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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-47959] Retry JournalFlusher oplog reads on WriteConflictExceptions caused by concurrent {full:true} validate command on the oplog collection</title>
                <link>https://jira.mongodb.org/browse/SERVER-47959</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="1340607">SERVER-47959</key>
            <summary>Retry JournalFlusher oplog reads on WriteConflictExceptions caused by concurrent {full:true} validate command on the oplog collection</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="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Tue, 5 May 2020 16:36:13 +0000</created>
                <updated>Sun, 29 Oct 2023 22:08:40 +0000</updated>
                            <resolved>Wed, 6 May 2020 15:50:13 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                    <fixVersion>4.4.2</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3393087" author="xgen-internal-githook" created="Mon, 14 Sep 2020 19:28:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Lingzhi Deng&apos;, &apos;email&apos;: &apos;lingzhi.deng@mongodb.com&apos;, &apos;username&apos;: &apos;ldennis&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45626&quot; title=&quot;Consistent Oplog Locking Rules&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45626&quot;&gt;&lt;del&gt;SERVER-45626&lt;/del&gt;&lt;/a&gt;: Introduce AutoGetOplog for consistent oplog locking rules &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46930&quot; title=&quot;AutoGetOplog doesn&amp;#39;t acquire collection IX lock correctly for non-document-locking engines&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46930&quot;&gt;&lt;del&gt;SERVER-46930&lt;/del&gt;&lt;/a&gt;: Fix AutoGetOplog for non-document-locking storage engines &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47959&quot; title=&quot;Retry JournalFlusher oplog reads on WriteConflictExceptions caused by concurrent {full:true} validate command on the oplog collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47959&quot;&gt;&lt;del&gt;SERVER-47959&lt;/del&gt;&lt;/a&gt; JournalFlusher will retry oplog reads on WriteConflictExceptions caused by a concurrent &lt;/p&gt;
{full:true}
&lt;p&gt; validate command on the oplog collection&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c15e8ae74071482d69179c7e5e5e6bdc882d2beb)&lt;br/&gt;
(cherry picked from commit 4c4cd897f09a85441ad60058b42ea1149b65d7de)&lt;br/&gt;
(cherry picked from commit dcc42b3db40ecc1cb3ca278d9dcc2208a6c7734a)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/503dce2ce6465116cd05d04e4ea88f837e406e8d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/503dce2ce6465116cd05d04e4ea88f837e406e8d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3072089" author="xgen-internal-githook" created="Wed, 6 May 2020 16:12:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;email&apos;: &apos;dianna.hohensee@mongodb.com&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47959&quot; title=&quot;Retry JournalFlusher oplog reads on WriteConflictExceptions caused by concurrent {full:true} validate command on the oplog collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47959&quot;&gt;&lt;del&gt;SERVER-47959&lt;/del&gt;&lt;/a&gt; JournalFlusher will retry oplog reads on WriteConflictExceptions caused by a concurrent &lt;/p&gt;
{full:true}
&lt;p&gt; validate command on the oplog collection&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dcc42b3db40ecc1cb3ca278d9dcc2208a6c7734a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dcc42b3db40ecc1cb3ca278d9dcc2208a6c7734a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3072032" author="dianna.hohensee" created="Wed, 6 May 2020 15:50:13 +0000"  >&lt;p&gt;This is caused by not taking oplog collection level intent locks internally anymore, so reads can run concurrently with validate cmd&apos;s MODE_X oplog collection lock while calling WT::verify on the oplog collection.&lt;/p&gt;

&lt;p&gt;No need to backport because that change (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45626&quot; title=&quot;Consistent Oplog Locking Rules&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45626&quot;&gt;&lt;del&gt;SERVER-45626&lt;/del&gt;&lt;/a&gt;) only occurred in v4.5&lt;/p&gt;</comment>
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