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<channel>
    <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>
    </build-info>


<item>
            <title>[SERVER-60064] Make create command idempotent on mongod</title>
                <link>https://jira.mongodb.org/browse/SERVER-60064</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Previously, mongod would return an error if you attempted to create a collection or view that already existed. However, mongos would report success if the collection/view already existed with the same exact options you were attempting to create it with. The mongod behavior now matches the mongos behavior, i.e. on both mongod and mongos the create command is idempotent and will report success if an identical collection/view already exists, meaning it is safe to re-run the command even if it may have succeeded previously.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Original ticket description&lt;/b&gt;:&lt;/p&gt;

&lt;p&gt;Related to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33276&quot; title=&quot;Creation of already existing collection on a sharded cluster should be an error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33276&quot;&gt;&lt;del&gt;SERVER-33276&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/PYTHON-1936&quot; title=&quot;Remove listCollections check from Database.create_collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;PYTHON-1936&quot;&gt;&lt;del&gt;PYTHON-1936&lt;/del&gt;&lt;/a&gt;. Starting in MongoDB 4.0, the create command does not return an error when the collection already exists on sharded clusters:&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;
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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;&amp;gt;&amp;gt;&amp;gt; client.server_info()[&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;version&apos;&lt;/span&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;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;4.2.3&apos;&lt;/span&gt;&lt;/pre&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;&amp;gt;&amp;gt;&amp;gt; client.is_mongos&lt;/span&gt;&lt;/pre&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: gray; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;True&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;&amp;gt;&amp;gt;&amp;gt; client.test.command(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;create&apos;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;test&apos;&lt;/span&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;, check&lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;=&lt;/span&gt;&lt;span style=&quot;color: gray; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;False&lt;/span&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;{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;ok&apos;&lt;/span&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;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1.0&lt;/span&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;&amp;gt;&amp;gt;&amp;gt; client.test.command(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;create&apos;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;test&apos;&lt;/span&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;, check&lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;=&lt;/span&gt;&lt;span style=&quot;color: gray; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;False&lt;/span&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;   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;{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;ok&apos;&lt;/span&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;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1.0&lt;/span&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;/div&gt;
&lt;p/&gt;
&lt;p&gt;On replica sets and standalones the second create fails with error code 48:&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;   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;&amp;gt;&amp;gt;&amp;gt; client.server_info()[&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;version&apos;&lt;/span&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: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;4.2.3&apos;&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;&amp;gt;&amp;gt;&amp;gt; client.is_mongos&lt;/span&gt;&lt;/pre&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: gray; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;False&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;&amp;gt;&amp;gt;&amp;gt; client.test.command(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;create&apos;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;test&apos;&lt;/span&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;, check&lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;=&lt;/span&gt;&lt;span style=&quot;color: gray; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;False&lt;/span&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;{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;ok&apos;&lt;/span&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;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1.0&lt;/span&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;&amp;gt;&amp;gt;&amp;gt; client.test.command(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;create&apos;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;test&apos;&lt;/span&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;, check&lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;=&lt;/span&gt;&lt;span style=&quot;color: gray; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;False&lt;/span&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;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;{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;ok&apos;&lt;/span&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;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;0.0&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;errmsg&apos;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;a collection &apos;test.test&apos; already exists&quot;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;code&apos;&lt;/span&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;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;48&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;codeName&apos;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;NamespaceExists&apos;&lt;/span&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;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;We should make mongod have the same behavior as mongos for consistency across deployments.&lt;/p&gt;

&lt;p&gt;Another benefit of this change is that it would allow drivers to retry the create command like mongos does.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1877740">SERVER-60064</key>
            <summary>Make create command idempotent on mongod</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="13201">Fixed</resolution>
                                        <assignee username="kaitlin.mahar@mongodb.com">Kaitlin Mahar</assignee>
                                    <reporter username="shane.harvey@mongodb.com">Shane Harvey</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Sep 2021 22:40:11 +0000</created>
                <updated>Sun, 29 Oct 2023 21:48:27 +0000</updated>
                            <resolved>Thu, 16 Feb 2023 18:38:27 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>26</watches>
                                                                                                                <comments>
                            <comment id="5377460" author="dianna.hohensee" created="Wed, 26 Apr 2023 13:55:48 +0000"  >&lt;p&gt;I&apos;ve filed &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-76547&quot; title=&quot;Create command on a time-series collection is not idempotent&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76547&quot;&gt;&lt;del&gt;SERVER-76547&lt;/del&gt;&lt;/a&gt;, to make create command on time-series collections idempotent, as a result of investigating &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73967&quot; title=&quot;Update handling of create command in shouldRetryWithNetworkErrorOverride&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73967&quot;&gt;SERVER-73967&lt;/a&gt; to remove NamespaceExists error handling in our test infrastructure.&lt;/p&gt;

