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    <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>
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<item>
            <title>[SERVER-66808] Remove undocumented fields from the change stream error</title>
                <link>https://jira.mongodb.org/browse/SERVER-66808</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When change stream errors because pre-image is not available it returns `preImageId` and `rawOplogUpdateSpec`.&lt;/p&gt;

&lt;p&gt;Open a change stream with pre or post image required on a collection that doesn&apos;t have pre-images enabled&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;
		&lt;tbody &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-top: 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;watch = db.col.aggregate([{ $changeStream: { fullDocument: &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;required&quot;&lt;/span&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;} }]) &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;Make an update to collection&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;
		&lt;tbody &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-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;db.col.insertOne({a:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1&lt;/span&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;})&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;db.col.updateOne({}, {$set: {a:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2&lt;/span&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;}})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;Read the change stream&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;
		&lt;tbody &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-top: 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;watch.tryNext() &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;For update event it produces an error like this if you requested post-image:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;MongoServerError: Executor error during getMore :: caused by :: Change stream was configured to require a post-image for all update, delete and replace events, but the post-image was not found for event: {rawOplogUpdateSpec: {$v: 2, diff: {u: {a: 2}}}, _id: {_data: &quot;82628FB979000000012B022C0100296E5A1004EC71121BA6E44B5D97FB01ED73D7A21046645F69640064628FB966D440719E7C9887A00004&quot;}, operationType: &quot;update&quot;, clusterTime: Timestamp(1653586297, 1), wallTime: 2022-05-26T17:31:37.351Z, preImageId: {nsUUID: BinData(4, &quot;EC71121BA6E44B5D97FB01ED73D7A210&quot;), ts: Timestamp(1653586297, 1), applyOpsIndex: 0}, ns: {db: &quot;test&quot;, coll: &quot;col&quot;}, documentKey: {_id: 628fb966d440719e7c9887a0}, updateDescription: {updatedFields: {a: 2}, removedFields: [], truncatedArrays: []}}&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;Or like this if pre-image was requested:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;MongoServerError: Executor error during getMore :: caused by :: Change stream was configured to require a pre-image for all update, delete and replace events, but the pre-image was not found for event: {rawOplogUpdateSpec: {$v: 2, diff: {u: {a: 2}}}, _id: {_data: &quot;82628FB90E000000012B022C0100296E5A1004E544309D04C54ACDA8D747782D1ADB5446645F69640064628FB908D440719E7C98879F0004&quot;}, operationType: &quot;update&quot;, clusterTime: Timestamp(1653586190, 1), wallTime: 2022-05-26T17:29:50.395Z, preImageId: {nsUUID: BinData(4, &quot;E544309D04C54ACDA8D747782D1ADB54&quot;), ts: Timestamp(1653586190, 1), applyOpsIndex: 0}, ns: {db: &quot;test&quot;, coll: &quot;col&quot;}, documentKey: {_id: 628fb908d440719e7c98879f}, updateDescription: {updatedFields: {a: 2}, removedFields: [], truncatedArrays: []}}&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2056087">SERVER-66808</key>
            <summary>Remove undocumented fields from the change stream error</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="catalin.sumanaru@mongodb.com">Catalin Sumanaru</assignee>
                                    <reporter username="kateryna.kamenieva@mongodb.com">Katya Kamenieva</reporter>
                        <labels>
                    </labels>
                <created>Thu, 26 May 2022 17:38:25 +0000</created>
                <updated>Sun, 29 Oct 2023 21:37:40 +0000</updated>
                            <resolved>Wed, 6 Jul 2022 12:54:34 +0000</resolved>
                                    <version>6.0.0-rc7</version>
                                    <fixVersion>6.0.1</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                    <component>Change streams</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4701246" author="xgen-internal-githook" created="Mon, 25 Jul 2022 10:17:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;csum112&apos;, &apos;email&apos;: &apos;catalin.sumanaru@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66808&quot; title=&quot;Remove undocumented fields from the change stream error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66808&quot;&gt;&lt;del&gt;SERVER-66808&lt;/del&gt;&lt;/a&gt; Remove undocumented fields from the change stream error&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/83caa2a5ec49ef1617859461e93b46331c09033a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/83caa2a5ec49ef1617859461e93b46331c09033a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4657234" author="xgen-internal-githook" created="Tue, 5 Jul 2022 13:50:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;csum112&apos;, &apos;email&apos;: &apos;catalin.sumanaru@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66808&quot; title=&quot;Remove undocumented fields from the change stream error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66808&quot;&gt;&lt;del&gt;SERVER-66808&lt;/del&gt;&lt;/a&gt; Remove undocumented fields from the change stream error&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/91a4179916a8627f8e492a2a6e26dc4679033842&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/91a4179916a8627f8e492a2a6e26dc4679033842&lt;/a&gt;&lt;/p&gt;</comment>
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