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    <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-82028] DDL operations on timeseries collection during tenant migration can crash the recipient due to an invariant failure.</title>
                <link>https://jira.mongodb.org/browse/SERVER-82028</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When the timeseries collection doesn&apos;t start with the expected &apos;system.buckets&apos; prefix, we &lt;a href=&quot;https://github.com/10gen/mongo/blob/be38579dc72a40988cada1f43ab6695dcff8cc36/src/mongo/db/namespace_string.cpp#L401&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;invariant&lt;/a&gt;. During the replay of  createCollection oplog entry on an inconsistent data (i.e, oplog application mode &lt;tt&gt;kInitialSync&lt;/tt&gt;), if a collection already exits with the same name, we temporarily rename it to &lt;a href=&quot;https://github.com/10gen/mongo/blob/be38579dc72a40988cada1f43ab6695dcff8cc36/src/mongo/db/catalog/create_collection.cpp#L890-L949&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;temp name&lt;/a&gt; (starting with &quot;tempXXX.create&quot;) before creating the new collection.  So, a timerseries collection &lt;tt&gt;db.system.bucket.coll&lt;/tt&gt; can get temporarily renamed to non-timeseries temp collection &lt;tt&gt;db.tempXXX.create&lt;/tt&gt;. If a user runs the &apos;listCollection&apos; command before the oplog could finish catching up to make the data consistent, they may observe that the &lt;a href=&quot;https://github.com/10gen/mongo/blob/be38579dc72a40988cada1f43ab6695dcff8cc36/src/mongo/db/commands/list_collections.cpp#L445&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;timeseries collection&lt;/a&gt; starts with &apos;tempXXX&apos; rather than &apos;system.buckets,&apos; potentially triggering an invariant failure.&lt;/p&gt;

&lt;p&gt;Though both tenant migration and logical initial sync behaves similarly, considering the fact that we don&apos;t allow external user commands when node is in initial sync, this issue only impacts tenant migration where the cloud can run `listCollections` on the recipient primary to get the list of collections to drop on recipient before retrying the migration, following the initial migration attempt failed after partially migrating donor data.&lt;/p&gt;

&lt;p&gt;Since this a bug can cause server crash in Serverless,  this will affect other tenants located in the recipient.  To be noted, The tenant migration will be retired in 7.2, so this is an issue only when with 7.1 and below.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2470369">SERVER-82028</key>
            <summary>DDL operations on timeseries collection during tenant migration can crash the recipient due to an invariant failure.</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="wei.hu@mongodb.com">Wei Hu</assignee>
                                    <reporter username="suganthi.mani@mongodb.com">Suganthi Mani</reporter>
                        <labels>
                    </labels>
                <created>Tue, 10 Oct 2023 06:30:34 +0000</created>
                <updated>Wed, 8 Nov 2023 01:04:16 +0000</updated>
                            <resolved>Tue, 7 Nov 2023 04:07:48 +0000</resolved>
                                                    <fixVersion>7.1.1</fixVersion>
                    <fixVersion>7.2.0-rc0</fixVersion>
                    <fixVersion>7.0.4</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5862749" author="xgen-internal-githook" created="Wed, 8 Nov 2023 00:47:14 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Wei Hu&apos;, &apos;email&apos;: &apos;wei.hu@mongodb.com&apos;, &apos;username&apos;: &apos;wh5a&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-82028&quot; title=&quot;DDL operations on timeseries collection during tenant migration can crash the recipient due to an invariant failure.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-82028&quot;&gt;&lt;del&gt;SERVER-82028&lt;/del&gt;&lt;/a&gt; When renaming a time series collection, the temp name should start with system.buckets prefix&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/04fd16d7a4adf5a795e69832c17fa1bb5c8bf9fd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/04fd16d7a4adf5a795e69832c17fa1bb5c8bf9fd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5860995" author="xgen-internal-githook" created="Tue, 7 Nov 2023 16:16:29 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Wei Hu&apos;, &apos;email&apos;: &apos;wei.hu@mongodb.com&apos;, &apos;username&apos;: &apos;wh5a&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-82028&quot; title=&quot;DDL operations on timeseries collection during tenant migration can crash the recipient due to an invariant failure.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-82028&quot;&gt;&lt;del&gt;SERVER-82028&lt;/del&gt;&lt;/a&gt; When renaming a time series collection, the temp name should start with system.buckets prefix&lt;br/&gt;
Branch: v7.1&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9fe1ad3febe7ed0eb38fb5d7406bec02deb37496&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9fe1ad3febe7ed0eb38fb5d7406bec02deb37496&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5859502" author="xgen-internal-githook" created="Tue, 7 Nov 2023 03:55:48 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Wei Hu&apos;, &apos;email&apos;: &apos;wei.hu@mongodb.com&apos;, &apos;username&apos;: &apos;wh5a&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-82028&quot; title=&quot;DDL operations on timeseries collection during tenant migration can crash the recipient due to an invariant failure.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-82028&quot;&gt;&lt;del&gt;SERVER-82028&lt;/del&gt;&lt;/a&gt; When renaming a time series collection, the temp name should start with system.buckets prefix&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/db361ce7749ee478f501cf8814d8c5f58100ff1c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/db361ce7749ee478f501cf8814d8c5f58100ff1c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5802304" author="suganthi.mani" created="Tue, 24 Oct 2023 15:10:59 +0000"  >&lt;p&gt;We decided to go with this option &quot;createCollection code path renames to temp collection, such that it follows the timeseries namespace rules.&quot;&lt;/p&gt;</comment>
                            <comment id="5767864" author="suganthi.mani" created="Tue, 10 Oct 2023 15:03:34 +0000"  >&lt;p&gt;Fix options: This can be either fixed by  making the listCollection not to list temp collections or createCollection code path renames to temp collection, such that it follows the timeseries namespace rules. If we go with the first option, then we need &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-82039&quot; title=&quot;Renaming a non-temp collection to temp collection does not set the collection option &amp;#39;temp` as true.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-82039&quot;&gt;&lt;del&gt;SERVER-82039&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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