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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-27096] applyOps should validate its ops to ensure idempotency</title>
                <link>https://jira.mongodb.org/browse/SERVER-27096</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;applyOps commands can include things like $inc operators that make them non-idempotent. Since applyOps entries get put in the oplog unchanged, non-idempotent applyOps commands can lead to non-idempotent oplog entries which is problematic. We do not create any bad applyOps entries internally, but external ones are allowed. We should check applyOps commands before running them and error on non-idempotent operations.&lt;/p&gt;</description>
                <environment></environment>
        <key id="332657">SERVER-27096</key>
            <summary>applyOps should validate its ops to ensure idempotency</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                            <label>applyOps</label>
                            <label>idempotency</label>
                            <label>neweng</label>
                    </labels>
                <created>Thu, 17 Nov 2016 18:47:26 +0000</created>
                <updated>Tue, 6 Dec 2022 04:11:29 +0000</updated>
                                                                            <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="1800756" author="matthew.russotto" created="Fri, 9 Feb 2018 15:10:31 +0000"  >&lt;p&gt;The doTxn changes don&apos;t affect (non-atomic) applyOps.  I don&apos;t think it would be too difficult but it would result in the oplog entry not being stored exactly as given.&lt;/p&gt;</comment>
                            <comment id="1752227" author="spencer" created="Thu, 14 Dec 2017 18:29:02 +0000"  >&lt;p&gt;The change to doTxn in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32342&quot; title=&quot;Make doTxn rewrite non-idempotent writes into idempotent ones before logging them into the oplog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32342&quot;&gt;&lt;del&gt;SERVER-32342&lt;/del&gt;&lt;/a&gt; may also wind up happening for applyOps for free, which would eliminate the need for this work.&lt;/p&gt;</comment>
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            <issuekey id="488176">SERVER-32941</issuekey>
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            <issuelink>
            <issuekey id="488759">SERVER-32952</issuekey>
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            <issuelink>
            <issuekey id="361737">SERVER-28200</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="361771">SERVER-28205</issuekey>
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            <issuekey id="472319">SERVER-32342</issuekey>
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            <issuekey id="471725">SERVER-32305</issuekey>
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            <issuelink>
            <issuekey id="332644">SERVER-27092</issuekey>
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            <issuelink>
            <issuekey id="376088">SERVER-28897</issuekey>
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