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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>
    </build-info>


<item>
            <title>[SERVER-36828] poweroutage resulted in corrupt wiredtiger database files</title>
                <link>https://jira.mongodb.org/browse/SERVER-36828</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello! Im using mongodb 3.6.5 on debian64 in kvm virtual machines (5 shards).&lt;/p&gt;

&lt;p&gt;after a poweroutage today my database files from four shards are corrupt and the mongod instances produce two different errors.&#160;&lt;/p&gt;

&lt;p&gt;i allready tried &quot;-repair&quot; and the wt-commandline-utility with no success.&lt;/p&gt;

&lt;p&gt;please help me, repairing my wiredtiger.wt &apos;s&lt;/p&gt;

&lt;p&gt;kind regards,&lt;/p&gt;

&lt;p&gt;michael&lt;/p&gt;</description>
                <environment></environment>
        <key id="593559">SERVER-36828</key>
            <summary>poweroutage resulted in corrupt wiredtiger database files</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="9">Done</resolution>
                                        <assignee username="nick.brewer">Nick Brewer</assignee>
                                    <reporter username="nelson.kingsley@gmx.at">Michael Adamcik</reporter>
                        <labels>
                            <label>envm</label>
                            <label>rpo</label>
                            <label>rps</label>
                            <label>trcf</label>
                            <label>wtc</label>
                    </labels>
                <created>Thu, 23 Aug 2018 18:55:38 +0000</created>
                <updated>Sat, 15 Sep 2018 14:48:49 +0000</updated>
                            <resolved>Fri, 24 Aug 2018 22:55:26 +0000</resolved>
                                    <version>3.6.5</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1985645" author="nick.brewer" created="Fri, 24 Aug 2018 22:55:14 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=nelson.kingsley%40gmx.at&quot; class=&quot;user-hover&quot; rel=&quot;nelson.kingsley@gmx.at&quot;&gt;nelson.kingsley@gmx.at&lt;/a&gt; Glad to hear it worked. Some considerations to prevent this type of issue moving forward:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Make sure your &lt;a href=&quot;https://docs.mongodb.com/manual/administration/production-notes/#disk-and-storage-systems&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;underlying storage is configured in an optimal way&lt;/a&gt;.&lt;/li&gt;
	&lt;li&gt;Schedule and perform regular checks of the integrity of your filesystems and disks.&lt;/li&gt;
	&lt;li&gt;Make sure to update MongoDB to 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;most recent version&lt;/a&gt;.&lt;/li&gt;
	&lt;li&gt;Never manipulate the underlying database files in any way while &lt;tt&gt;mongod&lt;/tt&gt; is running.&lt;/li&gt;
	&lt;li&gt;Always keep up to date &lt;a href=&quot;https://docs.mongodb.com/manual/core/backups/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;backups of your databases&lt;/a&gt; and verify that you have a process in place to restore them.&lt;/li&gt;
	&lt;li&gt;Use a &lt;a href=&quot;https://docs.mongodb.com/manual/replication/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;replica set&lt;/a&gt; for improved reliability.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;-Nick&lt;/p&gt;</comment>
                            <comment id="1985358" author="nelson.kingsley@gmx.at" created="Fri, 24 Aug 2018 19:25:54 +0000"  >&lt;p&gt;Hello Nick Brewer! Your repair attemts worked for 2 shards.. the other 2 had also filesystem damages and i lost some data... anyway... with your files i was able to recover the most important data with the wt command line utility.&lt;/p&gt;

&lt;p&gt;thank you very much,&lt;/p&gt;

&lt;p&gt;michael&lt;/p&gt;</comment>
                            <comment id="1984856" author="nick.brewer" created="Fri, 24 Aug 2018 14:46:29 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=nelson.kingsley%40gmx.at&quot; class=&quot;user-hover&quot; rel=&quot;nelson.kingsley@gmx.at&quot;&gt;nelson.kingsley@gmx.at&lt;/a&gt; I&apos;ve uploaded the files after a repair attempt. Could you please substitute them for the ones currently within your &lt;tt&gt;dbpath&lt;/tt&gt;, and let us know if this resolves the issue for you? &lt;/p&gt;

&lt;p&gt;Thanks, &lt;br/&gt;
-Nick&lt;/p&gt;

&lt;p&gt; &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/194677/194677_repair-attempt-1.tar.gz&quot; title=&quot;repair-attempt-1.tar.gz attached to SERVER-36828&quot;&gt;repair-attempt-1.tar.gz&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/194678/194678_repair-attempt-2.tar.gz&quot; title=&quot;repair-attempt-2.tar.gz attached to SERVER-36828&quot;&gt;repair-attempt-2.tar.gz&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/194679/194679_repair-attempt-3.tar.gz&quot; title=&quot;repair-attempt-3.tar.gz attached to SERVER-36828&quot;&gt;repair-attempt-3.tar.gz&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/194680/194680_repair-attempt-4.tar.gz&quot; title=&quot;repair-attempt-4.tar.gz attached to SERVER-36828&quot;&gt;repair-attempt-4.tar.gz&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
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