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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-62181] JStests including multiple parallel migrations with failpoints shouldn&apos;t be run in the config server stepdown suites</title>
                <link>https://jira.mongodb.org/browse/SERVER-62181</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A JS test defining a sequence of commands like&lt;/p&gt;

&lt;p/&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&#160;var joinMoveChunk1 = moveChunkParallel(&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    staticMongod, st.s0.host, {Key: 10}, null, &apos;TestDB.TestColl&apos;, st.shard2.shardName);&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var joinMoveChunk2 = moveChunkParallel(&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    staticMongod, st.s0.host, {Key: 30}, null, &apos;TestDB.TestColl&apos;, st.shard3.shardName);&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;waitForMigrateStep(st.shard2, migrateStepNames.rangeDeletionTaskScheduled);&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;waitForMigrateStep(st.shard3, migrateStepNames.rangeDeletionTaskScheduled);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;unpauseMigrateAtStep(st.shard2, migrateStepNames.rangeDeletionTaskScheduled);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;joinMoveChunk1();&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;joinMoveChunk2();&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;May reach a deadlock state when a step-down event occurs after having issued the shard command for &lt;tt&gt;moveChunk1&lt;/tt&gt;, but before sending out the one for &lt;tt&gt;moveChunk2&lt;/tt&gt;, provoked by the fact that:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;on step-up, &lt;tt&gt;moveChunk1&lt;/tt&gt; will be regenerated as part of the recovery procedure of the balancer, which will only be completed once such commands also completes&lt;/li&gt;
	&lt;li&gt;&lt;tt&gt;moveChunk2&lt;/tt&gt; will also set for dispatching during the step-up, but the command won&apos;t be actually sent as long as the recovery is over.&lt;/li&gt;
	&lt;li&gt;nevertheless, the recovery will never end, since &lt;tt&gt;moveChunk1&lt;/tt&gt; is blocked by the presence of an active failpoint (which will only be disabled once &lt;tt&gt;moveChunk2&lt;/tt&gt; is over)&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;The behaviour described in 1) and 2) matches the designed functionality of the BalancerCommandsScheduler (and the legacy MigrationManager). The proposal is then to solve the problem by avoiding the execution of the affected tests in stepdown suites.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1954041">SERVER-62181</key>
            <summary>JStests including multiple parallel migrations with failpoints shouldn&apos;t be run in the config server stepdown suites</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="paolo.polato@mongodb.com">Paolo Polato</assignee>
                                    <reporter username="paolo.polato@mongodb.com">Paolo Polato</reporter>
                        <labels>
                    </labels>
                <created>Sun, 19 Dec 2021 22:14:36 +0000</created>
                <updated>Sun, 29 Oct 2023 21:44:51 +0000</updated>
                            <resolved>Tue, 4 Jan 2022 08:23:26 +0000</resolved>
                                                    <fixVersion>5.3.0</fixVersion>
                    <fixVersion>5.2.0-rc4</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4273307" author="xgen-internal-githook" created="Tue, 4 Jan 2022 09:20:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Paolo Polato&apos;, &apos;email&apos;: &apos;paolo.polato@mongodb.com&apos;, &apos;username&apos;: &apos;ppolato&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62181&quot; title=&quot;JStests including multiple parallel migrations with failpoints shouldn&amp;#39;t be run in the config server stepdown suites&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62181&quot;&gt;&lt;del&gt;SERVER-62181&lt;/del&gt;&lt;/a&gt; Do not run tests with multiple parallel migrations in stepdown suites&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 68b1c9ad4fe1c4015c587968bc23b7ec45c5dd17)&lt;br/&gt;
Branch: v5.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53b4b21bcf83ffc14156478293c90bfeab3b10a5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53b4b21bcf83ffc14156478293c90bfeab3b10a5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4262812" author="xgen-internal-githook" created="Tue, 21 Dec 2021 21:57:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Paolo Polato&apos;, &apos;email&apos;: &apos;paolo.polato@mongodb.com&apos;, &apos;username&apos;: &apos;ppolato&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62181&quot; title=&quot;JStests including multiple parallel migrations with failpoints shouldn&amp;#39;t be run in the config server stepdown suites&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62181&quot;&gt;&lt;del&gt;SERVER-62181&lt;/del&gt;&lt;/a&gt; Do not run tests with multiple parallel migrations in stepdown suites&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/68b1c9ad4fe1c4015c587968bc23b7ec45c5dd17&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/68b1c9ad4fe1c4015c587968bc23b7ec45c5dd17&lt;/a&gt;&lt;/p&gt;</comment>
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