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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-82498] Investigate reverting to simpler token version transition mechanism</title>
                <link>https://jira.mongodb.org/browse/SERVER-82498</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-81295&quot; title=&quot;Cannot resume V2 changeStream pipelines with V1 resume tokens&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-81295&quot;&gt;&lt;del&gt;SERVER-81295&lt;/del&gt;&lt;/a&gt;, we introduced a more stringent mechanism for handling the transition between token versions. This was motivated by the fact that v2 has a new &quot;split fragment&quot; feature that v1 cannot produce, and so resuming from a v1 token could, in certain cases, prevent an event at the same &lt;tt&gt;clusterTime&lt;/tt&gt; from being split. It was also necessary because both v1 and v2 tokens have an &lt;tt&gt;eventIdentifier&lt;/tt&gt; field, but its format differs between v1 and v2 even for the same event.&lt;/p&gt;

&lt;p&gt;In the future, particularly once v1 is no longer generated by supported versions, it may be desirable to revert to the simpler transition mechanism when moving between different token versions.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2484360">SERVER-82498</key>
            <summary>Investigate reverting to simpler token version transition mechanism</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
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                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="bernard.gorman@mongodb.com">Bernard Gorman</reporter>
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                <created>Fri, 27 Oct 2023 14:31:13 +0000</created>
                <updated>Sat, 28 Oct 2023 01:02:09 +0000</updated>
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