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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>[SERVER-46249] Disallow createIndexes and createCollection from running inside transactions that explicitly specify non-local readConcern</title>
                <link>https://jira.mongodb.org/browse/SERVER-46249</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The test concurrent_drops_and_creates.js can be modified to create a scenario where createIndexes and createCollection can fail with the following message:&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;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-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;&quot;Command create does not support { readConcern: { level: \&quot;snapshot\&quot;, provenance: \&quot;clientSupplied\&quot; } } :: caused by :: read concern not supported&quot;,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;This failure occurs if concurrent_drops_and_creates.js explicitly creates a collection or an index inside &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b77010cab2386a58e05b6ffaa04921c43578467c/jstests/core/txns/concurrent_drops_and_creates.js#L46-L48&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this transaction&lt;/a&gt; (instead of the highlighted lines), and is run inside &lt;tt&gt;sharded_jscore_txns&lt;/tt&gt;. &lt;/p&gt;

&lt;p&gt;I spun up a &lt;tt&gt;ShardingTest&lt;/tt&gt; locally and attempted the same sequence of events as this test, but I did not run into the error, which leads me to believe something about the testing configuration results in readConcern getting explicitly forwarded to the cluster create and cluster createIndexes commands. &lt;/p&gt;

&lt;p&gt;Note that this error does not occur when running the same test (with the above modification) in replica_sets_jscore_passthrough.&lt;/p&gt;

&lt;p&gt;As an update, it looks like in order to reproduce this error, createCollection/createIndexes needs to be run &lt;b&gt;after&lt;/b&gt; another operation inside a transaction. If either is the &lt;b&gt;first&lt;/b&gt; operation inside the transaction, the error does not occur.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1161848">SERVER-46249</key>
            <summary>Disallow createIndexes and createCollection from running inside transactions that explicitly specify non-local readConcern</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="maria.vankeulen@mongodb.com">Maria van Keulen</assignee>
                                    <reporter username="maria.vankeulen@mongodb.com">Maria van Keulen</reporter>
                        <labels>
                    </labels>
                <created>Wed, 19 Feb 2020 15:29:47 +0000</created>
                <updated>Sun, 29 Oct 2023 22:12:02 +0000</updated>
                            <resolved>Mon, 30 Mar 2020 14:45:26 +0000</resolved>
                                                    <fixVersion>4.4.0-rc0</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="3019749" author="xgen-internal-githook" created="Tue, 31 Mar 2020 18:29:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Maria van Keulen&apos;, &apos;email&apos;: &apos;maria@mongodb.com&apos;, &apos;username&apos;: &apos;mvankeulen94&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46249&quot; title=&quot;Disallow createIndexes and createCollection from running inside transactions that explicitly specify non-local readConcern&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46249&quot;&gt;&lt;del&gt;SERVER-46249&lt;/del&gt;&lt;/a&gt; Check individual txn statements for readConcern support&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 75f04844c16c161ff963acfa91112009de455a9b)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cd032301013093c56f2525a1153b87d3d44e084d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cd032301013093c56f2525a1153b87d3d44e084d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3012758" author="xgen-internal-githook" created="Mon, 30 Mar 2020 14:06:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Maria van Keulen&apos;, &apos;email&apos;: &apos;maria@mongodb.com&apos;, &apos;username&apos;: &apos;mvankeulen94&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46249&quot; title=&quot;Disallow createIndexes and createCollection from running inside transactions that explicitly specify non-local readConcern&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46249&quot;&gt;&lt;del&gt;SERVER-46249&lt;/del&gt;&lt;/a&gt; Check individual txn statements for readConcern support&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/75f04844c16c161ff963acfa91112009de455a9b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/75f04844c16c161ff963acfa91112009de455a9b&lt;/a&gt;&lt;/p&gt;</comment>
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