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    <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-78296] Ban reads with readConcern snapshot on pre-images and change collection tables</title>
                <link>https://jira.mongodb.org/browse/SERVER-78296</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Pre-images and change collection tables prune old content using untimestamped truncates. A read establishing a snapshot at a point in time (PIT) may see data inconsistent with that PIT: data that should have been present at that PIT will be missing if it was truncated, since a non-truncated operation effectively overwrites history.&lt;/p&gt;

&lt;p&gt;This behaviour is similar to capped collections before they replicated deletes explicitly (i.e. before &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16049&quot; title=&quot;Replicate capped collection deletes explicitly&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16049&quot;&gt;&lt;del&gt;SERVER-16049&lt;/del&gt;&lt;/a&gt;); we similarly banned reads with snapshot read concern on those (see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47574&quot; title=&quot;Ban non-transaction snapshot reads on capped collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47574&quot;&gt;&lt;del&gt;SERVER-47574&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47824&quot; title=&quot;Ban transaction snapshot reads on capped collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47824&quot;&gt;&lt;del&gt;SERVER-47824&lt;/del&gt;&lt;/a&gt;).&lt;/p&gt;</description>
                <environment></environment>
        <key id="2373733">SERVER-78296</key>
            <summary>Ban reads with readConcern snapshot on pre-images and change collection tables</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="13201">Fixed</resolution>
                                        <assignee username="miquel.munoz@mongodb.com">Miquel Munoz</assignee>
                                    <reporter username="josef.ahmad@mongodb.com">Josef Ahmad</reporter>
                        <labels>
                    </labels>
                <created>Wed, 21 Jun 2023 15:45:16 +0000</created>
                <updated>Sun, 29 Oct 2023 21:19:43 +0000</updated>
                            <resolved>Fri, 1 Sep 2023 08:18:01 +0000</resolved>
                                                    <fixVersion>7.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5674061" author="xgen-internal-githook" created="Fri, 1 Sep 2023 09:36:52 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Miquel Munoz&apos;, &apos;email&apos;: &apos;miquelmunozz@gmail.com&apos;, &apos;username&apos;: &apos;mimugara&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78296&quot; title=&quot;Ban reads with readConcern snapshot on pre-images and change collection tables&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78296&quot;&gt;&lt;del&gt;SERVER-78296&lt;/del&gt;&lt;/a&gt; Ban reads with readConcern snapshot on pre-images and change collection tables&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d7520f702397275fe1bbef22641de629929ba352&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d7520f702397275fe1bbef22641de629929ba352&lt;/a&gt;&lt;/p&gt;</comment>
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