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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-54899] Pass in point-in-time value used for getHashesUsingSessions() into getCollectionDiffUsingSessions()</title>
                <link>https://jira.mongodb.org/browse/SERVER-54899</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;tt&gt;run_check_repl_dbhash_background.js&lt;/tt&gt;, the &lt;tt&gt;checkCollectionHashesForDB()&lt;/tt&gt; function &lt;a href=&quot;https://github.com/mongodb/mongo/blob/579d4e86984cbc09f01eac084866db3bdbabddec/jstests/hooks/run_check_repl_dbhash_background.js#L199-L200&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;obtains collection hashes&lt;/a&gt; at a given time using &lt;tt&gt;readAtClusterTime&lt;/tt&gt;. This point-in-time value needs to be passed into &lt;tt&gt;getCollectionDiffUsingSessions&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/6ca08d9bf39c3329c3f082bd8c4d869c1ccab1a2/jstests/hooks/run_check_repl_dbhash_background.js#L248-L249&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;too&lt;/a&gt; to produce accurate diffs using the same storage snapshot.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;See &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=max.hirschhorn&quot; class=&quot;user-hover&quot; rel=&quot;max.hirschhorn&quot;&gt;max.hirschhorn&lt;/a&gt;&#160;comment below for more details.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1637460">SERVER-54899</key>
            <summary>Pass in point-in-time value used for getHashesUsingSessions() into getCollectionDiffUsingSessions()</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="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                    </labels>
                <created>Tue, 2 Mar 2021 23:27:37 +0000</created>
                <updated>Sun, 29 Oct 2023 21:56:49 +0000</updated>
                            <resolved>Sat, 6 Mar 2021 03:03:33 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Internal Code</component>
                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3650693" author="xgen-internal-githook" created="Sat, 6 Mar 2021 02:46:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54899&quot; title=&quot;Pass in point-in-time value used for getHashesUsingSessions() into getCollectionDiffUsingSessions()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54899&quot;&gt;&lt;del&gt;SERVER-54899&lt;/del&gt;&lt;/a&gt; Pass in point-in-time value used for getHashesUsingSessions() into getCollectionDiffUsingSessions()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0478f8ca30b2897edb635eef7681581adc6c6300&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0478f8ca30b2897edb635eef7681581adc6c6300&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3643418" author="max.hirschhorn@10gen.com" created="Tue, 2 Mar 2021 23:39:02 +0000"  >&lt;p&gt;The purpose of introducing ReplSetTest#getHashesUsingSessions() and ReplSetTest#getCollectionDiffUsingSessions() as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34779&quot; title=&quot;Check the dbhash periodically in a new version of the replica_sets_jscore_passthrough.yml test suite&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34779&quot;&gt;&lt;del&gt;SERVER-34779&lt;/del&gt;&lt;/a&gt; was so that they would run within the same multi-document transaction and therefore be guaranteed to be using the same storage snapshot.&lt;/p&gt;

&lt;p&gt;It looks like the changes from &lt;a href=&quot;https://github.com/mongodb/mongo/commit/9db1a8dffe753808bea0d8c47d9fc959eaea9ea0#diff-376dd74bb803b1c690a585546311575ecf7f0519288d8b9e10195bb2f1ba1035R187&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;9db1a8d&lt;/a&gt; as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39169&quot; title=&quot;Add testing-only support for doing snapshot reads outside of a transaction&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39169&quot;&gt;&lt;del&gt;SERVER-39169&lt;/del&gt;&lt;/a&gt; missed plumbing the point-in-time value to ReplSetTest#getCollectionDiffUsingSessions() despite &lt;a href=&quot;https://github.com/mongodb/mongo/commit/9db1a8dffe753808bea0d8c47d9fc959eaea9ea0#diff-36de438847eb27cdf626015cac8de40ba662a93ca300347cdd643a0718b12777R1536&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;adding a &lt;tt&gt;readAtClusterTime&lt;/tt&gt; parameter for it&lt;/a&gt;.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10520">
                    <name>Problem/Incident</name>
                                                                <inwardlinks description="is caused by">
                                        <issuelink>
            <issuekey id="677165">SERVER-39169</issuekey>
        </issuelink>
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                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1637491">SERVER-54902</issuekey>
        </issuelink>
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