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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-43686] Biggie storage engine should support snapshot ids</title>
                <link>https://jira.mongodb.org/browse/SERVER-43686</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are a few places in the query engine which assume that all storage engines which return &lt;tt&gt;true&lt;/tt&gt; for &lt;tt&gt;supportsDocLocking()&lt;/tt&gt; also support &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9faba94cb86061f5acba467cdd5f88338e712c1f/src/mongo/db/storage/recovery_unit.h#L260-L267&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;RecoveryUnit::getSnapshotId()&lt;/tt&gt;&lt;/a&gt;:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/9faba94cb86061f5acba467cdd5f88338e712c1f/src/mongo/db/exec/write_stage_common.cpp#L50-L55&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Determining whether a document needs to be re-fetched from storage before attempting to update or delete it&lt;/a&gt;.&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/e2875bb82ff99ffb27ccbcd68d596941a427f151/src/mongo/db/exec/working_set_common.cpp#L69-L73&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Determining whether or not to check whether buffered index keys are still consistent with a fetched document in &lt;tt&gt;WorkingSetCommon::fetch()&lt;/tt&gt;&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;This assumption does not hold for the biggie storage engine. This is currently causing query correctness issues leading to the failure of tests &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e2875bb82ff99ffb27ccbcd68d596941a427f151/jstests/core/getmore_invalidated_documents.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;getmore_invalidated_documents.js&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e2875bb82ff99ffb27ccbcd68d596941a427f151/jstests/core/ensure_sorted.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ensure_sorted.js&lt;/a&gt;. These failures were introduced by the code added in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42979&quot; title=&quot;Implement WorkingSet::extract() and WorkingSet::emplace()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42979&quot;&gt;&lt;del&gt;SERVER-42979&lt;/del&gt;&lt;/a&gt; which assumed that doc-locking engines also support snapshot ids. There could be additional latent problems of a similar nature that have not yet been discovered.&lt;/p&gt;</description>
                <environment></environment>
        <key id="943319">SERVER-43686</key>
            <summary>Biggie storage engine should support snapshot ids</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="3">Duplicate</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Fri, 27 Sep 2019 16:53:56 +0000</created>
                <updated>Fri, 27 Sep 2019 16:54:44 +0000</updated>
                            <resolved>Fri, 27 Sep 2019 16:54:44 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
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            <issuekey id="943311">SERVER-43685</issuekey>
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