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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-36283] Initial sync oplog application does not set oplog visibility on completion</title>
                <link>https://jira.mongodb.org/browse/SERVER-36283</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For correctness and performance reasons, secondaries do not update oplog visibility when write units of work commit, but rather &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f165a6aac867472f38bd0d6f52fcf39e2be17ce6/src/mongo/db/repl/sync_tail.cpp#L848-L851&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;at the end of applying a batch&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;The batch completion logic for initial sync &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f165a6aac867472f38bd0d6f52fcf39e2be17ce6/src/mongo/db/repl/initial_syncer.cpp#L1033-L1070&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;is separate&lt;/a&gt; and does not seem to contain an analogous clause.&lt;/p&gt;

&lt;p&gt;This can result in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f165a6aac867472f38bd0d6f52fcf39e2be17ce6/src/mongo/db/repl/initial_syncer.cpp#L413&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;hangs finishing up initial sync&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="576154">SERVER-36283</key>
            <summary>Initial sync oplog application does not set oplog visibility on completion</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="daniel.gottlieb@mongodb.com">Daniel Gottlieb</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Wed, 25 Jul 2018 16:45:49 +0000</created>
                <updated>Sun, 29 Oct 2023 22:29:33 +0000</updated>
                            <resolved>Fri, 27 Jul 2018 00:02:42 +0000</resolved>
                                                    <fixVersion>4.0.1</fixVersion>
                    <fixVersion>4.1.2</fixVersion>
                                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="1958719" author="xgen-internal-githook" created="Fri, 27 Jul 2018 16:38:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;, &apos;username&apos;: &apos;dgottlieb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36283&quot; title=&quot;Initial sync oplog application does not set oplog visibility on completion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36283&quot;&gt;&lt;del&gt;SERVER-36283&lt;/del&gt;&lt;/a&gt;: Have initial sync completion advance oplog visibility to the initial sync time.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 9568dc3d2fb7244d75744c70c3ac98a8719ca9ab)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9d5a4298d2dd876d0762b27221332f0d9cc1871e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9d5a4298d2dd876d0762b27221332f0d9cc1871e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1958079" author="xgen-internal-githook" created="Fri, 27 Jul 2018 00:02:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;, &apos;username&apos;: &apos;dgottlieb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36283&quot; title=&quot;Initial sync oplog application does not set oplog visibility on completion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36283&quot;&gt;&lt;del&gt;SERVER-36283&lt;/del&gt;&lt;/a&gt;: Have initial sync completion advance oplog visibility to the initial sync time.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9568dc3d2fb7244d75744c70c3ac98a8719ca9ab&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9568dc3d2fb7244d75744c70c3ac98a8719ca9ab&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1956475" author="daniel.gottlieb@10gen.com" created="Wed, 25 Jul 2018 17:40:10 +0000"  >&lt;p&gt;Good question. I don&apos;t believe this affects 3.6. Advancing visibility has changed.&lt;/p&gt;

&lt;p&gt;While 3.6 &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9766b4fc26fe053d6c6f92dc75500e4c1d4f5346/src/mongo/db/repl/initial_syncer.cpp#L393&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;does have the waitForAllEarlierWritesToBeVisible&lt;/a&gt; requirement to complete initial sync, the 3.6 version of &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9766b4fc26fe053d6c6f92dc75500e4c1d4f5346/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp#L1065&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;setOldestTimestamp advanced the oplog visibility timestamp&lt;/a&gt;. Oplog application during initial sync (&quot;startup2&quot;) &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9766b4fc26fe053d6c6f92dc75500e4c1d4f5346/src/mongo/db/repl/replication_coordinator_impl.cpp#L1159-L1164&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;advances the oldest timestamp to the end of each batch&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1956456" author="bruce.lucas@10gen.com" created="Wed, 25 Jul 2018 17:22:48 +0000"  >&lt;p&gt;Does this affect 3.6 or only 4.0?&lt;/p&gt;</comment>
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