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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-27099] Consider removing comparison operators from OpTime class</title>
                <link>https://jira.mongodb.org/browse/SERVER-27099</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Comparing OpTimes from different terms is fundamentally problematic as they could be from different branches of history.  Every time we compare two optimes without checking that they come from the same term is suspicious.  We at least need to audit all places where do do optime comparisons, and we should consider removing the optime comparison operators entirely so all places that compare optimes must think about term differences explicitly.&lt;/p&gt;</description>
                <environment></environment>
        <key id="332682">SERVER-27099</key>
            <summary>Consider removing comparison operators from OpTime class</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Thu, 17 Nov 2016 20:13:54 +0000</created>
                <updated>Wed, 19 Apr 2017 19:26:50 +0000</updated>
                            <resolved>Wed, 19 Apr 2017 19:26:50 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1552958" author="spencer" created="Wed, 19 Apr 2017 19:26:50 +0000"  >&lt;p&gt;We definitely need to be careful whenever we&apos;re comparing optimes, but I don&apos;t think this is the way to enforce that.&lt;/p&gt;</comment>
                            <comment id="1437971" author="spencer" created="Fri, 18 Nov 2016 20:31:20 +0000"  >&lt;p&gt;They do, and we compare the term before the timestamp, the problem is that you can&apos;t actually assume that optimes from different terms have a happens-before relationship as they may come from different branches of history (one of which will later roll back).  This is how you get the issues like &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27053&quot; title=&quot;Possibility to confirm w:majority write that has been rolled back&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27053&quot;&gt;&lt;del&gt;SERVER-27053&lt;/del&gt;&lt;/a&gt; where seeing a &apos;newer&apos; op from a higher term makes you think everything that happened an older term happened &apos;before&apos; it.&lt;/p&gt;</comment>
                            <comment id="1437589" author="schwerin" created="Fri, 18 Nov 2016 14:55:47 +0000"  >&lt;p&gt;Shouldn&apos;t optime objects just contain the term?&lt;/p&gt;</comment>
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            <issuekey id="333687">SERVER-27161</issuekey>
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