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    <title>MongoDB Jira</title>
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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-35821] readConcern:snapshot transactions need a read timestamp &lt;= WT&apos;s all_committed point</title>
                <link>https://jira.mongodb.org/browse/SERVER-35821</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="564409">SERVER-35821</key>
            <summary>readConcern:snapshot transactions need a read timestamp &lt;= WT&apos;s all_committed point</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="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                            <label>todo_in_code</label>
                    </labels>
                <created>Tue, 26 Jun 2018 16:56:28 +0000</created>
                <updated>Sun, 29 Oct 2023 22:30:22 +0000</updated>
                            <resolved>Fri, 14 Sep 2018 14:19:28 +0000</resolved>
                                                    <fixVersion>4.0.3</fixVersion>
                    <fixVersion>4.1.4</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="2130741" author="judah.schvimer" created="Tue, 29 Jan 2019 16:49:33 +0000"  >&lt;p&gt;I&apos;ve filed &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39260&quot; title=&quot;Uncomment test at the bottom of jstests/core/txns/timestamped_reads_wait_for_prepare_oplog_visibility.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39260&quot;&gt;&lt;del&gt;SERVER-39260&lt;/del&gt;&lt;/a&gt; to uncomment it.&lt;/p&gt;</comment>
                            <comment id="2130662" author="matthew.russotto" created="Tue, 29 Jan 2019 16:04:32 +0000"  >&lt;p&gt;I think it was just missed.&lt;/p&gt;</comment>
                            <comment id="2013474" author="xgen-internal-githook" created="Tue, 25 Sep 2018 14:53:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35821&quot; title=&quot;readConcern:snapshot transactions need a read timestamp &amp;lt;= WT&amp;#39;s all_committed point&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35821&quot;&gt;&lt;del&gt;SERVER-35821&lt;/del&gt;&lt;/a&gt; readConcern:snapshot transactions need a read timestamp &amp;lt;= WT&apos;s all_committed point&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c46faf4672c81d4801014981669d770fc65b950e)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/947ced71bb48d01914c17ed91b8245ec6ddf651f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/947ced71bb48d01914c17ed91b8245ec6ddf651f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2003021" author="xgen-internal-githook" created="Fri, 14 Sep 2018 14:18:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35821&quot; title=&quot;readConcern:snapshot transactions need a read timestamp &amp;lt;= WT&amp;#39;s all_committed point&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35821&quot;&gt;&lt;del&gt;SERVER-35821&lt;/del&gt;&lt;/a&gt; readConcern:snapshot transactions need a read timestamp &amp;lt;= WT&apos;s all_committed point&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c46faf4672c81d4801014981669d770fc65b950e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c46faf4672c81d4801014981669d770fc65b950e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1939794" author="matthew.russotto" created="Thu, 5 Jul 2018 18:39:33 +0000"  >&lt;p&gt;FWIW, present behavior is that if there&apos;s a pending write, it will not be read by a transaction with a read-at time after it, even if the pending write is committed at some point during that transaction.  That is, snapshot behavior is preserved but relative ordering of the writes is not.&lt;/p&gt;</comment>
                            <comment id="1931930" author="spencer" created="Tue, 26 Jun 2018 16:58:28 +0000"  >&lt;p&gt;We only need to do this if the actual requested readConcern was snapshot.  We don&apos;t need to do this for local or majority RC.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="716744">SERVER-40123</issuekey>
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            <issuekey id="679647">SERVER-39260</issuekey>
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            <issuekey id="881095">SERVER-42547</issuekey>
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