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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-38467] renameCollection across databases should not require an uninterruptible database X lock while cleaning up temp collections</title>
                <link>https://jira.mongodb.org/browse/SERVER-38467</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Rename collection across databases creates temporary collections and, in the case of an error, drops these temporary collections. Dropping temporary collections acquires a Database X lock in a destructor which must succeed. If this thread is the only accessor of the temporary collections, there is no need to take such a strong lock.&lt;/p&gt;</description>
                <environment></environment>
        <key id="647667">SERVER-38467</key>
            <summary>renameCollection across databases should not require an uninterruptible database X lock while cleaning up temp collections</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="louis.williams@mongodb.com">Louis Williams</reporter>
                        <labels>
                            <label>prepare_interruptibility</label>
                            <label>uninterruptibleLockGuardRemoval</label>
                    </labels>
                <created>Fri, 7 Dec 2018 20:51:45 +0000</created>
                <updated>Sun, 29 Oct 2023 22:26:00 +0000</updated>
                            <resolved>Tue, 18 Dec 2018 18:51:43 +0000</resolved>
                                                    <fixVersion>4.1.7</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2094745" author="xgen-internal-githook" created="Tue, 18 Dec 2018 18:50:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;milkie&apos;, &apos;email&apos;: &apos;milkie@10gen.com&apos;, &apos;name&apos;: &apos;Eric Milkie&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38467&quot; title=&quot;renameCollection across databases should not require an uninterruptible database X lock while cleaning up temp collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38467&quot;&gt;&lt;del&gt;SERVER-38467&lt;/del&gt;&lt;/a&gt; do not block interruption when cleaning up temp collection from rename&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/687969575ce7876ffcbcccd8b4453463719060c6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/687969575ce7876ffcbcccd8b4453463719060c6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2087624" author="milkie" created="Tue, 11 Dec 2018 21:15:44 +0000"  >&lt;p&gt;Perhaps the simplest solution is to simply make the temp table cleanup interruptible.  We can clear the kill flag first before cleaning up, in order to reset the interrupt state.  If the operation again gets interrupted (an unlikely scenario), we will simply leave the temp table alone, and it will get automatically cleaned up at the next server restart or stepup.&lt;/p&gt;</comment>
                            <comment id="2087623" author="milkie" created="Tue, 11 Dec 2018 21:13:55 +0000"  >&lt;p&gt;Actually, a strong lock is still required to drop any Collection in the catalog, since there is always the chance that a listCollections command is scanning the Collections and extracting their string names.&lt;br/&gt;
I am going to brainstorm some other solutions to this problem.&lt;/p&gt;</comment>
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