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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-19208] Implement read committed on secondaries</title>
                <link>https://jira.mongodb.org/browse/SERVER-19208</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In the initial implementation they are not able to advance their commit point so they are never able to retire old snapshots.&lt;/p&gt;</description>
                <environment></environment>
        <key id="213863">SERVER-19208</key>
            <summary>Implement read committed on secondaries</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="9">Done</resolution>
                                        <assignee username="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                    </labels>
                <created>Mon, 29 Jun 2015 21:25:12 +0000</created>
                <updated>Thu, 2 Aug 2018 21:24:57 +0000</updated>
                            <resolved>Tue, 7 Jul 2015 15:02:37 +0000</resolved>
                                                    <fixVersion>3.1.6</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1016264" author="xgen-internal-githook" created="Thu, 27 Aug 2015 18:55:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19208&quot; title=&quot;Implement read committed on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19208&quot;&gt;&lt;del&gt;SERVER-19208&lt;/del&gt;&lt;/a&gt; Add a basic test of majority readConcern on secondaries&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/40960734644db59ee630b26ac8398139440a63b5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/40960734644db59ee630b26ac8398139440a63b5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="963560" author="xgen-internal-githook" created="Fri, 10 Jul 2015 19:59:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dannenberg&apos;, u&apos;name&apos;: u&apos;matt dannenberg&apos;, u&apos;email&apos;: u&apos;matt.dannenberg@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19208&quot; title=&quot;Implement read committed on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19208&quot;&gt;&lt;del&gt;SERVER-19208&lt;/del&gt;&lt;/a&gt; some unittests for committed snapshots&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/27e0f7a4b5b407d43de33db941cd413ea46399cd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/27e0f7a4b5b407d43de33db941cd413ea46399cd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="959480" author="xgen-internal-githook" created="Tue, 7 Jul 2015 14:49:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19234&quot; title=&quot;Ensure that during idle periods, the latest write becomes visible to committed reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19234&quot;&gt;&lt;del&gt;SERVER-19234&lt;/del&gt;&lt;/a&gt; Move tracking of snapshots to ReplicationCoordinator from ExternalState&lt;/p&gt;

&lt;p&gt;This allows blessing a snapshot as committed if it is created after its&lt;br/&gt;
OpTime has been marked as committed.&lt;/p&gt;

&lt;p&gt;This commit also resolves &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19208&quot; title=&quot;Implement read committed on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19208&quot;&gt;&lt;del&gt;SERVER-19208&lt;/del&gt;&lt;/a&gt; (read committed on secondaries) by&lt;br/&gt;
unifying the code to advance the commit point on both primaries and&lt;br/&gt;
secondaries.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bbcf151c248fde365755a07d88af4fdc401cf5ac&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bbcf151c248fde365755a07d88af4fdc401cf5ac&lt;/a&gt;&lt;/p&gt;</comment>
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