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    <link>https://jira.mongodb.org</link>
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    <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-49220] failCommand with appName does not fail connection handshake command</title>
                <link>https://jira.mongodb.org/browse/SERVER-49220</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It look like after the changes in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48985&quot; title=&quot;Add logging for failCommand&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48985&quot;&gt;&lt;del&gt;SERVER-48985&lt;/del&gt;&lt;/a&gt; (4.4.0-rc11-9-gee10647) the behavior of failCommand has changed slightly. It&apos;s no longer possible to fail the &lt;em&gt;initial&lt;/em&gt; connection handshake and specify an appName filter. For example, the following failpoint on 4.4.0-rc11 will trigger on the connection handshake, now it only triggers on &lt;em&gt;subsequent&lt;/em&gt; isMaster commands:&lt;/p&gt;
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&lt;p/&gt;

&lt;p&gt;Is this the same issue described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48985&quot; title=&quot;Add logging for failCommand&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48985&quot;&gt;&lt;del&gt;SERVER-48985&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49157&quot; title=&quot;Initialize WireSpec during MONGO_INITIALIZER&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49157&quot;&gt;&lt;del&gt;SERVER-49157&lt;/del&gt;&lt;/a&gt;?&lt;/p&gt;

&lt;p&gt;CC: &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ben.caimano&quot; class=&quot;user-hover&quot; rel=&quot;ben.caimano&quot;&gt;ben.caimano&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1397346">SERVER-49220</key>
            <summary>failCommand with appName does not fail connection handshake command</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="ben.caimano@mongodb.com">Benjamin Caimano</assignee>
                                    <reporter username="shane.harvey@mongodb.com">Shane Harvey</reporter>
                        <labels>
                            <label>sa-groomed</label>
                    </labels>
                <created>Wed, 1 Jul 2020 00:16:56 +0000</created>
                <updated>Tue, 20 Oct 2020 19:11:53 +0000</updated>
                            <resolved>Tue, 20 Oct 2020 19:11:53 +0000</resolved>
                                    <version>4.4.0-rc12</version>
                                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="3454992" author="ben.caimano" created="Tue, 20 Oct 2020 19:11:53 +0000"  >&lt;p&gt;I believe we have addressed the issue via &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49336&quot; title=&quot;Set client metadata if it is missing during failCommand&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49336&quot;&gt;&lt;del&gt;SERVER-49336&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="3269150" author="ben.caimano" created="Thu, 2 Jul 2020 20:22:00 +0000"  >&lt;p&gt;Potentially, yes. It depends on how intrusive the bug fix is. &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48985&quot; title=&quot;Add logging for failCommand&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48985&quot;&gt;&lt;del&gt;SERVER-48985&lt;/del&gt;&lt;/a&gt; was only a failure in our testing code. My suspicion is that this behavior is about how we process metadata for OP_QUERY in general.&lt;/p&gt;</comment>
                            <comment id="3269099" author="shane.harvey" created="Thu, 2 Jul 2020 19:54:06 +0000"  >&lt;p&gt;Is this something that can be fixed for 4.4?&lt;/p&gt;</comment>
                            <comment id="3266425" author="shane.harvey" created="Wed, 1 Jul 2020 21:03:28 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=divjot.arora&quot; class=&quot;user-hover&quot; rel=&quot;divjot.arora&quot;&gt;divjot.arora&lt;/a&gt; has pointed out that the following spec tests no longer work as designed (because the server does not fail the initial handshake):&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/specifications/blob/f123e3a/source/server-discovery-and-monitoring/tests/integration/isMaster-timeout.yml#L12&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Network timeout on Monitor handshake&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/specifications/blob/f123e3a/source/server-discovery-and-monitoring/tests/integration/isMaster-command-error.yml#L12&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Command error on Monitor handshake&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;It would be great to get this bug fixed so that we can regain test coverage for failed handshake commands.&lt;/p&gt;</comment>
                            <comment id="3266301" author="shane.harvey" created="Wed, 1 Jul 2020 20:49:08 +0000"  >&lt;p&gt;I believe this is only affecting a few Python specific tests and not all drivers so I don&apos;t think this is a blocker. I can workaround this issue in pymongo&apos;s test suite for the time being by removing the appName filter. Still, it would be great to get a fix sooner rather than later.&lt;/p&gt;</comment>
                            <comment id="3263143" author="ben.caimano" created="Wed, 1 Jul 2020 16:46:18 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=shane.harvey&quot; class=&quot;user-hover&quot; rel=&quot;shane.harvey&quot;&gt;shane.harvey&lt;/a&gt;, that is interesting. My first guess is that we are not properly reading the appName from OP_QUERY requests. Before, we would have failed the command because the appName was considered empty. Now, it doesn&apos;t match the filter so it isn&apos;t failed. &lt;/p&gt;

&lt;p&gt;How heavily is this affecting the drivers team?&lt;/p&gt;</comment>
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