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    <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-75431] Get rid or fix best effort check for primary db on rename path in sharded clusters</title>
                <link>https://jira.mongodb.org/browse/SERVER-75431</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a rename collection between different dbs is received by the (potential) primary shard of the source collection, a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1f6281e1193a2d81e003bae0989318dab730a14/src/mongo/db/s/shardsvr_rename_collection_command.cpp#L93-L95&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;best effort check&lt;/a&gt; is executed before spawning the coordinator to make sure that both databases reside on the same shard (it&apos;s not allowed to rename collections between dbs with a different primary shard).&lt;/p&gt;

&lt;p&gt;The check relies &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1f6281e1193a2d81e003bae0989318dab730a14/src/mongo/db/s/sharding_ddl_util.cpp#L775-L776&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;on cached info&lt;/a&gt; that may be stale, so the rename may fail even when both dbs reside on the same primary.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Solution 1&lt;/b&gt;&lt;br/&gt;
Change &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1f6281e1193a2d81e003bae0989318dab730a14/src/mongo/db/s/sharding_ddl_util.cpp#L775-L776&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt; check in order to refresh. The advantage is that rename operations can prematurely fail without serializing on the DDL lock when the dbs reside on different primary shards.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Solution 2&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;Simply get rid of the check because &lt;a href=&quot;https://github.com/10gen/mongo/blob/70b22fa62fda2d5549ca200d86ca39b2602dce1b/src/mongo/db/s/rename_collection_coordinator.cpp#L238&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the same check&lt;/a&gt; is performed after spawning the coordinator when it is ensured the primary shard for the source db can&apos;t change.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2300669">SERVER-75431</key>
            <summary>Get rid or fix best effort check for primary db on rename path in sharded clusters</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="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Wed, 29 Mar 2023 08:55:04 +0000</created>
                <updated>Sun, 29 Oct 2023 21:24:04 +0000</updated>
                            <resolved>Wed, 29 Mar 2023 13:33:55 +0000</resolved>
                                    <version>5.0.15</version>
                    <version>7.0.0-rc0</version>
                    <version>6.0.5</version>
                    <version>6.3.0-rc2</version>
                                    <fixVersion>7.0.0-rc0</fixVersion>
                    <fixVersion>6.0.6</fixVersion>
                    <fixVersion>5.0.17</fixVersion>
                    <fixVersion>6.3.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5343934" author="xgen-internal-githook" created="Thu, 13 Apr 2023 11:46:24 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-75431&quot; title=&quot;Get rid or fix best effort check for primary db on rename path in sharded clusters&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-75431&quot;&gt;&lt;del&gt;SERVER-75431&lt;/del&gt;&lt;/a&gt; Get rid or fix best effort check for primary db on rename path in sharded clusters&lt;br/&gt;
Branch: v6.3&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cdbde83016a9236d91418fca00c70095841fde44&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cdbde83016a9236d91418fca00c70095841fde44&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5311544" author="xgen-internal-githook" created="Thu, 30 Mar 2023 11:18:44 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-75431&quot; title=&quot;Get rid or fix best effort check for primary db on rename path in sharded clusters&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-75431&quot;&gt;&lt;del&gt;SERVER-75431&lt;/del&gt;&lt;/a&gt; Get rid or fix best effort check for primary db on rename path in sharded clusters&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9d861c3e723e0444c78253f4193ae2c82dc39a15&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9d861c3e723e0444c78253f4193ae2c82dc39a15&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5311542" author="xgen-internal-githook" created="Thu, 30 Mar 2023 11:17:56 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-75431&quot; title=&quot;Get rid or fix best effort check for primary db on rename path in sharded clusters&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-75431&quot;&gt;&lt;del&gt;SERVER-75431&lt;/del&gt;&lt;/a&gt; Get rid or fix best effort check for primary db on rename path in sharded clusters&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/73674b526948ffb48bee0df0c0c1a73d70c04a38&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/73674b526948ffb48bee0df0c0c1a73d70c04a38&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5308919" author="xgen-internal-githook" created="Wed, 29 Mar 2023 13:32:52 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-75431&quot; title=&quot;Get rid or fix best effort check for primary db on rename path in sharded clusters&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-75431&quot;&gt;&lt;del&gt;SERVER-75431&lt;/del&gt;&lt;/a&gt; Get rid or fix best effort check for primary db on rename path in sharded clusters&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/276d4d7f6d34bc4c6763107d33a93a3deb2c567b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/276d4d7f6d34bc4c6763107d33a93a3deb2c567b&lt;/a&gt;&lt;/p&gt;</comment>
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