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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-24235] Improve misleading message &quot;... this shard does not contain the chunk&quot; reported if migration cannot start</title>
                <link>https://jira.mongodb.org/browse/SERVER-24235</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If the recipient shard fails to start migration early in the cycle, before it has installed the pending chunk into the metadata, its cleanup code will still try to clean it up.&lt;/p&gt;

&lt;p&gt;This results in a misleading message in the logs:&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;
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					&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;2016-05-20T13:10:50.088+0100 I SHARDING [migrateThread] starting receiving-end of migration of chunk { files_id: MinKey, n: MinKey } -&amp;gt; { files_id: ObjectId(&apos;000085341e8011e6a61c8380&apos;), n: 0 } for collection db.coll from rs/host1:38101,host2:38102 at epoch 573c7245e4f3add3194fa270&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;2016-05-20T13:10:50.089+0100 W SHARDING [migrateThread] failed to create index before migrating data.  error: IndexOptionsConflict: Index with name: files_id_1_n_1 already exists with different options&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;...&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;   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;2016-05-20T13:10:50.091+0100 W SHARDING [migrateThread] cannot remove pending chunk [{ files_id: MinKey, n: MinKey }, { files_id: ObjectId(&apos;000085341e8011e6a61c8380&apos;), n: 0 }), this shard does not contain the chunk&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;We should make sure to not do this cleanup if the pending chunk range has not been installed in the metadata.&lt;/p&gt;</description>
                <environment></environment>
        <key id="288220">SERVER-24235</key>
            <summary>Improve misleading message &quot;... this shard does not contain the chunk&quot; reported if migration cannot start</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="9">Done</resolution>
                                        <assignee username="backlog-server-sharding-emea">[DO NOT USE] Backlog - Sharding EMEA</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>Sharding-EMEA</label>
                            <label>neweng</label>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Fri, 20 May 2016 15:46:30 +0000</created>
                <updated>Tue, 6 Dec 2022 04:25:15 +0000</updated>
                            <resolved>Fri, 11 Jun 2021 09:42:38 +0000</resolved>
                                    <version>3.0.12</version>
                    <version>3.2.6</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="3872654" author="tommaso.tocci" created="Fri, 11 Jun 2021 09:42:38 +0000"  >&lt;p&gt;This code has changed significantly since 3.6 so this is no longer a problem.&lt;/p&gt;</comment>
                            <comment id="3870340" author="tommaso.tocci" created="Thu, 10 Jun 2021 10:16:26 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt; this ticket seems to only affect deprecated versions, do you think this is still applicable to newer versions?&lt;/p&gt;</comment>
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