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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-29690] MongoS initiated metadata refreshes not based on StaleConfig error may see stale config data</title>
                <link>https://jira.mongodb.org/browse/SERVER-29690</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;MongoS write commands may trigger metadata refresh based on errors other than StaleConfig. In particular, this is what&apos;s happening in the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/66188320dc4f8d4c941160ecc11024690d88dd05/jstests/sharding/coll_epoch_test1.js#L71&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;coll_epoch_test1.js&lt;/tt&gt;&lt;/a&gt; test.&lt;/p&gt;

&lt;p&gt;If a collection gets unsharded on one mongos and a write is scheduled against a different mongos, the second mongos will use a stale config server optime. Because of this, if that read hits a stale config server secondary, it won&apos;t see the change in the sharding state.&lt;/p&gt;

&lt;p&gt;This is an inherent problem, which can only be solved through the support in the causal consistency project, so this ticket is filed just as a placeholder for versions prior to 3.6.&lt;/p&gt;</description>
                <environment></environment>
        <key id="394840">SERVER-29690</key>
            <summary>MongoS initiated metadata refreshes not based on StaleConfig error may see stale config data</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Fri, 16 Jun 2017 17:57:36 +0000</created>
                <updated>Mon, 30 Oct 2023 23:15:58 +0000</updated>
                            <resolved>Mon, 19 Jun 2017 18:42:46 +0000</resolved>
                                    <version>3.2.14</version>
                    <version>3.4.5</version>
                    <version>3.5.8</version>
                                    <fixVersion>3.5.9</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1601003" author="xgen-internal-githook" created="Mon, 19 Jun 2017 18:40:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29690&quot; title=&quot;MongoS initiated metadata refreshes not based on StaleConfig error may see stale config data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29690&quot;&gt;&lt;del&gt;SERVER-29690&lt;/del&gt;&lt;/a&gt; Make coll_epoch_test1.js use causally consistent connections&lt;/p&gt;

&lt;p&gt;Also makes ShardingTest/ReplSetTest support requesting the creation of&lt;br/&gt;
causally consistent connections.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/389168239f4114d0d4087bddd1bd975247c6f03b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/389168239f4114d0d4087bddd1bd975247c6f03b&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="367343">SERVER-28450</issuekey>
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