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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DRIVERS-2783] Test that LoadBalanced connection handshake uses OP_MSG</title>
                <link>https://jira.mongodb.org/browse/DRIVERS-2783</link>
                <project id="10980" key="DRIVERS">Drivers</project>
                    <description>&lt;div class=&quot;panel&quot; style=&quot;background-color: #fafbfc;border-color: #21313c;border-style: solid;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #fafbfc;&quot;&gt;
&lt;h3&gt;&lt;a name=&quot;Summary&quot;&gt;&lt;/a&gt;&lt;b&gt;Summary&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;Create a handshake prose test to ensure that the opcode used for a load balanced handshake is OP_MSG, per the specifications:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/load-balancers/load-balancers.rst#connection-establishment&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/blob/master/source/load-balancers/load-balancers.rst#connection-establishment&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/mongodb-handshake/handshake.rst#connection-handshake&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/blob/master/source/mongodb-handshake/handshake.rst#connection-handshake&lt;/a&gt;&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;Motivation&quot;&gt;&lt;/a&gt;&lt;b&gt;Motivation&lt;/b&gt;&lt;/h3&gt;

&lt;p&gt;The Go Driver has always incorrectly used OP_QUERY for load-balanced connection handshakes. The Drivers team should test for this case.&lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;Whoistheaffectedenduser%3F&quot;&gt;&lt;/a&gt;Who is the affected end user?&lt;/h4&gt;

&lt;p&gt;Affected end user is anyone connecting to the Atlas proxy (Serverless)&lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;Howdoesthisaffecttheenduser%3F&quot;&gt;&lt;/a&gt;How does this affect the end user?&lt;/h4&gt;

&lt;p&gt;Confusing log messages shown &lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;Howlikelyisitthatthisproblemorusecasewilloccur%3F&quot;&gt;&lt;/a&gt;How likely is it that this problem or use case will occur?&lt;/h4&gt;
&lt;p&gt;&lt;em&gt;Main path? Edge case?&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Iftheproblemdoesoccur%2Cwhataretheconsequencesandhowseverearethey%3F&quot;&gt;&lt;/a&gt;If the problem does occur, what are the consequences and how severe are they?&lt;/h4&gt;
&lt;p&gt;&lt;em&gt;Minor annoyance at a log message? Performance concern? Outage/unavailability? Failover can&apos;t complete?&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisissueurgent%3F&quot;&gt;&lt;/a&gt;Is this issue urgent?&lt;/h4&gt;
&lt;p&gt;&lt;em&gt;Does this ticket have a required timeline? What is it?&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisticketrequiredbyadownstreamteam%3F&quot;&gt;&lt;/a&gt;Is this ticket required by a downstream team?&lt;/h4&gt;
&lt;p&gt;&lt;em&gt;Needed by e.g. Atlas, Shell, Compass?&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisticketonlyfortests%3F&quot;&gt;&lt;/a&gt;Is this ticket only for tests?&lt;/h4&gt;
&lt;p&gt;Yes&lt;/p&gt;
&lt;h3&gt;&lt;a name=&quot;AcceptanceCriteria&quot;&gt;&lt;/a&gt;&lt;b&gt;Acceptance Criteria&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;Extend the handshake prose test to include:&lt;/p&gt;

&lt;p&gt;(1) If the server is load balanced, then ensure that the handshake uses the OP_MSG opcode&lt;br/&gt;
(2) If not, ensure the handshake uses OP_QUERY&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;</description>
                <environment></environment>
        <key id="2511429">DRIVERS-2783</key>
            <summary>Test that LoadBalanced connection handshake uses OP_MSG</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="preston.vasquez@mongodb.com">Preston Vasquez</reporter>
                        <labels>
                    </labels>
                <created>Wed, 29 Nov 2023 00:38:50 +0000</created>
                <updated>Tue, 5 Dec 2023 17:42:34 +0000</updated>
                                                                <component>Handshake</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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