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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-37550] Relax rules on setting readOnce flag on WiredTiger session</title>
                <link>https://jira.mongodb.org/browse/SERVER-37550</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A WiredTiger transaction may be started before mongod &apos;find&apos; or &apos;getMore&apos; command execution begins, through readConcern or multi-statement transaction execution.  If the readOnce flag is not permitted to be set with a storage transaction active, this will result in an invariant if we attempt to set readOnce in the &apos;find&apos; or &apos;getMore&apos; execution path.  Additionally, the fact that a transaction is active is not directly exposed to the upper layers (i.e. RecoveryUnit has no inActiveTxn()), so this is difficult to reliably prevent.&lt;/p&gt;

&lt;p&gt;Since this restriction is not required by WiredTiger itself, we can relax the API to allow the readOnce flag to be set if and only if no cursors are open, even if a transaction is open. &lt;/p&gt;</description>
                <environment></environment>
        <key id="616711">SERVER-37550</key>
            <summary>Relax rules on setting readOnce flag on WiredTiger session</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="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="matthew.russotto@mongodb.com">Matthew Russotto</assignee>
                                    <reporter username="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
                    </labels>
                <created>Wed, 10 Oct 2018 19:43:23 +0000</created>
                <updated>Sun, 29 Oct 2023 22:27:31 +0000</updated>
                            <resolved>Thu, 11 Oct 2018 21:02:45 +0000</resolved>
                                                    <fixVersion>4.1.4</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2030337" author="xgen-internal-githook" created="Thu, 11 Oct 2018 17:17:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37550&quot; title=&quot;Relax rules on setting readOnce flag on WiredTiger session&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37550&quot;&gt;&lt;del&gt;SERVER-37550&lt;/del&gt;&lt;/a&gt; Relax rules on setting readOnce flag on WiredTiger session&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6bd60591fc1ab2eb8b2cc4fd85407bc4d9baf89a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6bd60591fc1ab2eb8b2cc4fd85407bc4d9baf89a&lt;/a&gt;&lt;/p&gt;</comment>
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