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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
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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-35731] Prevent a repaired node from re-joining a replica set </title>
                <link>https://jira.mongodb.org/browse/SERVER-35731</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When MongoDB is started with &lt;tt&gt;--repair&lt;/tt&gt;, the repair process will attempt to salvage data at the expense of potential data loss so that MongoDB can be started normally.&lt;/p&gt;

&lt;p&gt;If a user is unaware they have lost data, they may attempt to add the node back to its original replica set. In the worst-case scenario, this node will become primary and data will appear to go missing.&lt;/p&gt;

&lt;p&gt;There are currently no measures in place to prevent a secondary with data modified offline from re-joining its original replica set (even without repair).&lt;/p&gt;

&lt;p&gt;Solution: If repair modifies storage metadata or collections (not indexes), repair will add a top-level field &quot;repaired: true&quot; to the local.system.replset configuration document. This will invalidate the document and prevent the node from re-joining as a member of the replica set. When the server starts up again normally, a warning will be printed with instructions for performing a re-sync.&lt;/p&gt;

&lt;p&gt;Additionally, if a repair operation fails for any reason, the node will be unable to start up again without the --repair option. The presence of a &quot;_repair_incomplete&quot; file in the dbpath indicates that a repair operation did not complete, and will prevent a mongod from starting up.&lt;/p&gt;</description>
                <environment></environment>
        <key id="562682">SERVER-35731</key>
            <summary>Prevent a repaired node from re-joining a replica set </summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="louis.williams@mongodb.com">Louis Williams</reporter>
                        <labels>
                            <label>nyc</label>
                    </labels>
                <created>Thu, 21 Jun 2018 20:11:06 +0000</created>
                <updated>Sun, 29 Oct 2023 22:30:32 +0000</updated>
                            <resolved>Fri, 17 Aug 2018 20:23:42 +0000</resolved>
                                                    <fixVersion>4.0.3</fixVersion>
                    <fixVersion>4.1.3</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2006511" author="xgen-internal-githook" created="Tue, 18 Sep 2018 14:51:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Louis Williams&apos;, &apos;email&apos;: &apos;louis.williams@mongodb.com&apos;, &apos;username&apos;: &apos;louiswilliams&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35731&quot; title=&quot;Prevent a repaired node from re-joining a replica set &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35731&quot;&gt;&lt;del&gt;SERVER-35731&lt;/del&gt;&lt;/a&gt; Prevent a repaired node from re-joining a replica set&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 17686781044525b9c3fbdf06ca326c8f4fb383ba)&lt;/p&gt;

&lt;p&gt;Conflicts:&lt;br/&gt;
    src/mongo/base/error_codes.err&lt;br/&gt;
    src/mongo/db/repair_database_and_check_version.cpp&lt;br/&gt;
    src/mongo/db/storage/SConscript&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d4be161a6010b7ce37bca91ae5b9a9485ca07cac&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d4be161a6010b7ce37bca91ae5b9a9485ca07cac&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1979292" author="xgen-internal-githook" created="Fri, 17 Aug 2018 20:14:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Louis Williams&apos;, &apos;email&apos;: &apos;louis.williams@mongodb.com&apos;, &apos;username&apos;: &apos;louiswilliams&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35731&quot; title=&quot;Prevent a repaired node from re-joining a replica set &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35731&quot;&gt;&lt;del&gt;SERVER-35731&lt;/del&gt;&lt;/a&gt; Prevent a repaired node from re-joining a replica set&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/17686781044525b9c3fbdf06ca326c8f4fb383ba&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/17686781044525b9c3fbdf06ca326c8f4fb383ba&lt;/a&gt;&lt;/p&gt;</comment>
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