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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-59806] Optimized path of shard collection fails to succeed with a large number of chunks</title>
                <link>https://jira.mongodb.org/browse/SERVER-59806</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When sharding an empty collection, it is possible to pre-split the chunks across the cluster depending on the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/71bcac7695c5520e6d2d1ec7a9e11e98d58813f5/src/mongo/db/s/create_collection_coordinator.cpp#L683&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;split policy&lt;/a&gt; initially associated with the collection. For example, if the shard key is hashed and an initial number of chunks is specified (using the &lt;a href=&quot;https://docs.mongodb.com/manual/reference/command/shardCollection/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;numInitialChunks&lt;/a&gt; parameter) then the chunks will be equally distributed among the shards in the cluster automatically, given that the collection is empty.&lt;/p&gt;

&lt;p&gt;When committing the chunks to the config server, an &lt;a href=&quot;https://github.com/mongodb/mongo/blob/71bcac7695c5520e6d2d1ec7a9e11e98d58813f5/src/mongo/db/s/create_collection_coordinator.cpp#L770&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;upsert&lt;/a&gt; is used, this works fine for a small number of chunks (for example a thousand) but, with a large enough number, it is making one node on the config server to crash. The upsert operation could be replaced by an insert, but then the limitation will be the size of the BSONObj on the command.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1868015">SERVER-59806</key>
            <summary>Optimized path of shard collection fails to succeed with a large number of chunks</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="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</assignee>
                                    <reporter username="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</reporter>
                        <labels>
                    </labels>
                <created>Mon, 6 Sep 2021 15:56:31 +0000</created>
                <updated>Sun, 29 Oct 2023 21:48:51 +0000</updated>
                            <resolved>Wed, 10 Nov 2021 09:41:43 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                    <fixVersion>5.0.5</fixVersion>
                    <fixVersion>5.1.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4188647" author="xgen-internal-githook" created="Mon, 15 Nov 2021 13:36:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jose Grillo Ramirez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59806&quot; title=&quot;Optimized path of shard collection fails to succeed with a large number of chunks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59806&quot;&gt;&lt;del&gt;SERVER-59806&lt;/del&gt;&lt;/a&gt; Change upsert for insert when writing chunks in create sharded collection path&lt;/p&gt;

&lt;p&gt;(cherry picked from commit bdc2e9b2ed299f4dfbf6183eed94707afbde8478)&lt;br/&gt;
Branch: v5.1&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/52e6fb7e647fbad710ec78bd641e0074a4b895a5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/52e6fb7e647fbad710ec78bd641e0074a4b895a5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4188600" author="xgen-internal-githook" created="Mon, 15 Nov 2021 13:11:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jose Grillo Ramirez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59806&quot; title=&quot;Optimized path of shard collection fails to succeed with a large number of chunks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59806&quot;&gt;&lt;del&gt;SERVER-59806&lt;/del&gt;&lt;/a&gt; Change upsert for insert when writing chunks in create sharded collection path&lt;/p&gt;

&lt;p&gt;(cherry picked from commit bdc2e9b2ed299f4dfbf6183eed94707afbde8478)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4da342b293978544e1f17da5dcccb47211c298bb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4da342b293978544e1f17da5dcccb47211c298bb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4179783" author="xgen-internal-githook" created="Wed, 10 Nov 2021 09:36:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jose Grillo Ramirez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59806&quot; title=&quot;Optimized path of shard collection fails to succeed with a large number of chunks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59806&quot;&gt;&lt;del&gt;SERVER-59806&lt;/del&gt;&lt;/a&gt; Change upsert for insert when writing chunks in create sharded collection path&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bdc2e9b2ed299f4dfbf6183eed94707afbde8478&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bdc2e9b2ed299f4dfbf6183eed94707afbde8478&lt;/a&gt;&lt;/p&gt;</comment>
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