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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-34182] Retry SnapshotTooOld errors in multiversion tests for global snapshot reads</title>
                <link>https://jira.mongodb.org/browse/SERVER-34182</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the upgrade / downgrade tests for global snapshot reads introduced in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34019&quot; title=&quot;Downgrade global snapshot reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34019&quot;&gt;&lt;del&gt;SERVER-34019&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34020&quot; title=&quot;Upgrade global snapshot reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34020&quot;&gt;&lt;del&gt;SERVER-34020&lt;/del&gt;&lt;/a&gt; ignore SnapshotTooOld errors when expecting global snapshot reads to succeed. Those errors are somewhat acceptable, because they mean the read couldn&apos;t establish a snapshot, not that the attempt to do so was rejected. In 4.0 especially, the window for atClusterTime reads is very small and noop writes forced when the node hasn&apos;t reached the requested atClusterTime often advance the oldest timestamp beyond the requested time (see comments in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e5a37389/jstests/noPassthrough/readConcern_atClusterTime_noop_write.js#L47-L50&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;readConcern_atClusterTime_noop_write.js&lt;/a&gt;, so repeated snapshot errors are likely.&lt;/p&gt;

&lt;p&gt;The test should eventually be able to establish a snapshot for all reads though with enough attempts, so a retry loop should be added for the reads expected to succeed.&lt;/p&gt;</description>
                <environment></environment>
        <key id="518368">SERVER-34182</key>
            <summary>Retry SnapshotTooOld errors in multiversion tests for global snapshot reads</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="jack.mulrow@mongodb.com">Jack Mulrow</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Wed, 28 Mar 2018 22:03:52 +0000</created>
                <updated>Sun, 29 Oct 2023 22:33:15 +0000</updated>
                            <resolved>Thu, 29 Mar 2018 16:33:02 +0000</resolved>
                                                    <fixVersion>3.7.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1849269" author="xgen-internal-githook" created="Thu, 29 Mar 2018 16:32:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34182&quot; title=&quot;Retry SnapshotTooOld errors in multiversion tests for global snapshot reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34182&quot;&gt;&lt;del&gt;SERVER-34182&lt;/del&gt;&lt;/a&gt; Retry SnapshotTooOld errors in multiversion tests for global snapshot reads&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/edf4ceacfc64e53704614131dadeb0d12d7ebabf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/edf4ceacfc64e53704614131dadeb0d12d7ebabf&lt;/a&gt;&lt;/p&gt;</comment>
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