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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>
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<item>
            <title>[CDRIVER-4738] Do not resume after change stream cursor is closed</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-4738</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;h4&gt;&lt;a name=&quot;Summary&quot;&gt;&lt;/a&gt;Summary&lt;/h4&gt;

&lt;p&gt;Attempting to iterate a closed change stream results in the server error:&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;Attempting to resume a change stream using &apos;resumeAfter&apos; is not allowed from an invalidate notification.&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;Proposed Change: Do not attempt to resume the change stream. Return an error message indicating the change stream is closed.&lt;/p&gt;

&lt;p&gt;Consider: Compare behavior with other driver behavior when iterating a closed change stream cursor. Consider filing a DRIVERS ticket to specify a change stream must not attempt to resume after closed.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;HowtoReproduce&quot;&gt;&lt;/a&gt;How to Reproduce&lt;/h4&gt;

&lt;p&gt;This branch includes a failing test to reproduce the error: &lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/compare/master...kevinAlbs:mongo-c-driver:changestream&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/compare/master...kevinAlbs:mongo-c-driver:changestream&lt;/a&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;AdditionalBackground&quot;&gt;&lt;/a&gt;Additional Background&lt;/h4&gt;

&lt;p&gt;The server signals a change stream is closed by responding with a 0 cursor ID. Example:&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;{ &quot;cursor&quot; : { &quot;id&quot; : 0, &quot;ns&quot; : &quot;db.coll&quot;, &quot;nextBatch&quot; : [  ], &quot;postBatchResumeToken&quot; : { &quot;_data&quot; : &quot;826516E9230000000F2B042C0100296F5A1004A9D70E866B784600A7165560BE721BF2463C6F7065726174696F6E54797065003C64726F70000004&quot; } }, &quot;ok&quot; : 1.0, &quot;$clusterTime&quot; : { &quot;clusterTime&quot; : { &quot;$timestamp&quot; : { &quot;t&quot; : 1696000291, &quot;i&quot; : 23 } }, &quot;signature&quot; : { &quot;hash&quot; : { &quot;$binary&quot; : { &quot;base64&quot; : &quot;AAAAAAAAAAAAAAAAAAAAAAAAAAA=&quot;, &quot;subType&quot; : &quot;00&quot; } }, &quot;keyId&quot; : 0 } }, &quot;operationTime&quot; : { &quot;$timestamp&quot; : { &quot;t&quot; : 1696000291, &quot;i&quot; : 23 } } }&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;The C driver &lt;tt&gt;mongoc_cursor_t&lt;/tt&gt; returns this error when iterating a closed &lt;tt&gt;mongoc_cursor_t&lt;/tt&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;
		&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;Cannot advance a completed or failed cursor&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;The Go driver &lt;tt&gt;ChangeStream&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/blob/cd3c6996acf2db8eb02df0966fa6f76168ab1abf/mongo/change_stream.go#L664-L667&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;checks for a cursor ID of 0&lt;/a&gt;. returns &lt;tt&gt;false&lt;/tt&gt; to signal no events are returned, and does not attempt to resume or return an error.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2456046">CDRIVER-4738</key>
            <summary>Do not resume after change stream cursor is closed</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="kevin.albertson@mongodb.com">Kevin Albertson</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Mon, 2 Oct 2023 15:59:35 +0000</created>
                <updated>Mon, 2 Oct 2023 19:12:30 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                    <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="2454917">DRIVERS-2739</issuekey>
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