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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-65714] ShardSplitDonorServiceTest fails due to a race condition when responding to recipient node monitor scheduled requests</title>
                <link>https://jira.mongodb.org/browse/SERVER-65714</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There is currently a race condition in the &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/src/mongo/db/serverless/shard_split_donor_service_test.cpp#L307&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BasicShardSplitDonorServiceInstanceCreation&lt;/a&gt; which can potentially lead to only one recipient node monitor being created and we would immediately start processing the Scheduled Requests however we expect to have all of the requests ready and in this case only one is available yet and an assert is thrown when trying to process the next one.&lt;/p&gt;

&lt;p&gt;&lt;del&gt;The solution is simply to only start responding to scheduled request once all the recipient node monitors are created and all the requests are scheduled.&lt;/del&gt;&lt;/p&gt;

&lt;p&gt;A solution would be to keep track of the hosts and hello requests in order to avoid potential missed hello responses. We should make sure each host as responded at least once in order to validate all the expected hello requests.&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Map the responded heartbeats to the hosts&lt;/li&gt;
	&lt;li&gt;keep processing heartbeats all hosts have responded to at least one heartbeat request&lt;/li&gt;
	&lt;li&gt;stop processing heartbeats once all the hosts have responded at least once or if the test waited too long to receive a request.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2026535">SERVER-65714</key>
            <summary>ShardSplitDonorServiceTest fails due to a race condition when responding to recipient node monitor scheduled requests</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-serverless">[DO NOT USE] Backlog - Server Serverless</assignee>
                                    <reporter username="mathis.bessa@mongodb.com">Mathis Bessa</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Fri, 15 Apr 2022 22:33:54 +0000</created>
                <updated>Tue, 6 Dec 2022 00:13:26 +0000</updated>
                            <resolved>Thu, 26 May 2022 10:49:52 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4574605" author="matt.broadstone" created="Thu, 26 May 2022 10:49:52 +0000"  >&lt;p&gt;This ticket now tracks a suggested improvement to a shard split unit test. I&apos;m closing this since we haven&apos;t seen any failures specific to the issue the improvement tries to address. &lt;/p&gt;</comment>
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