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    <title>MongoDB Jira</title>
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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-30403] NotAllowedOnShardedCollectionCmd should be versioned</title>
                <link>https://jira.mongodb.org/browse/SERVER-30403</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Despite intending to prevent commands that extend it from running on sharded collections, NotAllowedOnShardedCollectionCmd can run concurrently (i.e. race) with shardCollection.&lt;/p&gt;

&lt;p&gt;To counter this, it should take the same (dist)lock as shardCollection.&lt;/p&gt;

&lt;p&gt;Particularly, this will prevent convertToCapped (which, notably, changes the collection&apos;s UUID because it uses cloneCollectionAsCapped (which creates a cloned collection with a different UUID) + renameCollection under the hood) and group from running on sharded collections.&lt;/p&gt;</description>
                <environment></environment>
        <key id="409610">SERVER-30403</key>
            <summary>NotAllowedOnShardedCollectionCmd should be versioned</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="hugh.han">Hugh Han</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Fri, 28 Jul 2017 14:32:51 +0000</created>
                <updated>Mon, 30 Oct 2023 23:14:48 +0000</updated>
                            <resolved>Wed, 23 Aug 2017 15:21:44 +0000</resolved>
                                    <version>3.5.10</version>
                                    <fixVersion>3.5.13</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1655968" author="ramon.fernandez" created="Thu, 24 Aug 2017 13:44:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: u&apos;hughhan1&apos;, &apos;name&apos;: u&apos;Hugh Han&apos;, &apos;email&apos;: u&apos;hughhan1@gmail.com&apos;}
&lt;p&gt;Message:&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30403&quot; title=&quot;NotAllowedOnShardedCollectionCmd should be versioned&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30403&quot;&gt;&lt;del&gt;SERVER-30403&lt;/del&gt;&lt;/a&gt; NotAllowedOnShardedCollectionCmd should be versioned&lt;br/&gt;
Branch:master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0890aff3e8ed432fc08a2e5d6569b07976668463&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0890aff3e8ed432fc08a2e5d6569b07976668463&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1650047" author="hugh.han" created="Wed, 16 Aug 2017 22:22:54 +0000"  >&lt;p&gt;Commenting as a note that we should solve this by making requests forwarded by NotAllowedOnShardedCollectionCmd versioned, as opposed to having it take a distributed lock.&lt;/p&gt;

&lt;p&gt;A distributed lock would in fact not work if we were to have two mongos nodes, the first of which successfully shards a collection, and the second of which tries to run a NotAllowedOnShardedCollectionCmd &lt;b&gt;after&lt;/b&gt; the collection becomes sharded but &lt;b&gt;before&lt;/b&gt; it realizes that the collection is sharded. Because mongos currently checks whether a collection is sharded by looking at its ChunkManager, the second mongos could still send NotAllowedOnShardedCollectionCmd to sharded collections.&lt;/p&gt;

&lt;p&gt;Hence, we should attach ChunkVersion::UNSHARDED().&lt;/p&gt;</comment>
                            <comment id="1648087" author="esha.maharishi@10gen.com" created="Mon, 14 Aug 2017 21:13:01 +0000"  >&lt;p&gt;Another way to do this might just be to make the requests forwarded by NotAllowedOnShardedCollectionCmd versioned (i.e., attach ChunkVersion::UNSHARDED()).&lt;/p&gt;</comment>
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