt;tt&gt;local&lt;/tt&gt; database.&lt;br/&gt;
4. Restart the mongod instance with --replSet option.&lt;br/&gt;
5. Initiate the new replica set. &lt;/p&gt;</description>
                <environment></environment>
        <key id="462679">DOCS-11048</key>
            <summary>Clarify the steps to restore database to a single node replica set using the back files from file system snapshot</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="13201">Fixed</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="linda.qin@mongodb.com">Linda Qin</reporter>
                        <labels>
                    </labels>
                <created>Wed, 22 Nov 2017 06:19:32 +0000</created>
                <updated>Mon, 30 Oct 2023 19:35:39 +0000</updated>
                            <resolved>Wed, 4 Apr 2018 13:23:35 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1854828" author="xgen-internal-githook" created="Wed, 4 Apr 2018 13:16:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11048&quot; title=&quot;Clarify the steps to restore database to a single node replica set using the back files from file system snapshot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11048&quot;&gt;&lt;del&gt;DOCS-11048&lt;/del&gt;&lt;/a&gt;: missed line during cherry-pick merge conflict&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/cd28f9f9ffe1ed268282a26540b69472381f76d0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/cd28f9f9ffe1ed268282a26540b69472381f76d0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1854822" author="xgen-internal-githook" created="Wed, 4 Apr 2018 13:14:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11048&quot; title=&quot;Clarify the steps to restore database to a single node replica set using the back files from file system snapshot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11048&quot;&gt;&lt;del&gt;DOCS-11048&lt;/del&gt;&lt;/a&gt;: drop local in restore from fs&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/fd1df98d9569a8df7cdf55c001616996bee57f3f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/fd1df98d9569a8df7cdf55c001616996bee57f3f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1854818" author="xgen-internal-githook" created="Wed, 4 Apr 2018 13:12:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11048&quot; title=&quot;Clarify the steps to restore database to a single node replica set using the back files from file system snapshot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11048&quot;&gt;&lt;del&gt;DOCS-11048&lt;/del&gt;&lt;/a&gt;: drop local in restore from fs&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/39e09cd0659ca01ee89a165675be9e09a5131248&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/39e09cd0659ca01ee89a165675be9e09a5131248&lt;/a&gt;&lt;/p&gt;</comment>
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