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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>[SERVER-51319] Check DatabaseShardingState::checkDbVersion after acquiring a storage snapshot for AutoGetCollection*LFR</title>
                <link>https://jira.mongodb.org/browse/SERVER-51319</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;DatabaseShardingState::checkDbVersion is normally called in DBLock, which AutoGetCollectionLFR will not use. I think we&apos;ll want to perform the check after setting up consistent catalog state (opening a storage snapshot), but need to prove it first in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51274&quot; title=&quot;Write up and prove design solution rationale for why sharding filtering metadata is safe to acquire later than catalog state&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51274&quot;&gt;&lt;del&gt;SERVER-51274&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Also remove the dassert lock checks in DatabaseShardingState::get() and CollectionShardingState::get() in this task.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1499218">SERVER-51319</key>
            <summary>Check DatabaseShardingState::checkDbVersion after acquiring a storage snapshot for AutoGetCollection*LFR</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="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Fri, 2 Oct 2020 18:07:33 +0000</created>
                <updated>Sun, 29 Oct 2023 22:02:27 +0000</updated>
                            <resolved>Wed, 16 Dec 2020 16:46:13 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3531921" author="xgen-internal-githook" created="Wed, 16 Dec 2020 06:55:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;email&apos;: &apos;dianna.hohensee@mongodb.com&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51319&quot; title=&quot;Check DatabaseShardingState::checkDbVersion after acquiring a storage snapshot for AutoGetCollection*LFR&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51319&quot;&gt;&lt;del&gt;SERVER-51319&lt;/del&gt;&lt;/a&gt; Call DatabaseShardingState::checkDbVersion() and CSS::getCollectionDescription() safely in AutoGetCollectionLockFree and expand lock-free sharding testing.&lt;/p&gt;

&lt;p&gt;CollectionShardingState and DatabaseShardingState can now be accessed without a lock via new&lt;br/&gt;
getSharedForLockFreeReads() functions on their respective interfaces.&lt;/p&gt;

&lt;p&gt;The shard key will now be available in the AutoGetCollection* RAII types via the CollectionPtr. This&lt;br/&gt;
allows lock-free reads to acquire a single view of the sharding state to use throughout a read&lt;br/&gt;
operation.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0efb63b64441f935b5d06f4180d0969434327551&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0efb63b64441f935b5d06f4180d0969434327551&lt;/a&gt;&lt;/p&gt;</comment>
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                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="1459215">SERVER-50678</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1497647">SERVER-51274</issuekey>
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                                        <issuelink>
            <issuekey id="1960475">SERVER-62457</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1533804">SERVER-52626</issuekey>
        </issuelink>
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                                        <issuelink>
            <issuekey id="1561202">SERVER-53257</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1570425">SERVER-53392</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1616491">SERVER-54402</issuekey>
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