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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-49349] ChangeStreams cannot resume from CursorNotFound errors in MongoDB 4.4</title>
                <link>https://jira.mongodb.org/browse/SERVER-49349</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Starting with MongoDB 4.4, drivers use the updated change stream specification (DRIVERS-907) to determine whether an error encountered while iterating a change stream is &apos;resumable&apos;. Essentially, in MongoDB 4.4 and later, drivers will check command errors returned by the server for the &lt;tt&gt;ResumableChangeStreamError&lt;/tt&gt; error label - if this label is present, then the error shall be considered resumable and the driver will re-create the change stream cursor.&lt;br/&gt;
Pre MongoDB 4.4, drivers used much broader criteria for determining change stream resumability. Specifically, &lt;tt&gt;CursorNotFound&lt;/tt&gt; (thrown if the driver tries to iterate a cursor that has already been killed on the server) errors were resumable but with the use of error labels, and the updated &lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/change-streams/change-streams.rst#resume-process&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;change stream resume process&lt;/a&gt; this is no longer the case. Consequently, MongoDB 4.4-era drivers might break existing applications that rely on change stream resumability when encountering &lt;tt&gt;CursorNotFound&lt;/tt&gt; exceptions. &lt;br/&gt;
It is expected that drivers seldom attempt to iterate cursors that have already been killed on the server so this backward breaking behavior change will not result in any application/user-visible errors.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1403214">SERVER-49349</key>
            <summary>ChangeStreams cannot resume from CursorNotFound errors in MongoDB 4.4</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="prashant.mital">Prashant Mital</reporter>
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                <created>Tue, 7 Jul 2020 21:33:27 +0000</created>
                <updated>Fri, 27 Oct 2023 20:42:11 +0000</updated>
                            <resolved>Wed, 8 Jul 2020 20:46:01 +0000</resolved>
                                                                    <component>Querying</component>
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