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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-23919] Database/Collection drop during initial sync can cause collmod to fail initial sync</title>
                <link>https://jira.mongodb.org/browse/SERVER-23919</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If during the cloning of collections the database is dropped then it is possible that none of the collections are copied &amp;#8211; same can happen with a collection as well. If we then apply an operation from the oplog which tries to change that collection, like collMod, it is possible for it fail and error (causing a shutdown of the server).&lt;/p&gt;

&lt;p&gt;We should write a test to reproduce this before we attempt a fix, to ensure it is a real problem.&lt;/p&gt;

&lt;p&gt;One possible solution might be that we check if the collection still exists remotely and if not, ignore the error &amp;#8211; since the database will be dropped later in the oplog.&lt;/p&gt;</description>
                <environment></environment>
        <key id="282297">SERVER-23919</key>
            <summary>Database/Collection drop during initial sync can cause collmod to fail initial sync</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="9">Done</resolution>
                                        <assignee username="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                            <label>code-only</label>
                    </labels>
                <created>Mon, 25 Apr 2016 20:41:23 +0000</created>
                <updated>Thu, 18 May 2017 17:16:04 +0000</updated>
                            <resolved>Mon, 2 May 2016 15:01:28 +0000</resolved>
                                                    <fixVersion>3.0.13</fixVersion>
                    <fixVersion>3.2.7</fixVersion>
                    <fixVersion>3.3.6</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1269215" author="xgen-internal-githook" created="Thu, 19 May 2016 18:31:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23919&quot; title=&quot;Database/Collection drop during initial sync can cause collmod to fail initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23919&quot;&gt;&lt;del&gt;SERVER-23919&lt;/del&gt;&lt;/a&gt; fix call to userCreateNS&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/60109c530d7df9b7ad2e41bdec917fbf8f9ea74e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/60109c530d7df9b7ad2e41bdec917fbf8f9ea74e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1268912" author="xgen-internal-githook" created="Thu, 19 May 2016 15:27:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23919&quot; title=&quot;Database/Collection drop during initial sync can cause collmod to fail initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23919&quot;&gt;&lt;del&gt;SERVER-23919&lt;/del&gt;&lt;/a&gt; gather all collection names at the start of initial sync&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2ce439622ee3930b395e97ced681cbc9685c4147&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2ce439622ee3930b395e97ced681cbc9685c4147&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1253772" author="milkie" created="Tue, 3 May 2016 17:22:41 +0000"  >&lt;p&gt;This is fixed for collmod&apos;s that modify the collection.  For collmod that modifies an index on the collection (the flag called &quot;index&quot;), there is a still a problem.  See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20677&quot; title=&quot;Failed collMod during replication results in fassert shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20677&quot;&gt;&lt;del&gt;SERVER-20677&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1252453" author="xgen-internal-githook" created="Mon, 2 May 2016 19:08:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23919&quot; title=&quot;Database/Collection drop during initial sync can cause collmod to fail initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23919&quot;&gt;&lt;del&gt;SERVER-23919&lt;/del&gt;&lt;/a&gt; gather all collection names at the start of initial sync&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c52c530428fbbe0cae1293ad6605c3ab7be2a281)&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fdbaa6d5be2c3aca8d69b6a4ae1830a0b439bc2f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fdbaa6d5be2c3aca8d69b6a4ae1830a0b439bc2f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1251936" author="xgen-internal-githook" created="Mon, 2 May 2016 15:01:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23919&quot; title=&quot;Database/Collection drop during initial sync can cause collmod to fail initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23919&quot;&gt;&lt;del&gt;SERVER-23919&lt;/del&gt;&lt;/a&gt; gather all collection names at the start of initial sync&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c52c530428fbbe0cae1293ad6605c3ab7be2a281&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c52c530428fbbe0cae1293ad6605c3ab7be2a281&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1246777" author="milkie" created="Tue, 26 Apr 2016 15:12:24 +0000"  >&lt;p&gt;I think if we gather and create all collections in all db&apos;s at the start of cloning, that should close the race to something small.  If we still lose the race, the initial sync will simply restart when it gets to the collMod op.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="359568">SERVER-28151</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="231879">SERVER-20677</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="282495">SERVER-23932</issuekey>
        </issuelink>
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