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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-66089] Initial sync should do transaction table read with a later afterClusterTime</title>
                <link>https://jira.mongodb.org/browse/SERVER-66089</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;To find the beginFetching and beginApplying timestamps in logical initial sync, we do a three-step process&lt;/p&gt;

&lt;p&gt;1) Read the last optime on the sync source.&lt;/p&gt;

&lt;p&gt;2) Read the transaction table on the sync source&lt;/p&gt;

&lt;p&gt;3) Read the last optime on the sync source again.&lt;/p&gt;

&lt;p&gt;beginApplying is the result of the third step.  beginFetching is either the result of the first step or a time in the transaction table.  We must read the transaction table strictly after that everything before that last optime in the first step.  On a primary sync source, that just means the no-holes point, which we achieve by using an afterClusterTime of (0,1).  On a secondary sync source, after &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58636&quot; title=&quot;Initial syncing node can miss final oplog entry when calculating stopTimestamp against a secondary sync source&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58636&quot;&gt;&lt;del&gt;SERVER-58636&lt;/del&gt;&lt;/a&gt;, that means the lastAppliedSnapshot must reach that point.  We can achieve that by instead using an afterClusterTime that is the result of 1).&lt;/p&gt;

&lt;p&gt;Additionally, we need to make sure everything after 3) is read after the lastApplied reaches the beginApplyingTimestamp.  Fortunately we already do this by using an afterClusterTime of the beginApplyingTimestamp in the next query (for FCV)&lt;/p&gt;</description>
                <environment></environment>
        <key id="2036593">SERVER-66089</key>
            <summary>Initial sync should do transaction table read with a later afterClusterTime</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="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
                    </labels>
                <created>Fri, 29 Apr 2022 18:40:30 +0000</created>
                <updated>Sun, 29 Oct 2023 21:38:46 +0000</updated>
                            <resolved>Mon, 9 May 2022 22:02:54 +0000</resolved>
                                                    <fixVersion>5.0.9</fixVersion>
                    <fixVersion>4.4.15</fixVersion>
                    <fixVersion>6.0.0-rc6</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4551425" author="xgen-internal-githook" created="Mon, 16 May 2022 21:03:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@mongodb.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66089&quot; title=&quot;Initial sync should do transaction table read with a later afterClusterTime&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66089&quot;&gt;&lt;del&gt;SERVER-66089&lt;/del&gt;&lt;/a&gt; Initial sync should do transaction table read with a later afterClusterTime.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 878b6bb32413dc105133ffac31e9a0cf21e930f4)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a672707bcbde034c24ab426f481714b3d5b8bfc6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a672707bcbde034c24ab426f481714b3d5b8bfc6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4550381" author="xgen-internal-githook" created="Mon, 16 May 2022 16:35:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@mongodb.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66089&quot; title=&quot;Initial sync should do transaction table read with a later afterClusterTime&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66089&quot;&gt;&lt;del&gt;SERVER-66089&lt;/del&gt;&lt;/a&gt; Initial sync should do transaction table read with a later afterClusterTime.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 878b6bb32413dc105133ffac31e9a0cf21e930f4)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fa5d029fd8a6f06e42be69a1ba7842ca35e39333&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fa5d029fd8a6f06e42be69a1ba7842ca35e39333&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4549897" author="xgen-internal-githook" created="Mon, 16 May 2022 14:54:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@mongodb.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66089&quot; title=&quot;Initial sync should do transaction table read with a later afterClusterTime&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66089&quot;&gt;&lt;del&gt;SERVER-66089&lt;/del&gt;&lt;/a&gt; Initial sync should do transaction table read with a later afterClusterTime.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 878b6bb32413dc105133ffac31e9a0cf21e930f4)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d424a76ded97659d5c0933444a3210df82f096e6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d424a76ded97659d5c0933444a3210df82f096e6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4538707" author="matthew.russotto" created="Tue, 10 May 2022 16:12:50 +0000"  >&lt;p&gt;NB: if backporting, make sure to backport &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66356&quot; title=&quot;Fix test failures in initial_sync_with_partial_transaction.js &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66356&quot;&gt;&lt;del&gt;SERVER-66356&lt;/del&gt;&lt;/a&gt; with it.&lt;/p&gt;</comment>
                            <comment id="4536777" author="xgen-internal-githook" created="Mon, 9 May 2022 21:33:06 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@mongodb.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66089&quot; title=&quot;Initial sync should do transaction table read with a later afterClusterTime&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66089&quot;&gt;&lt;del&gt;SERVER-66089&lt;/del&gt;&lt;/a&gt; Initial sync should do transaction table read with a later afterClusterTime.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/878b6bb32413dc105133ffac31e9a0cf21e930f4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/878b6bb32413dc105133ffac31e9a0cf21e930f4&lt;/a&gt;&lt;/p&gt;</comment>
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