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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>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-31892] moveChunk with `waitForDelete` doesn&apos;t wait for majority write concern</title>
                <link>https://jira.mongodb.org/browse/SERVER-31892</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This leads to the problem described in detail in BF-6920.&lt;/p&gt;

&lt;p&gt;I propose simply adding a waitForWriteConcern to moveChunk before the scoped registered migration object goes out of scope.&lt;/p&gt;</description>
                <environment></environment>
        <key id="456726">SERVER-31892</key>
            <summary>moveChunk with `waitForDelete` doesn&apos;t wait for majority write concern</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="janna.golden@mongodb.com">Janna Golden</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Thu, 9 Nov 2017 15:52:00 +0000</created>
                <updated>Mon, 30 Oct 2023 23:10:40 +0000</updated>
                            <resolved>Tue, 18 Sep 2018 14:37:25 +0000</resolved>
                                                    <fixVersion>3.6.9</fixVersion>
                    <fixVersion>4.0.4</fixVersion>
                    <fixVersion>4.1.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="2027055" author="xgen-internal-githook" created="Mon, 8 Oct 2018 19:55:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;jannaerin&apos;, &apos;email&apos;: &apos;golden.janna@gmail.com&apos;, &apos;username&apos;: &apos;jannaerin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31892&quot; title=&quot;moveChunk with `waitForDelete` doesn&amp;#39;t wait for majority write concern&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31892&quot;&gt;&lt;del&gt;SERVER-31892&lt;/del&gt;&lt;/a&gt; moveChunk with  should wait for majority write concern&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 07ecc05d44c2a4f443bccf96004a1da16b2e3984)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/05641d1216ffe2b0b0612863b5380d608eb74532&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/05641d1216ffe2b0b0612863b5380d608eb74532&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2026947" author="xgen-internal-githook" created="Mon, 8 Oct 2018 18:41:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;jannaerin&apos;, &apos;email&apos;: &apos;golden.janna@gmail.com&apos;, &apos;username&apos;: &apos;jannaerin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31892&quot; title=&quot;moveChunk with `waitForDelete` doesn&amp;#39;t wait for majority write concern&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31892&quot;&gt;&lt;del&gt;SERVER-31892&lt;/del&gt;&lt;/a&gt; moveChunk with  should wait for majority write concern&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 07ecc05d44c2a4f443bccf96004a1da16b2e3984)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d6e59053689e3822c666046ce96cf68451688230&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d6e59053689e3822c666046ce96cf68451688230&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2006455" author="xgen-internal-githook" created="Tue, 18 Sep 2018 14:22:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;jannaerin&apos;, &apos;email&apos;: &apos;golden.janna@gmail.com&apos;, &apos;username&apos;: &apos;jannaerin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31892&quot; title=&quot;moveChunk with `waitForDelete` doesn&amp;#39;t wait for majority write concern&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31892&quot;&gt;&lt;del&gt;SERVER-31892&lt;/del&gt;&lt;/a&gt; moveChunk with  should wait for majority write concern&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/07ecc05d44c2a4f443bccf96004a1da16b2e3984&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/07ecc05d44c2a4f443bccf96004a1da16b2e3984&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1721721" author="kaloian.manassiev" created="Thu, 9 Nov 2017 17:27:30 +0000"  >&lt;p&gt;I guess this is a reasonable solution, given that &lt;tt&gt;waitForDelete&lt;/tt&gt; is mostly used for testing. I still like having the range deleter taking checkpoints from time to time in order to not interfere with the ongoing load and also as a sanity-checking.&lt;/p&gt;</comment>
                            <comment id="1721594" author="dianna.hohensee" created="Thu, 9 Nov 2017 16:10:25 +0000"  >&lt;p&gt;We could place the waitForWriteConcern inside the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f19da233faba9a42b7fbe84b38df7bb7f1a9e496/src/mongo/db/s/move_chunk_command.cpp#L166-L174&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;waitForDelete check&lt;/a&gt; &amp;#8211; would this resolve such issues?&lt;/p&gt;</comment>
                            <comment id="1721584" author="kaloian.manassiev" created="Thu, 9 Nov 2017 16:02:02 +0000"  >&lt;p&gt;I don&apos;t think we should force &lt;tt&gt;moveChunk&lt;/tt&gt; to always perform a majority write concern. We have had customers complain about this impacting the rate of migration out of overloaded shards.&lt;/p&gt;

&lt;p&gt;Instead, we should make the range deleter wait for a majority write concern when it finishes a range to be deleted &lt;a href=&quot;https://github.com/mongodb/mongo/blob/54a3f40dcfbff57f46859ba0b88249e6008597ea/src/mongo/db/s/collection_range_deleter.cpp#L217&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Ideally, this wait should only happen if this is an outgoing migration, but not when the range deleter is used to clean space for incoming migration.&lt;/p&gt;</comment>
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