&lt;p&gt;I expect that the Drivers must be able to handle both NamespaceExists and the lack thereof from create commands, since they must be backwards compatible. So I don&apos;t think there&apos;s any further work for them because of this.&lt;/p&gt;</comment>
                            <comment id="5327990" author="milkie" created="Wed, 5 Apr 2023 20:02:36 +0000"  >&lt;p&gt;Since this isn&apos;t particularly visible, I&apos;ve copied the Downstream Changes field here in a comment:&lt;/p&gt;

&lt;p&gt;The create command will now report success on mongod if a collection/view with an identical namespace and options already exists. Note that this was already the behavior on mongos as of MongoDB 4.0.&lt;/p&gt;</comment>
                            <comment id="5271984" author="xgen-internal-githook" created="Tue, 14 Mar 2023 17:43:16 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Kyle Kloberdanz&apos;, &apos;email&apos;: &apos;kyle.kloberdanz@mongodb.com&apos;, &apos;username&apos;: &apos;kkloberdanz&apos;}
&lt;p&gt;Message: Server update caused a break in waterfall (#934)&lt;/p&gt;

&lt;p&gt;Recently, the server changed behavior where creating a collection that&lt;br/&gt;
already exists will not trigger an exception. Instead, replace this test&lt;br/&gt;
with a check that the collection was indeed created. See Jira ticket&lt;br/&gt;
below.&lt;/p&gt;

&lt;p&gt;Jira: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60064&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-60064&lt;/a&gt;&lt;br/&gt;
Branch: releases/stable&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-cxx-driver/commit/c2e6eb42c626620b43ea308db2e21e6888bfa94e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-cxx-driver/commit/c2e6eb42c626620b43ea308db2e21e6888bfa94e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5255573" author="xgen-internal-githook" created="Tue, 7 Mar 2023 15:19:15 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Kyle Kloberdanz&apos;, &apos;email&apos;: &apos;kyle.kloberdanz@mongodb.com&apos;, &apos;username&apos;: &apos;kkloberdanz&apos;}
&lt;p&gt;Message: Server update caused a break in waterfall (#934)&lt;/p&gt;

&lt;p&gt;Recently, the server changed behavior where creating a collection that&lt;br/&gt;
already exists will not trigger an exception. Instead, replace this test&lt;br/&gt;
with a check that the collection was indeed created. See Jira ticket&lt;br/&gt;
below.&lt;/p&gt;

&lt;p&gt;Jira: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60064&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-60064&lt;/a&gt;&lt;br/&gt;
Branch: releases/v3.7&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-cxx-driver/commit/c2e6eb42c626620b43ea308db2e21e6888bfa94e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-cxx-driver/commit/c2e6eb42c626620b43ea308db2e21e6888bfa94e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5221502" author="xgen-internal-githook" created="Wed, 22 Feb 2023 16:09:10 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Kyle Kloberdanz&apos;, &apos;email&apos;: &apos;kyle.kloberdanz@mongodb.com&apos;, &apos;username&apos;: &apos;kkloberdanz&apos;}
&lt;p&gt;Message: Server update caused a break in waterfall (#934)&lt;/p&gt;

&lt;p&gt;Recently, the server changed behavior where creating a collection that&lt;br/&gt;
already exists will not trigger an exception. Instead, replace this test&lt;br/&gt;
with a check that the collection was indeed created. See Jira ticket&lt;br/&gt;
below.&lt;/p&gt;

