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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-57316] Changing a few functions that rely on the presence of epochs/timestamps on config.chunks</title>
                <link>https://jira.mongodb.org/browse/SERVER-57316</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is the second step towards getting rid of epochs/timestamps on config.chunks.&lt;/p&gt;

&lt;p&gt;There are some functions that rely on the presence of epochs/timestamps on config.chunks to indentify a collection. This is fine for 4.4 but not for 5.0 since we plan to remove them. In 5.0 we should use the UUID instead (present on config.collections and config.chunks (since 5.0)).&lt;/p&gt;

&lt;p&gt;Below you can find a list of functions that should be addressed:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;ShardingCatalogManager::ensureChunkVersionIsGreaterThan&lt;/li&gt;
	&lt;li&gt;ShardingCatalogManager::clearJumboFlag&lt;/li&gt;
	&lt;li&gt;ShardingCatalogManager::commitChunkSplit&lt;/li&gt;
	&lt;li&gt;ShardingCatalogManager::commitChunkMerge&lt;/li&gt;
	&lt;li&gt;ShardingCatalogManager::commitChunkMigration&lt;/li&gt;
	&lt;li&gt;Catalog cache refreshes compare the epoch of config.collections and config.chunks to identify inconsistencies.&lt;/li&gt;
&lt;/ol&gt;

</description>
                <environment></environment>
        <key id="1764755">SERVER-57316</key>
            <summary>Changing a few functions that rely on the presence of epochs/timestamps on config.chunks</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="sergi.mateo-bellido@mongodb.com">Sergi Mateo Bellido</assignee>
                                    <reporter username="sergi.mateo-bellido@mongodb.com">Sergi Mateo Bellido</reporter>
                        <labels>
                            <label>PM-1965-Milestone-1</label>
                    </labels>
                <created>Tue, 1 Jun 2021 10:51:47 +0000</created>
                <updated>Sun, 29 Oct 2023 21:52:53 +0000</updated>
                            <resolved>Wed, 16 Jun 2021 13:55:38 +0000</resolved>
                                                    <fixVersion>5.0.0-rc2</fixVersion>
                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4106760" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 18:08:07 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3880973" author="xgen-internal-githook" created="Wed, 16 Jun 2021 13:15:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sergi Mateo Bellido&apos;, &apos;email&apos;: &apos;sergi.mateo-bellido@mongodb.com&apos;, &apos;username&apos;: &apos;smateo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57316&quot; title=&quot;Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57316&quot;&gt;&lt;del&gt;SERVER-57316&lt;/del&gt;&lt;/a&gt; Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 6729afa6c6f081333973601172fafa7c71741508)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/93b146a03ef685c1ea777d7470ab12de30fedeb4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/93b146a03ef685c1ea777d7470ab12de30fedeb4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3880897" author="xgen-internal-githook" created="Wed, 16 Jun 2021 12:43:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sergi Mateo Bellido&apos;, &apos;email&apos;: &apos;sergi.mateo-bellido@mongodb.com&apos;, &apos;username&apos;: &apos;smateo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57316&quot; title=&quot;Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57316&quot;&gt;&lt;del&gt;SERVER-57316&lt;/del&gt;&lt;/a&gt; Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6729afa6c6f081333973601172fafa7c71741508&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6729afa6c6f081333973601172fafa7c71741508&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3877996" author="xgen-internal-githook" created="Tue, 15 Jun 2021 10:37:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sergi Mateo Bellido&apos;, &apos;email&apos;: &apos;sergi.mateo-bellido@mongodb.com&apos;, &apos;username&apos;: &apos;smateo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57316&quot; title=&quot;Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57316&quot;&gt;&lt;del&gt;SERVER-57316&lt;/del&gt;&lt;/a&gt; Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&lt;/p&gt;

&lt;p&gt;The following functions do not rely on the presence of epochs on config.chunks if there is a timestamp on config.collections:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;ensureChunkVersionIsGreaterThan cmd.&lt;/li&gt;
	&lt;li&gt;clearJumboFlag cmd.&lt;/li&gt;
	&lt;li&gt;commitChunkMerge/commitChunksMerge.&lt;/li&gt;
	&lt;li&gt;commitChunkSplit.&lt;/li&gt;
	&lt;li&gt;commitChunkMigration.&lt;/li&gt;
	&lt;li&gt;getMaxChunkVersionFromQueryResponse.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;(cherry picked from commit 108840e0fdd428435b3fbbc1919ddb05311321c7)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5268977d520f944bdf55e1bd4299ff7429bbe8ff&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5268977d520f944bdf55e1bd4299ff7429bbe8ff&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3875554" author="xgen-internal-githook" created="Mon, 14 Jun 2021 12:49:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sergi Mateo Bellido&apos;, &apos;email&apos;: &apos;sergi.mateo-bellido@mongodb.com&apos;, &apos;username&apos;: &apos;smateo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57316&quot; title=&quot;Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57316&quot;&gt;&lt;del&gt;SERVER-57316&lt;/del&gt;&lt;/a&gt; Changing a few functions that rely on the presence of epochs/timestamps on config.chunks&lt;/p&gt;

&lt;p&gt;The following functions do not rely on the presence of epochs on config.chunks if there is a timestamp on config.collections:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;ensureChunkVersionIsGreaterThan cmd.&lt;/li&gt;
	&lt;li&gt;clearJumboFlag cmd.&lt;/li&gt;
	&lt;li&gt;commitChunkMerge/commitChunksMerge.&lt;/li&gt;
	&lt;li&gt;commitChunkSplit.&lt;/li&gt;
	&lt;li&gt;commitChunkMigration.&lt;/li&gt;
	&lt;li&gt;getMaxChunkVersionFromQueryResponse.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/108840e0fdd428435b3fbbc1919ddb05311321c7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/108840e0fdd428435b3fbbc1919ddb05311321c7&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
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