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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-80301] View/Timeseries recreated on a dropped regular collection  namespace can cause tenant migration/logical initial sync to fail with &apos;commandNotSupportedOnView&apos;</title>
                <link>https://jira.mongodb.org/browse/SERVER-80301</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Any data migration protocol that applies oplog entries on inconsistent snapshot (i.e, not a stable recovery), then the following sequence could cause the  data migration to fail with error &lt;tt&gt;ErrorCodes::commandNotSupportedOnView&lt;/tt&gt; - &lt;tt&gt;Namespace &amp;lt;xxxx&amp;gt; is a view, not a collection&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;1) Sync source: Create a regular collection  on nss &lt;tt&gt;db.coll&lt;/tt&gt; at TS(100).&lt;br/&gt;
2) SyncTarget:  Starts the logical cloning with beginApplyingTimestamp as TS(110).&lt;br/&gt;
3) Sync source: Inserts an entry into collection &lt;tt&gt;db.foo&lt;/tt&gt; at TS(120).&lt;br/&gt;
4) Sync source: Drop collection &lt;tt&gt;db.foo&lt;/tt&gt; at TS(130).&lt;br/&gt;
5) Sync Source: creates a view on dropped collection nss &lt;tt&gt;db.coll&lt;/tt&gt; at TS(140).&lt;br/&gt;
6) SyncTarget:  Database Cloner clones database &apos;db&apos;. And, that results in copying &lt;tt&gt;db.system.views collection&lt;/tt&gt; which would register the view on nss &lt;tt&gt;db.coll&lt;/tt&gt;.&lt;br/&gt;
7) SyncTarget: Finishes cloning and starts applying the oplog entries from TS(110) to TS(140) to make the data consistent.&lt;br/&gt;
8) SyncTarget: Now, on trying to apply TS(120), the oplog applier will fail with  CommandNotSupportedOnView.&lt;/p&gt;

&lt;p&gt;To fix this issue, we should just ignore &lt;tt&gt;CommandNotSupportedOnView&lt;/tt&gt; error  for &lt;a href=&quot;https://github.com/10gen/mongo/blob/eeac78cd8de74ca1cffb18eb4b798b8392df6192/src/mongo/db/repl/oplog.h#L202&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;oplog application mode &lt;/a&gt;&lt;tt&gt;kInitialSync&lt;/tt&gt; and for &lt;tt&gt;kUnstableRecovering&lt;/tt&gt;. To be noted, both logical initial sync and tenant migration uses oplog application mode kInitialSync . &lt;/p&gt;

&lt;p&gt;Note: I have attached a  tenant migration repro for this bug.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2423153">SERVER-80301</key>
            <summary>View/Timeseries recreated on a dropped regular collection  namespace can cause tenant migration/logical initial sync to fail with &apos;commandNotSupportedOnView&apos;</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="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="suganthi.mani@mongodb.com">Suganthi Mani</reporter>
                        <labels>
                    </labels>
                <created>Tue, 22 Aug 2023 13:30:06 +0000</created>
                <updated>Sun, 29 Oct 2023 21:17:15 +0000</updated>
                            <resolved>Thu, 24 Aug 2023 19:15:11 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="5657470" author="xgen-internal-githook" created="Thu, 24 Aug 2023 19:11:39 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80301&quot; title=&quot;View/Timeseries recreated on a dropped regular collection  namespace can cause tenant migration/logical initial sync to fail with &amp;#39;commandNotSupportedOnView&amp;#39;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80301&quot;&gt;&lt;del&gt;SERVER-80301&lt;/del&gt;&lt;/a&gt; Ignore CommandNotSupportedOnView error for oplog application modes kInitialSync and kUnstableRecovering&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/708bd70c8f7000ea325845286f4b97fb8227d45c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/708bd70c8f7000ea325845286f4b97fb8227d45c&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="2404242">SERVER-79482</issuekey>
        </issuelink>
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                    <name>Related</name>
                                                                <inwardlinks description="is related to">
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            <issuekey id="1974026">SERVER-63129</issuekey>
        </issuelink>
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