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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>[DRIVERS-2782] Expose atClusterTime parameter in snapshot sessions</title>
                <link>https://jira.mongodb.org/browse/DRIVERS-2782</link>
                <project id="10980" key="DRIVERS">Drivers</project>
                    <description>&lt;div class=&quot;panel&quot; style=&quot;background-color: #fafbfc;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #fafbfc;&quot;&gt;
&lt;h3&gt;&lt;a name=&quot;Summary&quot;&gt;&lt;/a&gt;&lt;b&gt;Summary&lt;/b&gt;&lt;/h3&gt;

&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/sessions/snapshot-sessions.rst#server-commands&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;snapshot session specification&lt;/a&gt; states that drivers should store the atClusterTime value in a private field, but there are many instances where an application may want to set/access the value.&lt;/p&gt;
&lt;h3&gt;&lt;a name=&quot;Motivation&quot;&gt;&lt;/a&gt;&lt;b&gt;Motivation&lt;/b&gt;&lt;/h3&gt;
&lt;h4&gt;&lt;a name=&quot;Whoistheaffectedenduser%3F&quot;&gt;&lt;/a&gt;Who is the affected end user?&lt;/h4&gt;

&lt;p&gt;Users of a driver that would like to take advantage of snapshot reads.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Howdoesthisaffecttheenduser%3F&quot;&gt;&lt;/a&gt;How does this affect the end user?&lt;/h4&gt;

&lt;p&gt;There are a few snapshot sessions usages that are not possible to do today given the current limitation. e.g.&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Perform a snapshot read and then start a changestream from the snapshot&apos;s timestamp.&lt;/li&gt;
	&lt;li&gt;Perform a snapshot read in one thread, and then perform another read in a separate thread using the same snapshot timestamp.&lt;/li&gt;
	&lt;li&gt;Perform a write and then perform a snapshot read using the operation time of the write.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;&#160;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Howlikelyisitthatthisproblemorusecasewilloccur%3F&quot;&gt;&lt;/a&gt;How likely is it that this problem or use case will occur?&lt;/h4&gt;

&lt;p&gt;&lt;em&gt;Main path? Edge case?&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Iftheproblemdoesoccur%2Cwhataretheconsequencesandhowseverearethey%3F&quot;&gt;&lt;/a&gt;If the problem does occur, what are the consequences and how severe are they?&lt;/h4&gt;

&lt;p&gt;&lt;em&gt;Minor annoyance at a log message? Performance concern? Outage/unavailability? Failover can&apos;t complete?&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisissueurgent%3F&quot;&gt;&lt;/a&gt;Is this issue urgent?&lt;/h4&gt;

&lt;p&gt;&lt;em&gt;Does this ticket have a required timeline? What is it?&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisticketrequiredbyadownstreamteam%3F&quot;&gt;&lt;/a&gt;Is this ticket required by a downstream team?&lt;/h4&gt;

&lt;p&gt;It is required for Device Sync. In the meantime, we had to expose this field in our fork of the go driver: &lt;a href=&quot;https://github.com/mongodb-forks/mongo-go-driver/commit/5cd00b584fc0e0019f20822274214110b2f55ab2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb-forks/mongo-go-driver/commit/5cd00b584fc0e0019f20822274214110b2f55ab2&lt;/a&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisticketonlyfortests%3F&quot;&gt;&lt;/a&gt;Is this ticket only for tests?&lt;/h4&gt;

&lt;p&gt;No&lt;/p&gt;
&lt;h3&gt;&lt;a name=&quot;AcceptanceCriteria&quot;&gt;&lt;/a&gt;&lt;b&gt;Acceptance Criteria&lt;/b&gt;&lt;/h3&gt;
&lt;ol&gt;
	&lt;li&gt;Ability to set the snapshot timestamp for a session&lt;/li&gt;
	&lt;li&gt;Ability to retrieve the snapshot timestamp from a session&lt;/li&gt;
&lt;/ol&gt;
&lt;/div&gt;&lt;/div&gt;</description>
                <environment></environment>
        <key id="2511058">DRIVERS-2782</key>
            <summary>Expose atClusterTime parameter in snapshot sessions</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>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="kiro.morkos@mongodb.com">Kiro Morkos</reporter>
                        <labels>
                    </labels>
                <created>Tue, 28 Nov 2023 19:22:59 +0000</created>
                <updated>Thu, 21 Dec 2023 21:19:50 +0000</updated>
                                                                <component>Sessions</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
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&lt;ul&gt;
	&lt;li&gt;&#160;&lt;/li&gt;
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&lt;p&gt;&lt;b&gt;Commits for syncing spec/prose tests&lt;/b&gt; &lt;br/&gt;
&lt;em&gt;(and/or refer to an existing language POC if needed)&lt;/em&gt;&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&#160;&lt;/li&gt;
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&lt;p&gt;&lt;b&gt;Context for other referenced/linked tickets&lt;/b&gt;&lt;/p&gt;
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	&lt;li&gt;&#160;&lt;/li&gt;
&lt;/ul&gt;

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