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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-70847] [CQF] Investigate query timeouts related to snapshot reads on non-conflicting documents</title>
                <link>https://jira.mongodb.org/browse/SERVER-70847</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;With the CQF FF enabled, some queries in jstests/core/txns/prepare_conflict.js and jstests/core/txns/timestamped_reads_wait_for_prepare_oplog_visibility.js time out. I&apos;ve seen this issue on causally_consistent_jscore_txns_passthrough variant and jsCore_txns variant respectively. The tests both mention something along the lines of &quot;Snapshot reads should succeed on non-conflicting documents while a transaction is in prepare&quot;, but the reads are hanging.&lt;/p&gt;

&lt;p&gt;Examples: &lt;a href=&quot;https://spruce.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_80_64_bit_dynamic_all_feature_flags_required_plus_cqf_jsCore_txns_patch_02932c9f9ccef9f27a9975197e8cccf52879c463_634dd73432f4171318c6fd9f_22_10_17_22_29_29/tests?execution=0&amp;amp;sortBy=STATUS&amp;amp;sortDir=ASC&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Here&lt;/a&gt; and &lt;a href=&quot;https://spruce.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_80_64_bit_dynamic_all_feature_flags_required_plus_cqf_causally_consistent_jscore_txns_passthrough_patch_02932c9f9ccef9f27a9975197e8cccf52879c463_634efb6e7742ae7c4035771f_22_10_18_19_16_21/tests?execution=3&amp;amp;sortBy=STATUS&amp;amp;sortDir=ASC&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Here&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Note in one case the query times out, while in the other the test times out. I think this is because only one of the tests added maxTimeMs to queries.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2166858">SERVER-70847</key>
            <summary>[CQF] Investigate query timeouts related to snapshot reads on non-conflicting documents</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="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="hana.pearlman@mongodb.com">Hana Pearlman</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Oct 2022 20:12:01 +0000</created>
                <updated>Thu, 29 Jun 2023 14:12:06 +0000</updated>
                                                                                                <votes>0</votes>
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