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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-23864] How to recover data from files created by moveParanoia</title>
                <link>https://jira.mongodb.org/browse/SERVER-23864</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23425&quot; title=&quot;Inserts and updates during chunk migration get deleted in 3.0.9, 3.0.10&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23425&quot;&gt;&lt;del&gt;SERVER-23425&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;We have taken very seriously this issue.&lt;br/&gt;
I read the ticket  &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23425&quot; title=&quot;Inserts and updates during chunk migration get deleted in 3.0.9, 3.0.10&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23425&quot;&gt;&lt;del&gt;SERVER-23425&lt;/del&gt;&lt;/a&gt;  and found this.&lt;/p&gt;

&lt;p&gt;&amp;gt; Users who haven&#8217;t disabled the moveParanoia option should be able to recover this data manually. &lt;/p&gt;

&lt;p&gt;But I can&apos;t found documented procedures and instructions.&lt;br/&gt;
We use Mongodb v3.0.10 and do not disabled the movePranoia option.&lt;br/&gt;
 How can we recovery data?&lt;/p&gt;

&lt;p&gt;Best.&lt;/p&gt;</description>
                <environment></environment>
        <key id="281631">SERVER-23864</key>
            <summary>How to recover data from files created by moveParanoia</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="ramon.fernandez@mongodb.com">Ramon Fernandez Marina</assignee>
                                    <reporter username="service@awa.fm">Suguru Namura</reporter>
                        <labels>
                    </labels>
                <created>Fri, 22 Apr 2016 07:37:07 +0000</created>
                <updated>Fri, 22 Apr 2016 11:35:51 +0000</updated>
                            <resolved>Fri, 22 Apr 2016 11:35:49 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1243577" author="ramon.fernandez" created="Fri, 22 Apr 2016 11:35:39 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=service%40awa.fm&quot; class=&quot;user-hover&quot; rel=&quot;service@awa.fm&quot;&gt;service@awa.fm&lt;/a&gt;, documents moved by the balancer will be copied to files inside a directory called &lt;tt&gt;moveChunk&lt;/tt&gt;. Once you locate these &lt;tt&gt;moveChunk&lt;/tt&gt; directories in the data bearing nodes of your cluster, you will find &lt;tt&gt;.bson&lt;/tt&gt; files if the corresponding node was a donor in a chunk migration.&lt;/p&gt;

&lt;p&gt;You can use &lt;tt&gt;bsondump&lt;/tt&gt; to inspect the contents of these files and compare the documents with the data in your cluster. There are no automated tools to perform this comparison process, since the specific requirements on what to identify as a missing/incorrect document will heavily depend on your application and data distribution &amp;#8211; but it&apos;s not hard to write a small tool to meet your specific needs.&lt;/p&gt;

&lt;p&gt;If your cluster meets the requirements to be impacted by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23425&quot; title=&quot;Inserts and updates during chunk migration get deleted in 3.0.9, 3.0.10&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23425&quot;&gt;&lt;del&gt;SERVER-23425&lt;/del&gt;&lt;/a&gt;, I&apos;d recommend you upgrade to 3.0.11 or 3.2.5 right away if you haven&apos;t done so already. Even if you cluster hasn&apos;t been affected, it&apos;s best to be on the safe side.&lt;/p&gt;

&lt;p&gt;Finally, please note that the 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;, where your question will reach a larger audience. A question like this involving more discussion would be best posted 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;. See also our &lt;a href=&quot;https://www.mongodb.org/about/support/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Technical Support page&lt;/a&gt; for additional support resources.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
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