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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-29841] Unable to restore system.indexes in mongo 3.4</title>
                <link>https://jira.mongodb.org/browse/SERVER-29841</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi Team, I have restored complete database from mongo 2.6.6 to mongodb 3.4.5, when we migrate 3.0 database completed database is recovered same as earlier version. As the schema changed from 3.2 and 3.4. The database path file are scatted as collections and indexes but not in folder structure.&lt;/p&gt;

&lt;p&gt;We used mongodump and mongorestore commands for dump and restore the database&lt;/p&gt;

&lt;p&gt;But when I see the database from Robomongo, it show solder sturcture but missing system.indexes. We are unable to import this file name starting with &lt;b&gt;system.&lt;/b&gt; &lt;br/&gt;
when we try to create indexes, system throws duplicate record&lt;br/&gt;
Attached the screen shots in word document.&lt;br/&gt;
Please guide us in the update of servers.&lt;/p&gt;</description>
                <environment></environment>
        <key id="397733">SERVER-29841</key>
            <summary>Unable to restore system.indexes in mongo 3.4</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="kkoganti">Karthik koganti</reporter>
                        <labels>
                    </labels>
                <created>Fri, 23 Jun 2017 20:35:29 +0000</created>
                <updated>Mon, 26 Jun 2017 00:37:28 +0000</updated>
                            <resolved>Mon, 26 Jun 2017 00:37:27 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1606072" author="stennie" created="Mon, 26 Jun 2017 00:36:30 +0000"  >&lt;p&gt;Hi Karthik,&lt;/p&gt;

&lt;p&gt;Since you have migrated using &lt;tt&gt;mongodump&lt;/tt&gt; and &lt;tt&gt;mongorestore&lt;/tt&gt; from MongoDB 2.6.6 (MMAP storage engine) to MongoDB 3.4.5 (&lt;a href=&quot;https://docs.mongodb.com/manual/core/wiredtiger/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;WiredTiger storage engine&lt;/a&gt; by default), there are some expected differences in file structure and &lt;a href=&quot;https://docs.mongodb.com/ecosystem/drivers/driver-compatibility-reference/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;driver compatibility&lt;/a&gt;. The &lt;a href=&quot;https://docs.mongodb.com/manual/release-notes/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Release Notes&lt;/a&gt; section in the MongoDB manual includes a full list of new features and compatibility changes to be aware of for each major release. In particular, you will need to upgrade your MongoDB driver and tools if you want full support for newer MongoDB features.&lt;/p&gt;

&lt;p&gt;If Robomongo (now Robo 3T) isn&apos;t showing all collections and indexes, you are likely using an older version which does not have full support for the WiredTiger storage engine and MongoDB 3.4. For a quick check I would try connecting to your deployment using the v3.4.5 &lt;tt&gt;mongo&lt;/tt&gt; shell and check your indexes with &lt;tt&gt;db.collection.getIndexes()&lt;/tt&gt; for the collection in question. I also encourage you to try  the latest version of Robo 3T or a more actively maintained tool like &lt;a href=&quot;https://www.mongodb.com/products/compass&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MongoDB Compass&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Please note that SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;. A question like this involving more discussion would be best posted on the mongodb-user group.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Stephen&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="159469" name="Mongo new instance errors with system.indexes.docx" size="57345" author="kkoganti" created="Fri, 23 Jun 2017 20:34:15 +0000"/>
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