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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-37408] Add afterClusterTime to initial sync collection scans</title>
                <link>https://jira.mongodb.org/browse/SERVER-37408</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="612237">SERVER-37408</key>
            <summary>Add afterClusterTime to initial sync collection scans</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="matthew.russotto@mongodb.com">Matthew Russotto</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 1 Oct 2018 15:02:34 +0000</created>
                <updated>Sun, 29 Oct 2023 22:27:45 +0000</updated>
                            <resolved>Tue, 6 Nov 2018 20:34:29 +0000</resolved>
                                                    <fixVersion>3.6.10</fixVersion>
                    <fixVersion>4.0.5</fixVersion>
                    <fixVersion>4.1.5</fixVersion>
                                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="2074781" author="xgen-internal-githook" created="Wed, 28 Nov 2018 23:54:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37408&quot; title=&quot;Add afterClusterTime to initial sync collection scans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37408&quot;&gt;&lt;del&gt;SERVER-37408&lt;/del&gt;&lt;/a&gt; Add afterClusterTime to initial sync collection scans&lt;/p&gt;

&lt;p&gt;(cherry picked from commit cbd0a1a3df662c54da23d5def4ccc10dd1c1f88e)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/96c21fca9277366ace909a53ae67bba26f1abac2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/96c21fca9277366ace909a53ae67bba26f1abac2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2074780" author="xgen-internal-githook" created="Wed, 28 Nov 2018 23:53:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37408&quot; title=&quot;Add afterClusterTime to initial sync collection scans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37408&quot;&gt;&lt;del&gt;SERVER-37408&lt;/del&gt;&lt;/a&gt; Add afterClusterTime to initial sync collection scans&lt;/p&gt;

&lt;p&gt;(cherry picked from commit cbd0a1a3df662c54da23d5def4ccc10dd1c1f88e)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2fd83edf0919e45cbb8c4dbe9fd84d0284877b58&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2fd83edf0919e45cbb8c4dbe9fd84d0284877b58&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2074687" author="matthew.russotto" created="Wed, 28 Nov 2018 22:16:43 +0000"  >&lt;p&gt;This bug has a much smaller window to manifest on 3.6 and 3.4 because the S-lock removed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34243&quot; title=&quot;listCollections should not require a MODE_S database lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34243&quot;&gt;&lt;del&gt;SERVER-34243&lt;/del&gt;&lt;/a&gt; still exists in those revisions.&lt;/p&gt;</comment>
                            <comment id="2053715" author="xgen-internal-githook" created="Tue, 6 Nov 2018 20:25:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37408&quot; title=&quot;Add afterClusterTime to initial sync collection scans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37408&quot;&gt;&lt;del&gt;SERVER-37408&lt;/del&gt;&lt;/a&gt; Add afterClusterTime to initial sync collection scans&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cbd0a1a3df662c54da23d5def4ccc10dd1c1f88e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cbd0a1a3df662c54da23d5def4ccc10dd1c1f88e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2045631" author="milkie" created="Mon, 29 Oct 2018 22:11:23 +0000"  >&lt;p&gt;Correct.  OplogFetcher::_makeFindCommandObject() already uses afterOpTime instead of afterClusterTime in 3.6 and 3.4.&lt;/p&gt;</comment>
                            <comment id="2045547" author="matthew.russotto" created="Mon, 29 Oct 2018 21:03:21 +0000"  >&lt;p&gt;I think for 3.4 and 3.6 (for upgrade/downgrade) we&apos;ll need to use afterOpTime instead of afterClusterTime.&lt;/p&gt;</comment>
                            <comment id="2025555" author="judah.schvimer" created="Fri, 5 Oct 2018 20:39:33 +0000"  >&lt;p&gt;The bug here is that without using &lt;tt&gt;afterClusterTime&lt;/tt&gt;, the initial oplog read for the &quot;start timestamp&quot; could return timestamp 7, even if the storage transaction for the operation and oplog entry at timestamp 6 is not yet storage-committed. If at timestamp 6, document &apos;a&apos; is removed, the collection clone currently could clone &apos;a&apos;, but never fetch the oplog entry at timestamp 6 and thus never remove it. Adding &lt;tt&gt;afterClusterTime&lt;/tt&gt; guarantees we&apos;ll have all oplog entries for data we clone.&lt;/p&gt;</comment>
                            <comment id="2019203" author="judah.schvimer" created="Mon, 1 Oct 2018 15:30:46 +0000"  >&lt;p&gt;This should be reproducible using a test similar to &lt;a href=&quot;https://github.com/mongodb/mongo/commit/b64de307169891f859c29f207e712ed0eb3cd2a2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b64de307169891f859c29f207e712ed0eb3cd2a2&lt;/a&gt; and the &lt;tt&gt;hangAfterCollectionInserts&lt;/tt&gt; failpoint: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/434f7c8c8e66529fbd47f8f6be21df600701385b/jstests/core/txns/speculative_snapshot_includes_all_writes.js#L45-L49&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/434f7c8c8e66529fbd47f8f6be21df600701385b/jstests/core/txns/speculative_snapshot_includes_all_writes.js#L45-L49&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="417684">SERVER-30724</issuekey>
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            <issuekey id="422951">SERVER-30927</issuekey>
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