&lt;p&gt;Jira: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60064&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-60064&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-cxx-driver/commit/c1de68ec55722b8c32bb95fa0baafa68e4b49042&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-cxx-driver/commit/c1de68ec55722b8c32bb95fa0baafa68e4b49042&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5204708" author="xgen-internal-githook" created="Thu, 16 Feb 2023 17:57:19 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Kaitlin Mahar&apos;, &apos;email&apos;: &apos;kaitlin.mahar@mongodb.com&apos;, &apos;username&apos;: &apos;kmahar&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60064&quot; title=&quot;Make create command idempotent on mongod&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60064&quot;&gt;&lt;del&gt;SERVER-60064&lt;/del&gt;&lt;/a&gt; Make create command idempotent on mongod&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ddf2bfb6a3e3b1a17723e77166690eb6f00ad36d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ddf2bfb6a3e3b1a17723e77166690eb6f00ad36d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4697535" author="tommaso.tocci" created="Fri, 22 Jul 2022 09:00:00 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=michael.gargiulo%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;michael.gargiulo@mongodb.com&quot;&gt;michael.gargiulo@mongodb.com&lt;/a&gt; we have a lot chain of tickets that are blocked on this one. Is there any chance we can speed this up?&lt;/p&gt;</comment>
                            <comment id="4574588" author="JIRAUSER1263826" created="Thu, 26 May 2022 10:37:31 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=michael.gargiulo%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;michael.gargiulo@mongodb.com&quot;&gt;michael.gargiulo@mongodb.com&lt;/a&gt; Do you have any updates on this ticket?&lt;/p&gt;</comment>
                            <comment id="4292731" author="kaloian.manassiev" created="Fri, 14 Jan 2022 11:06:57 +0000"  >&lt;p&gt;I agree with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=antonio.fuschetto&quot; class=&quot;user-hover&quot; rel=&quot;antonio.fuschetto&quot;&gt;antonio.fuschetto&lt;/a&gt;&apos;s reasoning that we should make the create&apos;s behaviour in standalone/replicaset match that of sharding and not fail if the collection already exists (with the same options).&lt;/p&gt;

&lt;p&gt;Since the change is on the standalone/replicaset side, I am moving this ticket to the Storage Execution&apos;s backlog.&lt;/p&gt;</comment>
                            <comment id="4288342" author="JIRAUSER1259062" created="Wed, 12 Jan 2022 15:20:43 +0000"  >&lt;p&gt;I conducted some experiments to figure out what the current situation is, using different product versions and deployments. You can see the detailed results in the attached &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/354593/354593_SERVER-60064+Standalone.txt&quot; title=&quot;SERVER-60064 Standalone.txt attached to SERVER-60064&quot;&gt;SERVER-60064 Standalone.txt&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt; and &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/354594/354594_SERVER-60064+Sharded.txt&quot; title=&quot;SERVER-60064 Sharded.txt attached to SERVER-60064&quot;&gt;SERVER-60064 Sharded.txt&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;&#160;files, but the current behavior can be summarized as follows:&lt;/p&gt;
&lt;div class=&apos;table-wrap&apos;&gt;
&lt;table class=&apos;confluenceTable&apos;&gt;&lt;tbody&gt;
&lt;tr&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Use cases&lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Standalone / Replica set&lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Sharded cluster&lt;/th&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Recreation of a collection that already existing&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;{ &quot;ok&quot; : 0, &quot;errmsg&quot; : &quot;Collection already exists. NS: mydb.coll1&quot;, ... }&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;{ &quot;ok&quot; : 1, ... }&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Recreation of an index that already existing&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;{ &quot;ok&quot; : 1, &quot;note&quot; : &quot;all indexes already exist&quot;, ... }&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;{ &quot;ok&quot; : 1, &quot;raw.note&quot; : &quot;all indexes already exist&quot;, ... }&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;&lt;/table&gt;
&lt;/div&gt;


&lt;p&gt;Additional notes:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;The behavior of the command does not change whether the existing collection is empty or not.&lt;/li&gt;
	&lt;li&gt;The command fails (as expected) if the existing collection has been created with different options (i.e. {&quot;ok&quot; : 0, &quot;errmsg&quot; : &quot;ns: db1.coll1 already exists with different options: {}&quot;, &#8230;}).&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;From my point of view, every command should be idempotent, meaning that it can be run several times without changing the final result, both in terms of changed data and results for the caller.&lt;/p&gt;

&lt;p&gt;If the user has proper permissions, the parameters are syntactically and semantically correct, etc., the command should succeed even if the data is already as requested. This implies that the command should return &#8220;ok: 0&#8221; and, if really necessary, include a &quot;note&quot; field like &quot;Collection already exists&quot; (as today happens for the recreation of existing indexes).&lt;/p&gt;

