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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>
    </build-info>


<item>
            <title>[GODRIVER-3054] OP_QUERY isMaster used in load balancer mode</title>
                <link>https://jira.mongodb.org/browse/GODRIVER-3054</link>
                <project id="14289" key="GODRIVER">Go Driver</project>
                    <description>
&lt;h3&gt;&lt;a name=&quot;Context&quot;&gt;&lt;/a&gt;&lt;b&gt;Context&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;&lt;br/&gt;
We found in serverless tests that Go driver uses OP_QUERY with isMaster in load balancer mode. Howerver, &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;the spec&lt;/a&gt; says OP_MSG must be used.&lt;/font&gt;&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[2023/10/02 17:49:04.806] [ProxySession(60e60c6ccbd24f21a039c13a_,10673-drivers-testing-lb.2tzoa.mongodb-dev.net,3.236.71.14:54856).debug] [session_proxy.go:handleQueryMessage:498] got OP_QUERY isMaster&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[2023/10/02 17:49:04.806] [ProxySession(60e60c6ccbd24f21a039c13a_,10673-drivers-testing-lb.2tzoa.mongodb-dev.net,3.236.71.14:54856).info] [session_proxy.go:handleClientMetadata:407] received client metadata from 3.236.71.14:54856:{&quot;driver&quot;:{&quot;name&quot;:&quot;mongo-go-driver&quot;,&quot;version&quot;:&quot;v1.13.0-prerelease&quot;},&quot;os&quot;:{&quot;type&quot;:&quot;linux&quot;,&quot;architecture&quot;:&quot;amd64&quot;},&quot;platform&quot;:&quot;go1.20.8&quot;}&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;


&lt;h3&gt;&lt;a name=&quot;Definitionofdone&quot;&gt;&lt;/a&gt;&lt;b&gt;Definition of done&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;Hello commamnd with OP_MSG is used instead.&lt;/font&gt;&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;Pitfalls&quot;&gt;&lt;/a&gt;&lt;b&gt;Pitfalls&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;What should the implementer watch out for?  What are the risks?&lt;/font&gt;&lt;/p&gt;

</description>
                <environment></environment>
        <key id="2506749">GODRIVER-3054</key>
            <summary>OP_QUERY isMaster used in load balancer mode</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="preston.vasquez@mongodb.com">Preston Vasquez</assignee>
                                    <reporter username="siyuan.zhou@mongodb.com">Siyuan Zhou</reporter>
                        <labels>
                    </labels>
                <created>Tue, 21 Nov 2023 20:48:16 +0000</created>
                <updated>Tue, 5 Dec 2023 18:57:45 +0000</updated>
                            <resolved>Mon, 4 Dec 2023 19:12:25 +0000</resolved>
                                    <version>1.13.0</version>
                                    <fixVersion>2.0.0</fixVersion>
                    <fixVersion>1.13.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5927333" author="xgen-internal-githook" created="Tue, 5 Dec 2023 18:57:45 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Preston Vasquez&apos;, &apos;email&apos;: &apos;prestonvasquez@icloud.com&apos;, &apos;username&apos;: &apos;prestonvasquez&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-3054&quot; title=&quot;OP_QUERY isMaster used in load balancer mode&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-3054&quot;&gt;&lt;del&gt;GODRIVER-3054&lt;/del&gt;&lt;/a&gt; Handshake connection should not use legacy for LB (#1482)&lt;br/&gt;
Branch: release/1.13&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/commit/09f6511ea732bd3e16319788e07475ce8fdd3682&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-go-driver/commit/09f6511ea732bd3e16319788e07475ce8fdd3682&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5924296" author="xgen-internal-githook" created="Mon, 4 Dec 2023 20:02:06 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Steven Silvester&apos;, &apos;email&apos;: &apos;steven.silvester@ieee.org&apos;, &apos;username&apos;: &apos;blink1073&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-3054&quot; title=&quot;OP_QUERY isMaster used in load balancer mode&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-3054&quot;&gt;&lt;del&gt;GODRIVER-3054&lt;/del&gt;&lt;/a&gt; &lt;span class=&quot;error&quot;&gt;&amp;#91;master&amp;#93;&lt;/span&gt; Handshake connection should not use legacy for LB (#1487)&lt;/p&gt;

&lt;p&gt;Co-authored-by: Preston Vasquez &amp;lt;prestonvasquez@icloud.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/commit/ec2153b31e833a8ab8d207068da785a0e93396dd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-go-driver/commit/ec2153b31e833a8ab8d207068da785a0e93396dd&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                    <name>Depends</name>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="2511429">DRIVERS-2783</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="2385672">GODRIVER-2892</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2411304">GODRIVER-2935</issuekey>
        </issuelink>
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2.  Would you like the user to see examples of the syntax and/or executable code and its output?&lt;br/&gt;
3.  Which versions of the driver/connector does this apply to?&lt;/p&gt;</customfieldvalue>

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