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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-27545] Include RBID in replSet metadata of command replies</title>
                <link>https://jira.mongodb.org/browse/SERVER-27545</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We often need to do a sequence of requests against a node that may be invalidated if the node rolls back. We use the RBID for this and are planning on expanding its use in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27403&quot; title=&quot;Consider term and rbid when validating the proposed sync source&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27403&quot;&gt;&lt;del&gt;SERVER-27403&lt;/del&gt;&lt;/a&gt;. This gets simpler and requires fewer round-trips if each reply includes the RBID.&lt;/p&gt;

&lt;p&gt;The main open question is whether to include the RBID from before the operation begins processing or after it completes and produces the rest of the results. &lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Including the &quot;before&quot; rbid makes it possible to later say &quot;these results haven&apos;t been rolled back if the rbid is the same.&quot;&lt;/li&gt;
	&lt;li&gt;Including the &quot;after&quot; rbid makes it possible to say &quot;if this rbid matches one you got before, you know nothing has rolled back yet&quot;&lt;/li&gt;
	&lt;li&gt;Including both lets you say both things&lt;/li&gt;
	&lt;li&gt;We could also report one rbid and require that it not change while processing a single request. We would then error all requests when a rollback happens. This is related to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27534&quot; title=&quot;All writing operations must fail if the term changes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27534&quot;&gt;&lt;del&gt;SERVER-27534&lt;/del&gt;&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;We may want to include this in 3.6 even if we don&apos;t add any code that reads it. This would allow us to start using it in 3.8 without any mixed-version compatibility/fallback code.&lt;/p&gt;</description>
                <environment></environment>
        <key id="341660">SERVER-27545</key>
            <summary>Include RBID in replSet metadata of command replies</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>Thu, 29 Dec 2016 23:19:57 +0000</created>
                <updated>Tue, 6 Dec 2022 04:08:39 +0000</updated>
                            <resolved>Mon, 27 Nov 2017 21:24:31 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1481640" author="judah.schvimer" created="Fri, 20 Jan 2017 20:54:01 +0000"  >&lt;p&gt;We need to figure out how to handle RBID detection during rollback.&lt;/p&gt;</comment>
                            <comment id="1475030" author="judah.schvimer" created="Wed, 11 Jan 2017 21:31:34 +0000"  >&lt;p&gt;This will be partially addressed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27543&quot; title=&quot;Create new metadata for oplog queries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27543&quot;&gt;&lt;del&gt;SERVER-27543&lt;/del&gt;&lt;/a&gt;. After it is completed we can discuss if more work needs to be done.&lt;/p&gt;</comment>
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            <issuekey id="338476">SERVER-27403</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="341404">SERVER-27534</issuekey>
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            <issuelink>
            <issuekey id="341625">SERVER-27543</issuekey>
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