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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-31466] CollectionCloner fails when a collection is dropped and re-created between getMores</title>
                <link>https://jira.mongodb.org/browse/SERVER-31466</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If a collection is dropped then immediately re-created on the primary while another node is doing an initial sync of that collection, the initial sync will fail with a CursorNotFoundError&lt;/p&gt;

&lt;p&gt;This is because when a collection is dropped, we delete the cursors completely, so we don&apos;t know why the cursor was killed.&lt;/p&gt;

&lt;p&gt;Possible fixes: &lt;/p&gt;

&lt;p&gt;Include uuid of collection in cursor objects; check existence of uuid (instead of or in addition to namespace) to return a CollectionDropped error.&lt;/p&gt;

&lt;p&gt;Keep killed cursors around for some length of time (or until the cursor is used), marked to say they were killed because the collection was dropped.&lt;/p&gt;</description>
                <environment></environment>
        <key id="442712">SERVER-31466</key>
            <summary>CollectionCloner fails when a collection is dropped and re-created between getMores</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
                            <label>initialSync</label>
                    </labels>
                <created>Mon, 9 Oct 2017 18:23:17 +0000</created>
                <updated>Fri, 27 Oct 2023 20:43:51 +0000</updated>
                            <resolved>Thu, 9 Apr 2020 19:40:12 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3033958" author="siyuan.zhou@10gen.com" created="Thu, 9 Apr 2020 19:40:04 +0000"  >&lt;p&gt;Great. Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthew.russotto&quot; class=&quot;user-hover&quot; rel=&quot;matthew.russotto&quot;&gt;matthew.russotto&lt;/a&gt;! Closing this ticket as Gone Away.&lt;/p&gt;</comment>
                            <comment id="3033715" author="matthew.russotto" created="Thu, 9 Apr 2020 17:31:00 +0000"  >&lt;p&gt;This should be fixed in 4.4 by the cloner rewrite; we&apos;ll try to resume the collection scan if the cursor goes away, and we do the resume by UUID.  Also the UUID of the collection is now included in cursor objects.&lt;/p&gt;</comment>
                            <comment id="3032356" author="siyuan.zhou@10gen.com" created="Thu, 9 Apr 2020 05:30:08 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthew.russotto&quot; class=&quot;user-hover&quot; rel=&quot;matthew.russotto&quot;&gt;matthew.russotto&lt;/a&gt;, do you think this is solved by rewriting the cloner. If the sync source behavior is still the same, I feel this might still be a problem. However, since it&apos;s rare and not a trivial fix. I&apos;d propose &quot;Won&apos;t Fix&quot; if you agree.&lt;/p&gt;</comment>
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