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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-39260] Uncomment test at the bottom of jstests/core/txns/timestamped_reads_wait_for_prepare_oplog_visibility.js</title>
                <link>https://jira.mongodb.org/browse/SERVER-39260</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There is a dangling TODO for &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;&lt;/p&gt;</description>
                <environment></environment>
        <key id="679647">SERVER-39260</key>
            <summary>Uncomment test at the bottom of jstests/core/txns/timestamped_reads_wait_for_prepare_oplog_visibility.js</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="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                            <label>prepare_testing</label>
                            <label>txn_storage</label>
                    </labels>
                <created>Tue, 29 Jan 2019 16:48:45 +0000</created>
                <updated>Sun, 29 Oct 2023 22:24:39 +0000</updated>
                            <resolved>Tue, 2 Apr 2019 14:40:39 +0000</resolved>
                                                    <fixVersion>4.1.10</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2230876" author="judah.schvimer" created="Wed, 1 May 2019 18:22:15 +0000"  >&lt;blockquote&gt;
&lt;p&gt;After &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;, snapshot reads started reading at the majority-committed timestamp&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=louis.williams&quot; class=&quot;user-hover&quot; rel=&quot;louis.williams&quot;&gt;louis.williams&lt;/a&gt;&apos;s comment should have said &quot;all-committed&quot; instead of &quot;majority-committed&quot;. I&apos;ve filed &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40935&quot; title=&quot;Start new transactions for each snapshot read in timestamped_reads_wait_for_prepare_oplog_visibility.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40935&quot;&gt;&lt;del&gt;SERVER-40935&lt;/del&gt;&lt;/a&gt; to make the test test the behavior we expect.&lt;/p&gt;</comment>
                            <comment id="2199127" author="xgen-internal-githook" created="Tue, 2 Apr 2019 14:45:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;louis.williams@mongodb.com&apos;, &apos;name&apos;: &apos;Louis Williams&apos;, &apos;username&apos;: &apos;louiswilliams&apos;}
&lt;p&gt;Message: &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; Uncomment test at the bottom of  jstests/core/txns/timestamped_reads_wait_for_prepare_oplog_visibility.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5661c7cb174ccd776c994141f30f625a976aa444&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5661c7cb174ccd776c994141f30f625a976aa444&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2189040" author="judah.schvimer" created="Fri, 22 Mar 2019 18:49:20 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=louis.williams&quot; class=&quot;user-hover&quot; rel=&quot;louis.williams&quot;&gt;louis.williams&lt;/a&gt;, that seems reasonable. Thank you for looking into it!&lt;/p&gt;</comment>
                            <comment id="2189006" author="louis.williams" created="Fri, 22 Mar 2019 18:26:53 +0000"  >&lt;p&gt;At the time it was written, readConcern: &quot;snapshot&quot; reads could have acquired a read timestamp that was past the all-committed timestamp. This would have been problematic. After &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;, snapshot reads started reading at the majority-committed timestamp, so it is no longer possible for snapshot reads to read at a timestamp that requires waiting for oplog visibility. &lt;/p&gt;

&lt;p&gt;I think we should correct the test so that it resembles the current snapshot read behavior.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="881095">SERVER-42547</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
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            <issuekey id="753393">SERVER-40935</issuekey>
        </issuelink>
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            <issuekey id="564409">SERVER-35821</issuekey>
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