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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-18937] Don&apos;t raise startup warnings on missing _id for collections that don&apos;t get replicated</title>
                <link>https://jira.mongodb.org/browse/SERVER-18937</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It is possible for a map/reduce job to be interrupted in such a way that the _id does not exist.  When a node with this issue is restarted, a message similar to the following will appear in startup warnings:&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;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 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; WARNING: the collection &apos;foo.tmp.bar&apos; lacks a unique index on _id. This index is needed for replication to function properly&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;Since this collection is never going to be replicated (temporary mr collection - &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-13981&quot; title=&quot;Temporary map/reduce collections are incorrectly replicated to secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-13981&quot;&gt;&lt;del&gt;SERVER-13981&lt;/del&gt;&lt;/a&gt;) there should not be a warning about it not being able to replicate properly&lt;/p&gt;</description>
                <environment></environment>
        <key id="210132">SERVER-18937</key>
            <summary>Don&apos;t raise startup warnings on missing _id for collections that don&apos;t get replicated</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="andre.defrere@mongodb.com">Andre de Frere</reporter>
                        <labels>
                    </labels>
                <created>Thu, 11 Jun 2015 22:38:06 +0000</created>
                <updated>Tue, 6 Dec 2022 04:50:00 +0000</updated>
                                            <version>3.0.3</version>
                                                    <component>Admin</component>
                                        <votes>2</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="938772" author="milkie" created="Fri, 12 Jun 2015 12:18:30 +0000"  >&lt;p&gt;It might be the case that at startup, we do the tmp-collection cleanup phase after we do the missing _id detection phase.  So if we swapped the order, that would fix this issue.&lt;/p&gt;</comment>
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