&lt;p&gt;That is, the behavior of the MongoS (starting with version 4.0) seems reasonable to me as in line with what I said above. I believe, instead, that we should change the behavior of MongoD, so that the users experience the same in case of standalone and replica set deployments.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Technical note&lt;/b&gt;: Idempotence is particularly relevant in distributed systems, since calling a certain API, the service may fail, or worse it may time out and not even send an error response. In these cases, if the service is idempotent, the client (user application or driver) can simply call it back any number of times without the fear that calling it multiple times will have negative effects.&lt;/p&gt;</comment>
                            <comment id="4160238" author="pavithra.vetriselvan" created="Mon, 1 Nov 2021 13:48:31 +0000"  >&lt;p&gt;Got it, then I&apos;m going to assign this back to the Sharding Team since we don&apos;t want to change the default behavior in mongod. &lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=max.hirschhorn&quot; class=&quot;user-hover&quot; rel=&quot;max.hirschhorn&quot;&gt;max.hirschhorn&lt;/a&gt; Do you have any opinions on existing collection errors being guarded by a flag?&lt;/p&gt;</comment>
                            <comment id="4158000" author="shane.harvey" created="Fri, 29 Oct 2021 18:50:00 +0000"  >&lt;blockquote&gt;&lt;p&gt;If the collection is non-empty, does the create command still succeed for sharded clusters?&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;Yes. I agree that returning an error makes the most sense. The drivers team was confused when the sharded behavior changed back in 4.0 (see the discussion in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33276&quot; title=&quot;Creation of already existing collection on a sharded cluster should be an error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33276&quot;&gt;&lt;del&gt;SERVER-33276&lt;/del&gt;&lt;/a&gt;).&lt;/p&gt;</comment>
                            <comment id="4156998" author="pavithra.vetriselvan" created="Fri, 29 Oct 2021 13:12:48 +0000"  >&lt;p&gt;Execution believes that it is correct for mongod to return an error if the collection already exists. &lt;/p&gt;

&lt;p&gt;If the collection is non-empty, does the create command still succeed for sharded clusters? That seems a little confusing to me, since I would expect the collection to be empty upon an explicit create command (vs implicit creation with an insert or something).&lt;/p&gt;

&lt;p&gt;The flag doesn&apos;t seem like a bad option if it means that Drivers can opt into consistent behavior across sharded and unsharded clusters.&lt;/p&gt;

</comment>
                            <comment id="4146381" author="shane.harvey" created="Mon, 25 Oct 2021 19:29:51 +0000"  >&lt;p&gt;The ask is to make the behavior consistent between mongod and mongos. In 3.6 and earlier, I believe mongos and mongod both returned an error on existing collections. Starting in 4.0 (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33276&quot; title=&quot;Creation of already existing collection on a sharded cluster should be an error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33276&quot;&gt;&lt;del&gt;SERVER-33276&lt;/del&gt;&lt;/a&gt;) mongos was changed to not return an error.&lt;/p&gt;</comment>
                            <comment id="4142130" author="pavithra.vetriselvan" created="Fri, 22 Oct 2021 14:54:39 +0000"  >&lt;p&gt;Is the ask here to make mongod not error if there is an existing collection with the same options? It feels like someone from Product should weigh in on this decision since I imagine it&apos;d be a significant backwards breaking change. CC: &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=michael.gargiulo&quot; class=&quot;user-hover&quot; rel=&quot;michael.gargiulo&quot;&gt;michael.gargiulo&lt;/a&gt; Not sure if you have context here or know someone else who does?&lt;/p&gt;

&lt;p&gt;Also, the &lt;tt&gt;create&lt;/tt&gt; command is a part of API Version 1. Wouldn&apos;t we need to break API to introduce a different command response in either case (i.e. changing the mongos response vs changing the mongod response)? Even if we guarded this change with a flag like &lt;tt&gt;allowExisting&lt;/tt&gt;, that flag would have to be unstable and can&apos;t be used with &lt;tt&gt;apiStrict: true&lt;/tt&gt;.&lt;/p&gt;</comment>
                            <comment id="4112838" author="max.hirschhorn@10gen.com" created="Fri, 8 Oct 2021 14:15:19 +0000"  >&lt;p&gt;The Sharding NYC believes it is useful for mongos to not return an error. Sending this over to the Storage Execution team to see if we&apos;d want to change the mongod behavior instead.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10420">
                    <name>Backports</name>
                                            <outwardlinks description="backported by">
                                                        </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                                        </outwardlinks>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="2263600">SERVER-73967</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="885389">PYTHON-1936</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2266720">COMPASS-6526</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="2266718">DOCS-15906</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="1906790">SERVER-60933</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10520">
                    <name>Problem/Incident</name>
                                            <outwardlinks description="causes">
                                        <issuelink>
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