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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
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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-38673] Re-enable sharded change streams update lookup tests that use last stable mongos version</title>
                <link>https://jira.mongodb.org/browse/SERVER-38673</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The following tests were disabled from running in the &lt;tt&gt;sharding_last_stable_mongos_and_mixed_shards&lt;/tt&gt; because they run sharded lookup queries and will not work when mongos is running on a version that doesn&apos;t support speculative majority find queries:&lt;/p&gt;


&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;When all the backports for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37560&quot; title=&quot;Allow change streams to work with speculative majority reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37560&quot;&gt;&lt;del&gt;SERVER-37560&lt;/del&gt;&lt;/a&gt; are complete, we can re-enable these tests.&lt;/p&gt;</description>
                <environment></environment>
        <key id="655960">SERVER-38673</key>
            <summary>Re-enable sharded change streams update lookup tests that use last stable mongos version</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="william.schultz@mongodb.com">William Schultz</assignee>
                                    <reporter username="william.schultz@mongodb.com">William Schultz</reporter>
                        <labels>
                            <label>open_todo_in_code</label>
                    </labels>
                <created>Mon, 17 Dec 2018 17:12:13 +0000</created>
                <updated>Sun, 29 Oct 2023 22:25:38 +0000</updated>
                            <resolved>Mon, 30 Sep 2019 21:50:01 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2441319" author="xgen-internal-githook" created="Mon, 30 Sep 2019 21:26:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;William Schultz&apos;, &apos;username&apos;: &apos;will62794&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38673&quot; title=&quot;Re-enable sharded change streams update lookup tests that use last stable mongos version&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38673&quot;&gt;&lt;del&gt;SERVER-38673&lt;/del&gt;&lt;/a&gt; Re-enable sharded change streams update lookup tests that use last stable mongos version&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b205f38fc66719a74790c1276920ee89253fbd29&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b205f38fc66719a74790c1276920ee89253fbd29&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2405429" author="william.schultz" created="Tue, 3 Sep 2019 15:10:58 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=judah.schvimer&quot; class=&quot;user-hover&quot; rel=&quot;judah.schvimer&quot;&gt;judah.schvimer&lt;/a&gt; Yes.&lt;/p&gt;</comment>
                            <comment id="2398489" author="judah.schvimer" created="Wed, 28 Aug 2019 21:28:08 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=william.schultz&quot; class=&quot;user-hover&quot; rel=&quot;william.schultz&quot;&gt;william.schultz&lt;/a&gt;, is this ready to be done now?&lt;/p&gt;</comment>
                            <comment id="2232224" author="william.schultz" created="Thu, 2 May 2019 15:29:12 +0000"  >&lt;p&gt;These tests were disabled in the suites that use a 4.0 mongoS and 4.2 mongoD. (or equivalently a 3.6 mongoS and 4.0 mongoDs on the 4.0 branch). In 4.2, we added a new argument &quot;allowSpeculativeMajorityRead&quot; to the find command, which is what allows &apos;find&apos; commands to utilize speculative majority read concern on mongoD nodes. If the mongoS is running 4.0, though, it won&apos;t properly attach this flag when sending a &apos;find&apos; command to a 4.2 shard for an update lookup query. So, the node will reject the query saying that &quot;majority&quot; read concern is not enabled (when EMRC=false). Presumably we should just consider this mixed version configuration as unsupported for speculative majority change streams. I&apos;m not entirely sure what the precedent is in terms of other features that have added new required command flags that are unsupported by older mongoS versions. In 4.3, though, we should be able to re-enable these tests, once 4.2 becomes the &apos;last-stable&apos; version.&lt;/p&gt;</comment>
                            <comment id="2232181" author="greg.mckeon" created="Thu, 2 May 2019 15:10:09 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tess.avitabile&quot; class=&quot;user-hover&quot; rel=&quot;tess.avitabile&quot;&gt;tess.avitabile&lt;/a&gt; is this closeable, or will we need to do this in 4.3?&lt;/p&gt;</comment>
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