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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[CDRIVER-3475] Determine wire version and size limits from socket&apos;s ismaster, not server description</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-3475</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;Per &lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/server-discovery-and-monitoring/server-discovery-and-monitoring.rst#warning-about-the-maxwireversion-from-a-monitor-s-ismaster-response&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/blob/master/source/server-discovery-and-monitoring/server-discovery-and-monitoring.rst#warning-about-the-maxwireversion-from-a-monitor-s-ismaster-response&lt;/a&gt; drivers should determine the supported wire version, maxBsonObjectSize, maxMessageSizeBytes, and maxWriteBatchSize from the initial handshake on a socket.&lt;/p&gt;

&lt;p&gt;libmongoc does store these fields on &lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/blob/1.15.0/src/libmongoc/src/mongoc/mongoc-cluster-private.h/#L43-L54&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;a cluster node&lt;/a&gt;, but does not appear to use them when constructing the commands (even for the initial auth handshake). Instead, it uses the most recent server description from the topology, which may result in a race as described in the section of SDAM above.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1079883">CDRIVER-3475</key>
            <summary>Determine wire version and size limits from socket&apos;s ismaster, not server description</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="kevin.albertson@mongodb.com">Kevin Albertson</reporter>
                        <labels>
                    </labels>
                <created>Tue, 7 Jan 2020 22:14:35 +0000</created>
                <updated>Fri, 17 Sep 2021 01:48:10 +0000</updated>
                            <resolved>Fri, 17 Sep 2021 01:48:10 +0000</resolved>
                                                                    <component>auth</component>
                    <component>libmongoc</component>
                    <component>network</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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                            <issuelinktype id="10010">
                    <name>Duplicate</name>
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            <issuekey id="1341327">CDRIVER-3653</issuekey>
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