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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-35539] Updated OID format may cause problems in multiversion elections</title>
                <link>https://jira.mongodb.org/browse/SERVER-35539</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34975&quot; title=&quot;Server should treat ObjectId timestamp as unsigned&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34975&quot;&gt;SERVER-34975&lt;/a&gt; changes the OID format so the timestamp in the upper four bytes gets treated as an unsigned int, instead of a signed int as it was previously. As a result of that change, the OID::fromTerm() function now has slightly different behavior. This function creates a timestamp with std::numeric_limits&amp;lt;Timestamp&amp;gt;::max() in the upper four bytes, which means those bytes are always 0x7fffffff before &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32975&quot; title=&quot;Enhance usersInfo for credential inspection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32975&quot;&gt;&lt;del&gt;SERVER-32975&lt;/del&gt;&lt;/a&gt; and always 0xffffffff after.&lt;/p&gt;

&lt;p&gt;That difference causes global_snapshot_reads_downgrade_cluster.js to fail when the &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34975&quot; title=&quot;Server should treat ObjectId timestamp as unsigned&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34975&quot;&gt;SERVER-34975&lt;/a&gt; change is applied to 4.0 (which we no longer plan to do). That test has been removed from master, but this discrepancy still has the potential to cause problems in multiversion scenarios involving 4.0 (current does not have the change) and an eventual 4.2 (which will).&lt;/p&gt;

&lt;p&gt;It will probably be sufficient to change OID::fromTerm() to use a constant 0x7fffffff instead of trying to use ::max().&lt;/p&gt;</description>
                <environment></environment>
        <key id="557724">SERVER-35539</key>
            <summary>Updated OID format may cause problems in multiversion elections</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="justin.seyster@mongodb.com">Justin Seyster</reporter>
                        <labels>
                    </labels>
                <created>Mon, 11 Jun 2018 22:39:02 +0000</created>
                <updated>Tue, 6 Dec 2022 03:26:35 +0000</updated>
                            <resolved>Fri, 15 Jun 2018 14:51:01 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1921765" author="david.storch" created="Fri, 15 Jun 2018 14:51:01 +0000"  >&lt;p&gt;Instead of pursuing this fix, we plan to revert the changes for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34975&quot; title=&quot;Server should treat ObjectId timestamp as unsigned&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34975&quot;&gt;SERVER-34975&lt;/a&gt;.&lt;/p&gt;</comment>
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