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    <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-41093] Primary shard can accept writes for chunk it does not own if _shardsvrShardCollection receives error when writing to config server</title>
                <link>https://jira.mongodb.org/browse/SERVER-41093</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It&apos;s possible during shardCollection for the following to occur&lt;br/&gt;
1. _configsvrShardCollection is sent to the config server&lt;br/&gt;
2. The config server sends _shardsvrShardCollection to a shard&lt;br/&gt;
3. The shard sends an update to the config server to add the collection to the &apos;config.collections&apos; collection&lt;br/&gt;
4. That update succeeds on the config server, but the shard receives some error like NetworkInterfaceExceededTimeLimit, so that it does not hear back from the config server or know whether or not the write succeeded&lt;br/&gt;
5. The _shardsvrShardCollection fails, but the config server thinks that collection is sharded, so there&apos;s a mismatch between the shard and the config server&lt;/p&gt;

&lt;p&gt;If the shard then received an unversioned write to that collection, it would not refresh its routing table, and would treat the collection as unsharded and write the document locally. This could be problematic though, if another write goes through a different router, which does do a refresh from the config server and finds the collection is sharded, and writes data to the correct place.&lt;/p&gt;</description>
                <environment></environment>
        <key id="764346">SERVER-41093</key>
            <summary>Primary shard can accept writes for chunk it does not own if _shardsvrShardCollection receives error when writing to config server</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-sharding-emea">[DO NOT USE] Backlog - Sharding EMEA</assignee>
                                    <reporter username="matthew.saltz@mongodb.com">Matthew Saltz</reporter>
                        <labels>
                            <label>pm-1051-legacy-tickets</label>
                            <label>sharding-causes-bfs-hard</label>
                    </labels>
                <created>Fri, 10 May 2019 18:42:55 +0000</created>
                <updated>Fri, 27 Oct 2023 20:42:51 +0000</updated>
                            <resolved>Mon, 26 Jul 2021 15:33:13 +0000</resolved>
                                                    <fixVersion>4.3 Desired</fixVersion>
                    <fixVersion>5.0.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3963025" author="kaloian.manassiev" created="Mon, 26 Jul 2021 15:33:13 +0000"  >&lt;p&gt;As of FCV 5.0, this situation is no longer possible so closing this as &apos;Gone Away&apos;.&lt;/p&gt;
</comment>
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