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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-34659] Reevaluate whether a forced refresh is necessary in the commit phase of the MigrationSourceManager</title>
                <link>https://jira.mongodb.org/browse/SERVER-34659</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the MigrationSourceManager forces a fresh of sharding metadata after a commit has been attempted, no matter whether the commit succeeds or fails. A refresh is costly and shouldn&apos;t be necessary every time.&lt;/p&gt;

&lt;p&gt;Instead, we should do the following:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;After a commit attempt (both success AND failure), clear the shard version on the source shard.&lt;/li&gt;
	&lt;li&gt;On a successful commit, return without refreshing.&lt;/li&gt;
	&lt;li&gt;On a failed commit, return the commit status.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;That assures the following behavior:&lt;/p&gt;

&lt;p&gt;If the commit fails, then when attempting to access this chunk, the source shard will refresh from the config server and reassume ownership for that chunk.&lt;/p&gt;

&lt;p&gt;If the commit succeeds, then when attempting to access this chunk, the source shard will refresh from the config server and find out it&apos;s not the owner of the chunk. The mongos will then reroute access to the destination shard.&lt;/p&gt;</description>
                <environment></environment>
        <key id="533511">SERVER-34659</key>
            <summary>Reevaluate whether a forced refresh is necessary in the commit phase of the MigrationSourceManager</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="blake.oler@mongodb.com">Blake Oler</reporter>
                        <labels>
                    </labels>
                <created>Tue, 24 Apr 2018 20:58:32 +0000</created>
                <updated>Tue, 6 Dec 2022 03:31:21 +0000</updated>
                            <resolved>Tue, 22 Jan 2019 20:05:40 +0000</resolved>
                                    <version>3.7.6</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2123254" author="greg.mckeon" created="Tue, 22 Jan 2019 20:05:40 +0000"  >&lt;p&gt;We&apos;re going to need to come up with a more complete solution after doing &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32198&quot; title=&quot;Missing collection metadata on the shard implies both UNSHARDED and &amp;quot;metadata not loaded yet&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32198&quot;&gt;&lt;del&gt;SERVER-32198&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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