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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>
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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-66658] Shard registry might be accessed before initialization</title>
                <link>https://jira.mongodb.org/browse/SERVER-66658</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57280&quot; title=&quot;ShardRegistry must be initialized before DDL coordinators contact any shard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57280&quot;&gt;&lt;del&gt;SERVER-57280&lt;/del&gt;&lt;/a&gt; introduced a mechanism that tried to prevent accesses to the shard registry via the &lt;a href=&quot;https://github.com/10gen/mongo/blob/66e938045f87c72f379eb0def449b62bde97721c/src/mongo/s/client/shard_registry.h#L312&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;getShardNoReload&lt;/a&gt; before &lt;a href=&quot;https://github.com/10gen/mongo/blob/66e938045f87c72f379eb0def449b62bde97721c/src/mongo/db/s/sharding_ddl_util.cpp#L203&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;setting up the shard registry&lt;/a&gt;. However, there is a race that can happen after &lt;a href=&quot;https://github.com/10gen/mongo/blob/66e938045f87c72f379eb0def449b62bde97721c/src/mongo/s/client/shard_registry.cpp#L193&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;setting the isUp&lt;/a&gt; variable from a thread that is performing the first refresh, and another thread &lt;a href=&quot;https://github.com/10gen/mongo/blob/66e938045f87c72f379eb0def449b62bde97721c/src/mongo/db/s/sharding_ddl_util.cpp#L192&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;using the non causally consistent API&lt;/a&gt;, that might result on the shard registry not finding any shard if the node have been recently started.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2052669">SERVER-66658</key>
            <summary>Shard registry might be accessed before initialization</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="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</reporter>
                        <labels>
                    </labels>
                <created>Mon, 23 May 2022 14:26:55 +0000</created>
                <updated>Sun, 29 Oct 2023 21:37:56 +0000</updated>
                            <resolved>Wed, 25 May 2022 09:01:19 +0000</resolved>
                                    <version>5.0.7</version>
                    <version>6.0.0-rc6</version>
                                    <fixVersion>6.0.1</fixVersion>
                    <fixVersion>5.0.10</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4697623" author="xgen-internal-githook" created="Fri, 22 Jul 2022 10:06:56 +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-66658&quot; title=&quot;Shard registry might be accessed before initialization&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66658&quot;&gt;&lt;del&gt;SERVER-66658&lt;/del&gt;&lt;/a&gt; Shard registry might be accessed before initialization&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 4851768e1d7c54e576300c75a976910e96703458)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a1189eadd80ceedf5f6926e3127d65a03cff5af3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a1189eadd80ceedf5f6926e3127d65a03cff5af3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4671652" author="xgen-internal-githook" created="Mon, 11 Jul 2022 19:25:45 +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-66658&quot; title=&quot;Shard registry might be accessed before initialization&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66658&quot;&gt;&lt;del&gt;SERVER-66658&lt;/del&gt;&lt;/a&gt; Shard registry might be accessed before initialization&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 4851768e1d7c54e576300c75a976910e96703458)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b9a8d8bc44181a0fe9b39525abb98620b9440c90&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b9a8d8bc44181a0fe9b39525abb98620b9440c90&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4571559" author="xgen-internal-githook" created="Wed, 25 May 2022 09:00:12 +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-66658&quot; title=&quot;Shard registry might be accessed before initialization&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66658&quot;&gt;&lt;del&gt;SERVER-66658&lt;/del&gt;&lt;/a&gt; Shard registry might be accessed before initialization&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4851768e1d7c54e576300c75a976910e96703458&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4851768e1d7c54e576300c75a976910e96703458&lt;/a&gt;&lt;/p&gt;</comment>
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