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    <title>MongoDB Jira</title>
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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-23551] $isolated updates and deletes should use WRITE_CONFLICT_RETRY_ONLY yield policy</title>
                <link>https://jira.mongodb.org/browse/SERVER-23551</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently they use YIELD_MANUAL which prevents automatic resuming after hitting a WCE. This causes the operation to start over from scratch, or report failure to the user in the case of a multi-update.&lt;/p&gt;</description>
                <environment></environment>
        <key id="277701">SERVER-23551</key>
            <summary>$isolated updates and deletes should use WRITE_CONFLICT_RETRY_ONLY yield policy</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>
                            <label>bkp</label>
                    </labels>
                <created>Tue, 5 Apr 2016 21:50:18 +0000</created>
                <updated>Wed, 4 Jan 2017 22:03:57 +0000</updated>
                            <resolved>Thu, 21 Apr 2016 23:20:58 +0000</resolved>
                                                    <fixVersion>3.3.5</fixVersion>
                                    <component>Write Ops</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1243237" author="xgen-internal-githook" created="Thu, 21 Apr 2016 23:15:01 +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-23551&quot; title=&quot;$isolated updates and deletes should use WRITE_CONFLICT_RETRY_ONLY yield policy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23551&quot;&gt;&lt;del&gt;SERVER-23551&lt;/del&gt;&lt;/a&gt; $isolated writes should use WRITE_CONFLICT_RETRY_ONLY&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b95db102cadf57661e53ae6aa81c4ab9a1254a16&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b95db102cadf57661e53ae6aa81c4ab9a1254a16&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1227725" author="rassi@10gen.com" created="Wed, 6 Apr 2016 16:00:45 +0000"  >&lt;p&gt;No.  The current behavior is not correct because the catch block for WriteConflictException for YIELD_MANUAL multi-updates/deletes is outside of the collection lock acquisition, which means that they release their exclusive collection lock on each WriteConflictException.  The proposed behavior is correct because the exclusive collection lock will be held for the length of the entire operation, even though the operation may be retried from the beginning when a WriteConflictException is encountered.&lt;/p&gt;</comment>
                            <comment id="1227009" author="schwerin" created="Wed, 6 Apr 2016 00:19:27 +0000"  >&lt;p&gt;Isn&apos;t the current behavior correct?&lt;/p&gt;

</comment>
                            <comment id="1226913" author="rassi@10gen.com" created="Tue, 5 Apr 2016 22:05:46 +0000"  >&lt;p&gt;Per discussion, in some cases this can cause reads to observe the intermediate state of an $isolated multi-delete, when the WiredTiger storage engine is being used and a WriteConflictException is thrown.&lt;/p&gt;</comment>
                            <comment id="1226900" author="redbeard0531" created="Tue, 5 Apr 2016 21:51:24 +0000"  >&lt;p&gt;I&apos;m taking this since it simplifies my work on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23128&quot; title=&quot;Refactor write cmd path&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23128&quot;&gt;&lt;del&gt;SERVER-23128&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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