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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-27356] Chunk is not marked as jumbo when it should</title>
                <link>https://jira.mongodb.org/browse/SERVER-27356</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Sharded cluster with two shards.&lt;/p&gt;

&lt;p&gt;Sharded collection &apos;test.test4&apos; on {my_flag:1}, and then wrote many many docs with the same my_flag value. Then split the range manually to make sure that the big chunk is the lowest. According to the changelog and to the config server logs, the balancer has tried to move the chunk and failed:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&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;  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;3169:2016-12-08T15:01:06.681-0500 I SHARDING [Balancer] Performing a split because migration test.test4: [{ my_flag: MinKey }, { my_flag: 100.0 }), from rs1, to rs2 failed for size reasons :: caused by :: ChunkTooBig: Cannot move chunk: the maximum number of documents for a chunk is 133, the maximum chunk size is 67108864, average document size is 648943. Found 3001 documents in chunk  ns: test.test4 { my_flag: MinKey } -&amp;gt; { my_flag: 100.0 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;3170-2016-12-08T15:01:06.700-0500 I SHARDING [Balancer] Marking chunk ns: test.test4, shard: rs1, lastmod: 1|1||5849b98b0d4c5ace47a95847, min: { my_flag: MinKey }, max: { my_flag: 100.0 } as jumbo.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;   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;3171-2016-12-08T15:01:06.728-0500 I SHARDING [Balancer] about to log metadata event into actionlog: { _id: &quot;AD-MAC10G.local-2016-12-08T15:01:06.728-0500-5849bc025079cb49a05d42aa&quot;, server: &quot;AD-MAC10G.local&quot;, clientAddr: &quot;&quot;, time: new Date(1481227266728), what: &quot;balancer.round&quot;, ns: &quot;&quot;, details: { executionTimeMillis: 296, errorOccured: false, candidateChunks: 1, chunksMoved: 1 } }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;However, the chunk is not marked as jumbo as per mongoS:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&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;  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;mongos&amp;gt; db.chunks.find({ns:&quot;test.test4&quot;})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;{ &quot;_id&quot; : &quot;test.test4-my_flag_MinKey&quot;, &quot;lastmod&quot; : Timestamp(2, 1), &quot;lastmodEpoch&quot; : ObjectId(&quot;5849b98b0d4c5ace47a95847&quot;), &quot;ns&quot; : &quot;test.test4&quot;, &quot;min&quot; : { &quot;my_flag&quot; : { &quot;$minKey&quot; : 1 } }, &quot;max&quot; : { &quot;my_flag&quot; : 100 }, &quot;shard&quot; : &quot;rs1&quot; }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ &quot;_id&quot; : &quot;test.test4-my_flag_100.0&quot;, &quot;lastmod&quot; : Timestamp(2, 0), &quot;lastmodEpoch&quot; : ObjectId(&quot;5849b98b0d4c5ace47a95847&quot;), &quot;ns&quot; : &quot;test.test4&quot;, &quot;min&quot; : { &quot;my_flag&quot; : 100 }, &quot;max&quot; : { &quot;my_flag&quot; : 200 }, &quot;shard&quot; : &quot;rs2&quot; }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ &quot;_id&quot; : &quot;test.test4-my_flag_200.0&quot;, &quot;lastmod&quot; : Timestamp(1, 4), &quot;lastmodEpoch&quot; : ObjectId(&quot;5849b98b0d4c5ace47a95847&quot;), &quot;ns&quot; : &quot;test.test4&quot;, &quot;min&quot; : { &quot;my_flag&quot; : 200 }, &quot;max&quot; : { &quot;my_flag&quot; : { &quot;$maxKey&quot; : 1 } }, &quot;shard&quot; : &quot;rs1&quot; }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="337678">SERVER-27356</key>
            <summary>Chunk is not marked as jumbo when it should</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="alex.komyagin@mongodb.com">Alexander Komyagin</reporter>
                        <labels>
                    </labels>
                <created>Fri, 9 Dec 2016 15:34:21 +0000</created>
                <updated>Fri, 9 Dec 2016 16:14:13 +0000</updated>
                            <resolved>Fri, 9 Dec 2016 16:14:13 +0000</resolved>
                                    <version>3.4.0</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                    <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="322167">SERVER-26531</issuekey>
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