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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-76289] During shard split or merge, creating a new change stream after the block timestamp might skip events on the recipient</title>
                <link>https://jira.mongodb.org/browse/SERVER-76289</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;ul&gt;
	&lt;li&gt;Donor blocks writes &#160;for tenant1 at TS(100).&lt;/li&gt;
	&lt;li&gt;New $changeStream aggregate comes in, initializes start time to current clusterTime, TS(300), returns empty batch with PBRT=TS(300)&lt;/li&gt;
	&lt;li&gt;Migration commits. We advance the recipient clock to be at least &#160;blockTS , here is TS(100).&lt;/li&gt;
	&lt;li&gt;On Recipient, new writes starts to come in &#160;and they writes at TS(200).&lt;/li&gt;
	&lt;li&gt;Client issues CS getMore, gets ResumeTenantChangeStream, driver retries&lt;/li&gt;
	&lt;li&gt;CS cursor resumes from the last token it saw, i.e. the PBRT at TS(300)&lt;/li&gt;
	&lt;li&gt;Change stream resumes on recipient but skips all events that occurred between TS(100) and TS(300)&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2318618">SERVER-76289</key>
            <summary>During shard split or merge, creating a new change stream after the block timestamp might skip events on the recipient</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="mickey.winters@mongodb.com">Mickey Winters</assignee>
                                    <reporter username="mickey.winters@mongodb.com">Mickey Winters</reporter>
                        <labels>
                    </labels>
                <created>Wed, 19 Apr 2023 15:03:00 +0000</created>
                <updated>Sun, 29 Oct 2023 21:22:48 +0000</updated>
                            <resolved>Thu, 4 May 2023 15:17:30 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="5398667" author="xgen-internal-githook" created="Wed, 3 May 2023 19:31:51 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Mickey. J Winters&apos;, &apos;email&apos;: &apos;mickey.winters@mongodb.com&apos;, &apos;username&apos;: &apos;mjrb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-76289&quot; title=&quot;During shard split or merge, creating a new change stream after the block timestamp might skip events on the recipient&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76289&quot;&gt;&lt;del&gt;SERVER-76289&lt;/del&gt;&lt;/a&gt; Block opening new change streams during shard split or shard merge critical section&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/01e26506a0981b4141bc65c9d016666ada60319e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/01e26506a0981b4141bc65c9d016666ada60319e&lt;/a&gt;&lt;/p&gt;</comment>
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