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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-31982] Shard does not call config commit chunk migration command with majority writeConcern nor checks for writeConcern errors.</title>
                <link>https://jira.mongodb.org/browse/SERVER-31982</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;From visual inspection of the code, MigrationSourceManager::commitChunkMetadataOnConfig does not check the command response for writeConcernStatus, nor does it send majority write concern in the command.&lt;/p&gt;

&lt;p&gt;On the config server, ShardingCatalogManager::commitChunkMigration does not appear to include majority write concern in its final write. This was probably because we used to take a lock twice to nest and prevent yielding, which makes yielding to wait for replication impossible, in order to enforce serialization of commits. Now, however, we use a _kChunkOpLock to serialize operations, no longer taking locks. These kind of comments should also be removed: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e37db69674486dff9fdac2b5ee41961a8805804b/src/mongo/s/catalog/sharding_catalog_manager_chunk_operations.cpp#L223-L225&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/e37db69674486dff9fdac2b5ee41961a8805804b/src/mongo/s/catalog/sharding_catalog_manager_chunk_operations.cpp#L223-L225&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="459202">SERVER-31982</key>
            <summary>Shard does not call config commit chunk migration command with majority writeConcern nor checks for writeConcern errors.</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, 15 Nov 2017 17:24:49 +0000</created>
                <updated>Mon, 30 Oct 2023 23:10:30 +0000</updated>
                            <resolved>Thu, 14 Dec 2017 19:07:25 +0000</resolved>
                                                    <fixVersion>3.4.11</fixVersion>
                    <fixVersion>3.6.2</fixVersion>
                    <fixVersion>3.7.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1763119" author="xgen-internal-githook" created="Tue, 2 Jan 2018 18:29:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;, &apos;email&apos;: &apos;dianna.hohensee@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31982&quot; title=&quot;Shard does not call config commit chunk migration command with majority writeConcern nor checks for writeConcern errors.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31982&quot;&gt;&lt;del&gt;SERVER-31982&lt;/del&gt;&lt;/a&gt; check for write concern errors in migration commit response&lt;/p&gt;

&lt;p&gt;(cherry picked from commit f4c11f679de3781ae202511fe07144e357c80e2b)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/58a352348fb8f284ca1dc33378ecef69c34a6366&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/58a352348fb8f284ca1dc33378ecef69c34a6366&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1753292" author="xgen-internal-githook" created="Fri, 15 Dec 2017 18:53:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;email&apos;: &apos;dianna.hohensee@10gen.com&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31982&quot; title=&quot;Shard does not call config commit chunk migration command with majority writeConcern nor checks for writeConcern errors.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31982&quot;&gt;&lt;del&gt;SERVER-31982&lt;/del&gt;&lt;/a&gt; check for write concern errors in migration commit response&lt;/p&gt;

&lt;p&gt;(cherry picked from commit f4c11f679de3781ae202511fe07144e357c80e2b)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a8493bd450bdeab9847991d9e88b6b35b3b81bac&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a8493bd450bdeab9847991d9e88b6b35b3b81bac&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1752272" author="xgen-internal-githook" created="Thu, 14 Dec 2017 19:07:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;email&apos;: &apos;dianna.hohensee@10gen.com&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31982&quot; title=&quot;Shard does not call config commit chunk migration command with majority writeConcern nor checks for writeConcern errors.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31982&quot;&gt;&lt;del&gt;SERVER-31982&lt;/del&gt;&lt;/a&gt; check for write concern errors in migration commit response&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f4c11f679de3781ae202511fe07144e357c80e2b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f4c11f679de3781ae202511fe07144e357c80e2b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1726755" author="kaloian.manassiev" created="Wed, 15 Nov 2017 18:36:07 +0000"  >&lt;p&gt;You are right, this has existed since &lt;a href=&quot;https://github.com/mongodb/mongo/blob/54021ac0673ebab43c7579db0958f6fe3e70432b/src/mongo/db/s/config/configsvr_commit_chunk_migration_command.cpp&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;day 1&lt;/a&gt;. We should definitely fix it and backport to 3.4.&lt;/p&gt;

&lt;p&gt;On other note, this is not as serious bug as it sounds, because all metadata reads are done with majority read concern and &quot;afterOpTime&quot;, so they will never read uncommitted data (including the balancer reads itself).&lt;/p&gt;</comment>
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