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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-42646] Cap splitVector response at max BSONObj size</title>
                <link>https://jira.mongodb.org/browse/SERVER-42646</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The splitVector command will scan a chunk for shard key values to split a chunk at and return an array of chosen points. Currently it is possible for the size of the chosen points to make the response exceed the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9a58f3aaad/src/mongo/bson/util/builder.h#L72&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;max BSONObj size limit of 16MB&lt;/a&gt;, leading splitVector to fail with &lt;tt&gt;BSONObjectTooLarge&lt;/tt&gt;. When the shard key size limit is removed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42368&quot; title=&quot;Remove max shard key value size limit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42368&quot;&gt;&lt;del&gt;SERVER-42368&lt;/del&gt;&lt;/a&gt;, this will become more likely, so splitVector should be modified to stop selecting split points when they would push the response over the BSON size limit and return the already chosen points. If possible, splitVector should return at least one split point.&lt;/p&gt;</description>
                <environment></environment>
        <key id="885302">SERVER-42646</key>
            <summary>Cap splitVector response at max BSONObj size</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="blake.oler@mongodb.com">Blake Oler</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Tue, 6 Aug 2019 16:26:22 +0000</created>
                <updated>Sun, 29 Oct 2023 22:18:21 +0000</updated>
                            <resolved>Tue, 20 Aug 2019 14:39:14 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2378960" author="xgen-internal-githook" created="Tue, 20 Aug 2019 14:34:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Blake Oler&apos;, &apos;email&apos;: &apos;blake.oler@mongodb.com&apos;, &apos;username&apos;: &apos;BlakeIsBlake&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42646&quot; title=&quot;Cap splitVector response at max BSONObj size&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42646&quot;&gt;&lt;del&gt;SERVER-42646&lt;/del&gt;&lt;/a&gt; Cap splitVector response at max BSONObj size&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/73567b08e52e490d2e47603796fde950f9032eab&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/73567b08e52e490d2e47603796fde950f9032eab&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is documented by">
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            <issuekey id="901106">DOCS-12970</issuekey>
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            <issuekey id="540556">SERVER-34877</issuekey>
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            <issuekey id="872375">SERVER-42368</issuekey>
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                            <customfieldvalue>The splitVector command (which is used when splitting a chunk) will now stop selecting split points when the number of split points has reached the maximum BSONObj size limit. Previously, it was possible for the size of the chosen points to exceed said limit, and then the splitVector command would fail with {{BSONObjectTooLarge}}.</customfieldvalue>

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