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    <title>MongoDB Jira</title>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-25756] Replication should ensure that minValid is hit exactly</title>
                <link>https://jira.mongodb.org/browse/SERVER-25756</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently replication just checks that we become &amp;gt;= minValid before becoming secondary, without checking that we actually applied the exact minValid optime. This can lead to an undetected corruption if there was an upstream rollback between the time we fetched documents that caused us to set minValid and the time we fetched the oplog entry that is &amp;gt;= minValid. Note that if we detect this state, the only possible fix is to do a full resync.&lt;/p&gt;</description>
                <environment></environment>
        <key id="311229">SERVER-25756</key>
            <summary>Replication should ensure that minValid is hit exactly</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-repl">Backlog - Replication Team</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                    </labels>
                <created>Tue, 23 Aug 2016 17:41:59 +0000</created>
                <updated>Tue, 6 Dec 2022 04:18:24 +0000</updated>
                            <resolved>Mon, 27 Nov 2017 21:14:20 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1735489" author="greg.mckeon" created="Mon, 27 Nov 2017 21:14:20 +0000"  >&lt;p&gt;This will go away with recoverable rollback.&lt;/p&gt;</comment>
                            <comment id="1726884" author="judah.schvimer" created="Wed, 15 Nov 2017 20:13:57 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=redbeard0531&quot; class=&quot;user-hover&quot; rel=&quot;redbeard0531&quot;&gt;redbeard0531&lt;/a&gt;, Do we still expect this to be possible? The sync source resolver checks for the &lt;tt&gt;requiredOpTime&lt;/tt&gt; (minValid) after getting the sync source&apos;s RBID, and then we check the RBID for equality after receiving the first batch of documents. If a rollback occurs on the sync source after that, it should kill our cursor and make us go back into sync source selection. We thus should never sync operations from a branch of history that does not include &lt;tt&gt;minValid&lt;/tt&gt;. &lt;/p&gt;

&lt;p&gt;I agree, however, that we should invariant that we in fact hit &lt;tt&gt;minValid&lt;/tt&gt; exactly. &lt;/p&gt;</comment>
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            <issuekey id="288050">SERVER-24223</issuekey>
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