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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-51683] Await configRS optime replication before to stop it in lagged_config_secondary.js</title>
                <link>https://jira.mongodb.org/browse/SERVER-51683</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In order to perform &lt;a href=&quot;https://github.com/mongodb/mongo/blob/35d7e75bca7cae7bfc984db0dbc1a5099821ccc4/jstests/sharding/lagged_config_secondary.js#L35&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this insertion&lt;/a&gt; the mongos will try to fetch the collection information from the config replica set, it will use nearest read preference and a majority read concern with the lastest opTime he is aware of. Obviously this insertion could fail if the request hit a secondary node of the config repl that is not able to satisfy the specified majority read concern.&lt;/p&gt;

&lt;p&gt;The problem is that the test doesn&apos;t guarantees that the requested optime has been replicated to all secondaries when that insertion is executed, in fact between the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/35d7e75bca7cae7bfc984db0dbc1a5099821ccc4/jstests/sharding/lagged_config_secondary.js#L23-L24&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;awaitReplication&lt;/a&gt; and the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/35d7e75bca7cae7bfc984db0dbc1a5099821ccc4/jstests/sharding/lagged_config_secondary.js#L32&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stop of the replication on the config replica set&lt;/a&gt;, the opTime could be bumped on the mongos.&lt;/p&gt;

&lt;p&gt;In particular in the test we saw that the uptime reporter on the mongos could ran in this time window (from awaitReplication to stopReplication) and cause the optime to bump.&lt;/p&gt;

&lt;p&gt;The proposed solution is to move the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/35d7e75bca7cae7bfc984db0dbc1a5099821ccc4/jstests/sharding/lagged_config_secondary.js#L23-L24&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;awaitReplication&lt;/a&gt; just before the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/35d7e75bca7cae7bfc984db0dbc1a5099821ccc4/jstests/sharding/lagged_config_secondary.js#L32&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stopReplication call&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1516742">SERVER-51683</key>
            <summary>Await configRS optime replication before to stop it in lagged_config_secondary.js</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="tommaso.tocci@mongodb.com">Tommaso Tocci</assignee>
                                    <reporter username="tommaso.tocci@mongodb.com">Tommaso Tocci</reporter>
                        <labels>
                    </labels>
                <created>Fri, 16 Oct 2020 11:25:23 +0000</created>
                <updated>Sun, 29 Oct 2023 22:01:50 +0000</updated>
                            <resolved>Thu, 22 Oct 2020 12:05:45 +0000</resolved>
                                    <version>4.7.0</version>
                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3458549" author="xgen-internal-githook" created="Thu, 22 Oct 2020 05:40:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Tommaso Tocci&apos;, &apos;email&apos;: &apos;tommaso.tocci@mongodb.com&apos;, &apos;username&apos;: &apos;toto-dev&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51683&quot; title=&quot;Await configRS optime replication before to stop it in lagged_config_secondary.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51683&quot;&gt;&lt;del&gt;SERVER-51683&lt;/del&gt;&lt;/a&gt; Disable the uptime reporter thread in lagged_config_secondary.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/184e8acc583a9ee8fd9b928138c3b79bb9416cc2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/184e8acc583a9ee8fd9b928138c3b79bb9416cc2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3451295" author="tommaso.tocci" created="Mon, 19 Oct 2020 08:40:47 +0000"  >&lt;p&gt;Reopening this because it occurred again after the first fix attempt&lt;/p&gt;</comment>
                            <comment id="3449018" author="xgen-internal-githook" created="Fri, 16 Oct 2020 15:46:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Tommaso Tocci&apos;, &apos;email&apos;: &apos;tommaso.tocci@mongodb.com&apos;, &apos;username&apos;: &apos;toto-dev&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51683&quot; title=&quot;Await configRS optime replication before to stop it in lagged_config_secondary.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51683&quot;&gt;&lt;del&gt;SERVER-51683&lt;/del&gt;&lt;/a&gt; Await configRS optime replication before to stop it in lagged_config_secondary.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/77a42ecdd91ae10d2953d592b899e05d5aeca0a4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/77a42ecdd91ae10d2953d592b899e05d5aeca0a4&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="884025">SERVER-42632</issuekey>
        </issuelink>
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            <issuekey id="1520383">SERVER-51775</issuekey>
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