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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-29365] v3.2 no-op applyOps doesn&apos;t wait for majority writeConcern before returning.</title>
                <link>https://jira.mongodb.org/browse/SERVER-29365</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24630&quot; title=&quot;Mongos erroneously advances config optime for writes that fail write concern&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24630&quot;&gt;&lt;del&gt;SERVER-24630&lt;/del&gt;&lt;/a&gt; was introduced in v3.2.9 and made mongos/shard servers store the committed optime returned from commands to the config server, rather than the last seen optime.&lt;/p&gt;

&lt;p&gt;In the v3.2 shard applyOps command code we aren&apos;t properly waiting for majority write concern on no-ops / failures. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/0d051ed1a274d89c6916a76463c2ade416e20e32/src/mongo/db/commands/apply_ops.cpp#L125-L139&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This&lt;/a&gt; scope guard was wrapped around running applyOps on the server so that we would always update the last seen optime, regardless of applyOps results (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22933&quot; title=&quot;Update last opTime to latest after applyOps no-op&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22933&quot;&gt;&lt;del&gt;SERVER-22933&lt;/del&gt;&lt;/a&gt;). But in v3.2, the waitForWriteConcern is done &lt;a href=&quot;https://github.com/mongodb/mongo/blob/0d051ed1a274d89c6916a76463c2ade416e20e32/src/mongo/db/commands/apply_ops.cpp#L141-L147&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; in the same scope before the scope guard can fire. This wasn&apos;t a problem in v3.4 because the waitForWriteConcern code happened to get moved out of scope, so the scope guard is working correctly. The backport to v3.2, however, was not correct.&lt;/p&gt;</description>
                <environment></environment>
        <key id="386668">SERVER-29365</key>
            <summary>v3.2 no-op applyOps doesn&apos;t wait for majority writeConcern before returning.</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="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 May 2017 20:59:08 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:32 +0000</updated>
                            <resolved>Fri, 26 May 2017 17:26:45 +0000</resolved>
                                    <version>3.2.9</version>
                                    <fixVersion>3.2.14</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1581034" author="xgen-internal-githook" created="Fri, 26 May 2017 17:26:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;DiannaHohensee&apos;, u&apos;name&apos;: u&apos;Dianna Hohensee&apos;, u&apos;email&apos;: u&apos;dianna.hohensee@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29365&quot; title=&quot;v3.2 no-op applyOps doesn&amp;#39;t wait for majority writeConcern before returning.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29365&quot;&gt;&lt;del&gt;SERVER-29365&lt;/del&gt;&lt;/a&gt; make no-op applyOps wait for majority writeConcern before returning&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2f89263e637bca022ed9b8916e53637828d6f62e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2f89263e637bca022ed9b8916e53637828d6f62e&lt;/a&gt;&lt;/p&gt;</comment>
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