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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-22795] lastVisibleOpTime for committed snapshot needs to be the actual snapshot used for the query</title>
                <link>https://jira.mongodb.org/browse/SERVER-22795</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;One of the $replData metadata items returned from a query is the lastVisibleOpTime.  This value is currently populated by the optime associated with whatever the current read committed snapshot is at the moment the read query finishes.  This is not necessarily the same as the optime associated with the snapshot used for the query, however, since this value can be updated while the query is running.&lt;br/&gt;
We need to record the actual optime used for the &lt;b&gt;first&lt;/b&gt; snapshot that the read query uses, for lastVisibleOpTime.  &lt;br/&gt;
Note that when queries yield, they can switch snapshots.  For correctness with sharding config servers, we must record the optime of the first snapshot used for the query.&lt;/p&gt;</description>
                <environment></environment>
        <key id="267283">SERVER-22795</key>
            <summary>lastVisibleOpTime for committed snapshot needs to be the actual snapshot used for the query</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="4">Incomplete</resolution>
                                        <assignee username="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 22 Feb 2016 20:27:07 +0000</created>
                <updated>Mon, 22 Feb 2016 21:40:01 +0000</updated>
                            <resolved>Mon, 22 Feb 2016 21:02:57 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1181061" author="milkie" created="Mon, 22 Feb 2016 21:02:57 +0000"  >&lt;p&gt;Not going to tackle this problem this way; going to synchronize reads from mongos instead.&lt;/p&gt;</comment>
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