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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-40624] snapshot_cursor_commands_mongos.js shouldn&apos;t move same chunk twice during all shard reads set up</title>
                <link>https://jira.mongodb.org/browse/SERVER-40624</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Before running the multiShardAllReads test case, snapshot_cursor_commands_mongos.js shards a collection, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ee9c8b7d7382cb7f91b72c2e680f18016754ee35/jstests/sharding/snapshot_cursor_commands_mongos.js#L87-L88&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;splits it at 4 and 8&lt;/a&gt;, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ee9c8b7d7382cb7f91b72c2e680f18016754ee35/jstests/sharding/snapshot_cursor_commands_mongos.js#L90-L95&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;moves the chunk containing 0 to shard0, 4 to shard1, and 7 to shard2&lt;/a&gt;, and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ee9c8b7d7382cb7f91b72c2e680f18016754ee35/jstests/sharding/snapshot_cursor_commands_mongos.js#L97-L102&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;asserts each shard owns one chunk by checking the config.chunks collection&lt;/a&gt;. The same chunk contains 4 and 7 though, so no chunk is guaranteed to end on shard1, but the test rarely fails because shard1 is almost always chosen as the primary shard, so the 3rd chunk that isn&apos;t moved will remain on it.&lt;/p&gt;

&lt;p&gt;Instead of relying on which shard is the primary without explicitly enforcing it, the test should be updated to move a different chunk to each shard instead of moving the same one twice.&lt;/p&gt;</description>
                <environment></environment>
        <key id="737631">SERVER-40624</key>
            <summary>snapshot_cursor_commands_mongos.js shouldn&apos;t move same chunk twice during all shard reads set up</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="jack.mulrow@mongodb.com">Jack Mulrow</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Fri, 12 Apr 2019 18:47:14 +0000</created>
                <updated>Sun, 29 Oct 2023 22:22:01 +0000</updated>
                            <resolved>Mon, 15 Apr 2019 16:28:02 +0000</resolved>
                                                    <fixVersion>4.1.11</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="2213549" author="xgen-internal-githook" created="Mon, 15 Apr 2019 16:27:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40624&quot; title=&quot;snapshot_cursor_commands_mongos.js shouldn&amp;#39;t move same chunk twice during all shard reads set up&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40624&quot;&gt;&lt;del&gt;SERVER-40624&lt;/del&gt;&lt;/a&gt; Ensure a chunk is moved to each shard in snapshot_cursor_commands_mongos.js all shard reads case&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7ceeb459f10e57b843eddf1c28a7565d1aaf3bba&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7ceeb459f10e57b843eddf1c28a7565d1aaf3bba&lt;/a&gt;&lt;/p&gt;</comment>
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