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    <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-33924] parallel.js tries to move chunks to non-existent shards</title>
                <link>https://jira.mongodb.org/browse/SERVER-33924</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;jstests/sharding/parallel.js&lt;/tt&gt; creates 11 chunks for 10000 documents then attempts to distribute them across 3 shards by moving each to a random shard. It does so &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9850f1f190/jstests/sharding/parallel.js#L18-L22&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;by manipulating strings, which map to the old naming convention&lt;/a&gt; for standalone shards. As of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32052&quot; title=&quot;Update ShardingTest to default to starting shard servers as single-node replica sets rather than standalones&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32052&quot;&gt;&lt;del&gt;SERVER-32052&lt;/del&gt;&lt;/a&gt;, shards are replica sets, so these names don&apos;t match any shards, and each moveChunk fails (silently because the response is ignored).&lt;/p&gt;

&lt;p&gt;This is probably related to the increasing number of NoProgessMade batch write failures in &lt;tt&gt;parallel.js&lt;/tt&gt;, because the balancer is started before beginning a bulk insert and all 11 chunks are on one shard, leading to as many migrations as possible for this test setup.&lt;/p&gt;

&lt;p&gt;The test should be updated to pick a random shard correctly, possibly by creating a new helper in ShardingTest.&lt;/p&gt;</description>
                <environment></environment>
        <key id="512442">SERVER-33924</key>
            <summary>parallel.js tries to move chunks to non-existent shards</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="janna.golden@mongodb.com">Janna Golden</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Fri, 16 Mar 2018 14:48:40 +0000</created>
                <updated>Sun, 29 Oct 2023 22:33:42 +0000</updated>
                            <resolved>Mon, 19 Mar 2018 17:28:02 +0000</resolved>
                                                    <fixVersion>3.7.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1838546" author="xgen-internal-githook" created="Mon, 19 Mar 2018 17:27:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;golden.janna@gmail.com&apos;, &apos;name&apos;: &apos;jannaerin&apos;, &apos;username&apos;: &apos;jannaerin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33924&quot; title=&quot;parallel.js tries to move chunks to non-existent shards&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33924&quot;&gt;&lt;del&gt;SERVER-33924&lt;/del&gt;&lt;/a&gt; Make parallel.js move chunks to existent shards&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f7492502bfb24d1067e810ba9fd08e62f9a11c13&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f7492502bfb24d1067e810ba9fd08e62f9a11c13&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1836645" author="esha.maharishi@10gen.com" created="Fri, 16 Mar 2018 14:57:04 +0000"  >&lt;p&gt;Ah, nice!&lt;/p&gt;

&lt;p&gt;On Fri, Mar 16, 2018 at 10:49 AM Jack Mulrow (JIRA) &amp;lt;jira@mongodb.org&amp;gt;&lt;/p&gt;
</comment>
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