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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-38468] Only create coordinator in memory on coordinateCommit</title>
                <link>https://jira.mongodb.org/browse/SERVER-38468</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Previously with the old commit protocol we would create a transaction coordinator in memory on the coordinator shard when the first statement of the transaction arrived with a coordinator: true flag. Now that we&apos;re using an RPC based protocol this isn&apos;t necessary. We can instead create the coordinator when the coordinator shard receives coordinateCommit with a participant list.&lt;/p&gt;</description>
                <environment></environment>
        <key id="647668">SERVER-38468</key>
            <summary>Only create coordinator in memory on coordinateCommit</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="matthew.saltz@mongodb.com">Matthew Saltz</assignee>
                                    <reporter username="matthew.saltz@mongodb.com">Matthew Saltz</reporter>
                        <labels>
                    </labels>
                <created>Fri, 7 Dec 2018 20:55:05 +0000</created>
                <updated>Mon, 10 Dec 2018 16:10:42 +0000</updated>
                            <resolved>Mon, 10 Dec 2018 16:10:42 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2085599" author="matthew.saltz" created="Mon, 10 Dec 2018 16:10:35 +0000"  >&lt;p&gt;Turns out this makes recovering the decision/making coordinateCommit calls idempotent much more complicated, to the point that it isn&apos;t worth it. This is because when a coordinateCommit command arrives, if a coordinator does not exist in memory, we don&apos;t know if that means that commit has completed or that it hasn&apos;t started.&lt;/p&gt;</comment>
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