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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-13013] write command overhead too large for large batch sizes</title>
                <link>https://jira.mongodb.org/browse/SERVER-13013</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The spec says that drivers should only consider the &quot;body&quot; when sizing batches. For example, that means that for {delete: &apos;db.collection&apos;, deletes: [{q:{query: 1}, limit:0}]}}} only the size of {query: 1} counts to the size of the batch. The problem is that if you do 1000 (max ops per batch) deletes in a batch, the overhead that doesn&apos;t count for max batch size adds up to more than the difference between 16MB and BSONObjMaxInternalSize. This leads to an assert on the server for what is specified to be a valid operation. The assert is in a place that the server decides that there is irreparable network corruption and closes the connection.&lt;/p&gt;

&lt;p&gt;I spoke with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=greg_10gen&quot; class=&quot;user-hover&quot; rel=&quot;greg_10gen&quot;&gt;greg_10gen&lt;/a&gt; and we think the best solution would be to change the write-commands spec to say that either the entire command object with all overhead must fit under 16MB or it must only have a single op in the operations array. &lt;/p&gt;</description>
                <environment></environment>
        <key id="117062">SERVER-13013</key>
            <summary>write command overhead too large for large batch sizes</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="1" iconUrl="https://jira.mongodb.org/images/icons/priorities/blocker.svg">Blocker - P1</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="9">Done</resolution>
                                        <assignee username="greg_10gen">Greg Studer</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                            <label>26qa</label>
                    </labels>
                <created>Mon, 3 Mar 2014 22:55:59 +0000</created>
                <updated>Mon, 11 Jul 2016 17:19:20 +0000</updated>
                            <resolved>Mon, 10 Mar 2014 21:32:05 +0000</resolved>
                                    <version>2.6.0-rc0</version>
                                    <fixVersion>2.6.0-rc2</fixVersion>
                                    <component>Write Ops</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="511920" author="xgen-internal-githook" created="Fri, 7 Mar 2014 23:03:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-13013&quot; title=&quot;write command overhead too large for large batch sizes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-13013&quot;&gt;&lt;del&gt;SERVER-13013&lt;/del&gt;&lt;/a&gt; Raise js-&amp;gt;bson size limit to BSONObjMaxInternalSize&lt;/p&gt;

&lt;p&gt;This is to allow write commands that include objects with BSONObjMaxUserSize.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7240d05b07aebe766a9490a31459c6112620a6f6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7240d05b07aebe766a9490a31459c6112620a6f6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="510045" author="greg_10gen" created="Wed, 5 Mar 2014 18:33:11 +0000"  >&lt;p&gt;The shell also needs to change here and use the new size check.&lt;/p&gt;</comment>
                            <comment id="509341" author="greg_10gen" created="Tue, 4 Mar 2014 20:43:57 +0000"  >&lt;p&gt;Confusingly, the bulk api spec says something different that results in this not being a problem - each batch is sized until it hits 16MB + some overhead and then a new batch is broken off:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/specifications/blob/master/source/driver-fluent-api.rst&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/specifications/blob/master/source/driver-fluent-api.rst&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Proposing a code review that fixes the write command spec to more closely match the fluent spec.&lt;/p&gt;</comment>
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            <issuekey id="119903">SERVER-13180</issuekey>
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