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    <title>MongoDB Jira</title>
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    <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-72473] Error about $_internalChangeStreamOplogMatch when trying to use $changeStream in a pipeline</title>
                <link>https://jira.mongodb.org/browse/SERVER-72473</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I&apos;m trying to watch a collection, but whenever $changeStream is part of the pipeline, I get the following error:&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Command failed (Location40602): $_internalChangeStreamOplogMatch is only valid as the first stage in a pipeline&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;It doesn&apos;t matter what I set &lt;tt&gt;$changeStream&lt;/tt&gt; to, or if it&apos;s alone or with other stages in the pipeline, I always get this error. I tried both with Rust and Node.js and I get the same error. This is the Rust code I&apos;m using:&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;let stream_pipeline = Some(doc! {&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;&#160; &#160; &quot;$changeStream&quot; : {&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;&#160; &#160; &#160; &#160; &quot;fullDocument&quot;: &quot;updateLookup&quot;&lt;/tt&gt;&lt;br/&gt;
{{&#160; &#160; }}}&lt;br/&gt;
&lt;tt&gt;});&lt;/tt&gt;&lt;br/&gt;
{{}}&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;let stream = collection.watch(stream_pipeline, None).await?;&lt;/tt&gt;{&lt;tt&gt;}&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;I&apos;m using the &quot;mongodb&quot; 2.3.1 crate, Rust 1.66.0, MongoDB server 6.0.3, on macOS 13.1, Apple M1 Pro CPU. For Node.js I used the &quot;mongodb&quot; 4.13.0 package with Node.js 16.14.2.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2222632">SERVER-72473</key>
            <summary>Error about $_internalChangeStreamOplogMatch when trying to use $changeStream in a pipeline</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="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="radu.dineiu@gmail.com">Radu D</reporter>
                        <labels>
                            <label>changestreams</label>
                    </labels>
                <created>Tue, 3 Jan 2023 12:36:33 +0000</created>
                <updated>Wed, 4 Jan 2023 01:31:29 +0000</updated>
                            <resolved>Wed, 4 Jan 2023 01:12:56 +0000</resolved>
                                    <version>6.0.3</version>
                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5088725" author="JIRAUSER1270794" created="Wed, 4 Jan 2023 01:11:08 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=radu.dineiu%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;radu.dineiu@gmail.com&quot;&gt;radu.dineiu@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for following up and I&apos;m glad to hear your problem has been resolved! I&apos;m closing this ticket.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Yuan&lt;/p&gt;</comment>
                            <comment id="5088631" author="JIRAUSER1272444" created="Tue, 3 Jan 2023 23:38:00 +0000"  >&lt;p&gt;I didn&apos;t use this correctly. If I use fullDocument: updateLookup as an option to watch(), it works as expected.&lt;/p&gt;</comment>
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