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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-37929] ShardRegistry in config servers can keep invalid entries after it rolls back until next reload</title>
                <link>https://jira.mongodb.org/browse/SERVER-37929</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When config server rollbacks data its ShardRegistry that is used for targeting gets out of sync. Instead, it should immediately call reload to avoid the inconsistent state.&lt;/p&gt;</description>
                <environment></environment>
        <key id="629421">SERVER-37929</key>
            <summary>ShardRegistry in config servers can keep invalid entries after it rolls back until next reload</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="misha.tyulenev@mongodb.com">Misha Tyulenev</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Mon, 5 Nov 2018 20:20:30 +0000</created>
                <updated>Sun, 29 Oct 2023 22:26:52 +0000</updated>
                            <resolved>Thu, 13 Dec 2018 18:35:24 +0000</resolved>
                                    <version>4.1.4</version>
                                    <fixVersion>4.1.7</fixVersion>
                    <fixVersion>4.0.19</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3057027" author="xgen-internal-githook" created="Mon, 27 Apr 2020 17:25:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Misha Tyulenev&apos;, &apos;email&apos;: &apos;misha@mongodb.com&apos;, &apos;username&apos;: &apos;mikety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37929&quot; title=&quot;ShardRegistry in config servers can keep invalid entries after it rolls back until next reload&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37929&quot;&gt;&lt;del&gt;SERVER-37929&lt;/del&gt;&lt;/a&gt; reload ShardRegistry on config servers on rollback&lt;/p&gt;

&lt;p&gt;(cherry picked from commit fc1b17cfdeffa13b5326050893658e7ba4df57a1)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/35f4172754bec2cc62115f96af14366bf2b8ca1a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/35f4172754bec2cc62115f96af14366bf2b8ca1a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2089991" author="xgen-internal-githook" created="Thu, 13 Dec 2018 18:34:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;mikety&apos;, &apos;email&apos;: &apos;misha@mongodb.com&apos;, &apos;name&apos;: &apos;Misha Tyulenev&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37929&quot; title=&quot;ShardRegistry in config servers can keep invalid entries after it rolls back until next reload&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37929&quot;&gt;&lt;del&gt;SERVER-37929&lt;/del&gt;&lt;/a&gt; reload ShardRegistry on config servers on rollback&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fc1b17cfdeffa13b5326050893658e7ba4df57a1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fc1b17cfdeffa13b5326050893658e7ba4df57a1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2079303" author="judah.schvimer" created="Mon, 3 Dec 2018 22:53:54 +0000"  >&lt;p&gt;Looks good with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jack.mulrow&quot; class=&quot;user-hover&quot; rel=&quot;jack.mulrow&quot;&gt;jack.mulrow&lt;/a&gt;&apos;s suggestions.&lt;/p&gt;</comment>
                            <comment id="2079164" author="jack.mulrow" created="Mon, 3 Dec 2018 21:29:39 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=misha.tyulenev&quot; class=&quot;user-hover&quot; rel=&quot;misha.tyulenev&quot;&gt;misha.tyulenev&lt;/a&gt; SGTM. I think that method is only called by the rollback to a WiredTiger checkpoint code path, so we&apos;ll also want to reload the registry at the end of the other rollback code path &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b12875f9e3132/src/mongo/db/repl/rs_rollback.cpp#L1441&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;&#160;(rollback via refetch). Also, it looks like all configsvr commands set their ReadConcernArgs opCtx decoration read concern level to kLocal (e.g. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/19e5f8eb5e/src/mongo/db/s/config/configsvr_add_shard_command.cpp#L102-L104&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_configsvrAddShard&lt;/a&gt;), so we&apos;ll want to do that when reloading as well.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="687774">SERVER-39498</issuekey>
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