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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-31028] Reload shard registry and ensure set of shards hasn&apos;t changed when establishing sharded change stream cursors</title>
                <link>https://jira.mongodb.org/browse/SERVER-31028</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When establishing a change stream cursor on a sharded collection, mongos will try to establish cursors on all shards it knows about.  To protect against a shard being added during this process, mongos will first establish cursors on every shard it knows about from its cache of the shard registry, then after all cursors have been established, it will force the shard registry to reload from the config servers and ensure that no new shards have been added.  If a new shard is found, it will need to establish a cursor on any new shards, then redo the shard registry reload and recheck for new shards.&lt;/p&gt;</description>
                <environment></environment>
        <key id="426062">SERVER-31028</key>
            <summary>Reload shard registry and ensure set of shards hasn&apos;t changed when establishing sharded change stream cursors</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="matthew.russotto@mongodb.com">Matthew Russotto</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                            <label>bkp</label>
                    </labels>
                <created>Mon, 11 Sep 2017 14:58:52 +0000</created>
                <updated>Mon, 30 Oct 2023 23:13:42 +0000</updated>
                            <resolved>Wed, 15 Nov 2017 00:22:44 +0000</resolved>
                                                    <fixVersion>3.6.0-rc5</fixVersion>
                                    <component>Querying</component>
                    <component>Replication</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1725959" author="xgen-internal-githook" created="Wed, 15 Nov 2017 00:20:06 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;username&apos;: &apos;mtrussotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31028&quot; title=&quot;Reload shard registry and ensure set of shards hasn&amp;#39;t changed when establishing sharded change stream cursors&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31028&quot;&gt;&lt;del&gt;SERVER-31028&lt;/del&gt;&lt;/a&gt; Reload shard registry and ensure set of shards hasn&apos;t changed when establishing sharded change stream cursors&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 22e18d7f0ee7eede964c27b444035544f7b8cf68)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2bfcf6623b3324a26ca5aa4fd4d1d1906be402f4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2bfcf6623b3324a26ca5aa4fd4d1d1906be402f4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1725938" author="xgen-internal-githook" created="Tue, 14 Nov 2017 23:59:35 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;username&apos;: &apos;mtrussotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31028&quot; title=&quot;Reload shard registry and ensure set of shards hasn&amp;#39;t changed when establishing sharded change stream cursors&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31028&quot;&gt;&lt;del&gt;SERVER-31028&lt;/del&gt;&lt;/a&gt; Reload shard registry and ensure set of shards hasn&apos;t changed when establishing sharded change stream cursors&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/22e18d7f0ee7eede964c27b444035544f7b8cf68&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/22e18d7f0ee7eede964c27b444035544f7b8cf68&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1707404" author="matthew.russotto" created="Tue, 24 Oct 2017 15:47:09 +0000"  >&lt;p&gt;This may be obsoleted (except the test) by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31685&quot; title=&quot;Sharded change streams can miss notifications&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31685&quot;&gt;&lt;del&gt;SERVER-31685&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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