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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>[DOCS-13562] MongoDB 4.0/4.2 docs incorrect with respect to reading while oplog batches being applied</title>
                <link>https://jira.mongodb.org/browse/DOCS-13562</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;p&gt;The following two pages (both 4.0 and 4.2 versions) state that secondary reads are blocked while oplog batches are being applied:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;&lt;a href=&quot;https://docs.mongodb.com/manual/core/replica-set-sync/#replication&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/core/replica-set-sync/#replication&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://docs.mongodb.com/v4.0/faq/concurrency/#how-does-concurrency-affect-secondaries&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/v4.0/faq/concurrency/#how-does-concurrency-affect-secondaries&lt;/a&gt;&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;My understanding is that behaviour changed in MongoDB 4.0.&lt;/p&gt;

&lt;p&gt;Can someone please confirm and update those pages if they are no longer correct?&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="1302428">DOCS-13562</key>
            <summary>MongoDB 4.0/4.2 docs incorrect with respect to reading while oplog batches being applied</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="andrew.feierabend@mongodb.com">Andrew Feierabend</assignee>
                                    <reporter username="matthew.thompson@mongodb.com">Matthew Thompson</reporter>
                        <labels>
                    </labels>
                <created>Thu, 2 Apr 2020 19:05:26 +0000</created>
                <updated>Mon, 30 Oct 2023 20:23:59 +0000</updated>
                            <resolved>Thu, 2 Apr 2020 21:30:51 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due>Fri, 3 Apr 2020 00:00:00 +0000</due>
                            <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3024189" author="xgen-internal-githook" created="Thu, 2 Apr 2020 21:30:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;, &apos;username&apos;: &apos;andf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13562&quot; title=&quot;MongoDB 4.0/4.2 docs incorrect with respect to reading while oplog batches being applied&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13562&quot;&gt;&lt;del&gt;DOCS-13562&lt;/del&gt;&lt;/a&gt; correct secondary reads no longer blocking FAQ&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/2e332268c22017ffd183c1d382cabccb45ea7555&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/2e332268c22017ffd183c1d382cabccb45ea7555&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3024185" author="xgen-internal-githook" created="Thu, 2 Apr 2020 21:29:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;, &apos;username&apos;: &apos;andf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13562&quot; title=&quot;MongoDB 4.0/4.2 docs incorrect with respect to reading while oplog batches being applied&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13562&quot;&gt;&lt;del&gt;DOCS-13562&lt;/del&gt;&lt;/a&gt; correct secondary reads no longer blocking FAQ&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/729f4f1caf84564bf4f5933ec560fd5eae2268f7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/729f4f1caf84564bf4f5933ec560fd5eae2268f7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3024183" author="xgen-internal-githook" created="Thu, 2 Apr 2020 21:28:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;, &apos;username&apos;: &apos;andf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13562&quot; title=&quot;MongoDB 4.0/4.2 docs incorrect with respect to reading while oplog batches being applied&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13562&quot;&gt;&lt;del&gt;DOCS-13562&lt;/del&gt;&lt;/a&gt; correct secondary reads no longer blocking FAQ&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/2dc1409c25a8891435e994e633fc64ef7fe1cd39&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/2dc1409c25a8891435e994e633fc64ef7fe1cd39&lt;/a&gt;&lt;/p&gt;</comment>
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