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    <link>https://jira.mongodb.org</link>
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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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<item>
            <title>[SERVER-57099] Preserve donor oplog optime in o2 when avoid re-wrapping previously migrated retryable writes noop</title>
                <link>https://jira.mongodb.org/browse/SERVER-57099</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We had logic to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/576e2a257cb27ca89c4466a9bdef92e2b2d05ded/src/mongo/db/repl/tenant_oplog_applier.cpp#L652-L665&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;avoid re-wrapping&lt;/a&gt; previously migrated retryable writes noop in new noops. For example, if the previously migrated retryable writes noop the recipient fetches from the donor looks like {op: &apos;n&apos;, o2: &amp;lt;original_retryable_write_entry with ts 50&amp;gt;, ts: 100, ...}, the new noop the recipient writes would look like {op: &apos;n&apos;, o2: &amp;lt;original_retryable_write_entry with ts 50&amp;gt;, ts: xxx, ...} (where xxx is the timestamp at which the recipient writes the new noop).&lt;/p&gt;

&lt;p&gt;After failovers, the recipient uses &lt;a href=&quot;https://github.com/mongodb/mongo/blob/576e2a257cb27ca89c4466a9bdef92e2b2d05ded/src/mongo/db/repl/tenant_migration_recipient_service.cpp#L1455-L1464&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the ts in the o2 field of the last noop&lt;/a&gt; to determine where to resume applying/batching donor oplog entries.&lt;/p&gt;

&lt;p&gt;Using the example above, if the recipient has processed a donor oplog at ts: 100, we should resume applying/batching from ts: 100. But because &lt;a href=&quot;https://github.com/mongodb/mongo/blob/576e2a257cb27ca89c4466a9bdef92e2b2d05ded/src/mongo/db/repl/tenant_oplog_applier.cpp#L652-L665&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt; doesn&apos;t preserve the processed donor optime in o2, the recipient would mistakenly resume from ts: 50 after failovers, which could result in processing the same retryable write twice or having two entries of the same statement in the oplog chain.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1738137">SERVER-57099</key>
            <summary>Preserve donor oplog optime in o2 when avoid re-wrapping previously migrated retryable writes noop</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="lingzhi.deng@mongodb.com">Lingzhi Deng</assignee>
                                    <reporter username="lingzhi.deng@mongodb.com">Lingzhi Deng</reporter>
                        <labels>
                            <label>post-rc0</label>
                    </labels>
                <created>Thu, 20 May 2021 18:39:45 +0000</created>
                <updated>Sun, 29 Oct 2023 21:53:16 +0000</updated>
                            <resolved>Tue, 25 May 2021 21:10:24 +0000</resolved>
                                                    <fixVersion>5.0.0-rc1</fixVersion>
                    <fixVersion>5.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4108144" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 18:58:19 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3840430" author="xgen-internal-githook" created="Wed, 26 May 2021 01:57:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Lingzhi Deng&apos;, &apos;email&apos;: &apos;lingzhi.deng@mongodb.com&apos;, &apos;username&apos;: &apos;ldennis&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57099&quot; title=&quot;Preserve donor oplog optime in o2 when avoid re-wrapping previously migrated retryable writes noop&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57099&quot;&gt;&lt;del&gt;SERVER-57099&lt;/del&gt;&lt;/a&gt;: Preserve donor oplog optime in o2 when avoid re-wrapping previously migrated retryable writes noop&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 3637dce904cc334f7e72dcf23516f18c7b815eda)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/353fe976c8c0c7c6571abdad624b2b4e64173771&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/353fe976c8c0c7c6571abdad624b2b4e64173771&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3839554" author="xgen-internal-githook" created="Tue, 25 May 2021 19:52:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Lingzhi Deng&apos;, &apos;email&apos;: &apos;lingzhi.deng@mongodb.com&apos;, &apos;username&apos;: &apos;ldennis&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57099&quot; title=&quot;Preserve donor oplog optime in o2 when avoid re-wrapping previously migrated retryable writes noop&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57099&quot;&gt;&lt;del&gt;SERVER-57099&lt;/del&gt;&lt;/a&gt;: Preserve donor oplog optime in o2 when avoid re-wrapping previously migrated retryable writes noop&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3637dce904cc334f7e72dcf23516f18c7b815eda&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3637dce904cc334f7e72dcf23516f18c7b815eda&lt;/a&gt;&lt;/p&gt;</comment>
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