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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
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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-17175] $isolated updates and deletes need X lock not IX</title>
                <link>https://jira.mongodb.org/browse/SERVER-17175</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="182522">SERVER-17175</key>
            <summary>$isolated updates and deletes need X lock not IX</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="9">Done</resolution>
                                        <assignee username="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                    </labels>
                <created>Wed, 4 Feb 2015 18:41:18 +0000</created>
                <updated>Fri, 18 Sep 2015 22:39:29 +0000</updated>
                            <resolved>Fri, 13 Feb 2015 22:35:17 +0000</resolved>
                                                    <fixVersion>3.0.0-rc9</fixVersion>
                    <fixVersion>3.1.0</fixVersion>
                                    <component>Concurrency</component>
                    <component>Write Ops</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="829618" author="xgen-internal-githook" created="Sun, 15 Feb 2015 15:30:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17175&quot; title=&quot;$isolated updates and deletes need X lock not IX&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17175&quot;&gt;&lt;del&gt;SERVER-17175&lt;/del&gt;&lt;/a&gt; Use X lock for $isolated updates and deletes&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 7286fb36c36daaa8ee4941fa5f6c225b0a25dc61)&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e71db695221e39b3b6aa972d7503ca8c52c8fd55&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e71db695221e39b3b6aa972d7503ca8c52c8fd55&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="829207" author="xgen-internal-githook" created="Fri, 13 Feb 2015 20:35:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17175&quot; title=&quot;$isolated updates and deletes need X lock not IX&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17175&quot;&gt;&lt;del&gt;SERVER-17175&lt;/del&gt;&lt;/a&gt; Use X lock for $isolated updates and deletes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7286fb36c36daaa8ee4941fa5f6c225b0a25dc61&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7286fb36c36daaa8ee4941fa5f6c225b0a25dc61&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="821533" author="redbeard0531" created="Wed, 4 Feb 2015 19:42:22 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=scotthernandez&quot; class=&quot;user-hover&quot; rel=&quot;scotthernandez&quot;&gt;scotthernandez&lt;/a&gt; For MMAPv1 and any other non-doc-locking engine, all IX locks on collections are already promoted to X so this would have no effect on them.&lt;/p&gt;</comment>
                            <comment id="821479" author="scotthernandez" created="Wed, 4 Feb 2015 18:57:30 +0000"  >&lt;p&gt;I&apos;m not sure this is need for mmapv1 since the yielding policy doesn&apos;t allow yielding once a document is written, and it already takes the collection lock. For docLevelLocking this does seem like an issue that needs to be addressed.&lt;/p&gt;</comment>
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