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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-36339] Wiredtiger corrupted after unclean shutdown</title>
                <link>https://jira.mongodb.org/browse/SERVER-36339</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi, I saw some previous bug report, i believe i ran into the same issue. Mongo is not able to be repaired. Log attached along with&#160;WiredTiger.wt&lt;/p&gt;

&lt;p&gt;Cheers,&lt;/p&gt;

&lt;p&gt;KaiJun&lt;/p&gt;</description>
                <environment>CentOS Linux release 7.4.1708</environment>
        <key id="577876">SERVER-36339</key>
            <summary>Wiredtiger corrupted after unclean shutdown</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="kjchew82">KaiJun</reporter>
                        <labels>
                            <label>envm</label>
                            <label>rpo</label>
                            <label>rpu</label>
                            <label>trcf</label>
                            <label>wtc</label>
                    </labels>
                <created>Sat, 28 Jul 2018 05:47:06 +0000</created>
                <updated>Tue, 4 Sep 2018 03:02:47 +0000</updated>
                            <resolved>Wed, 1 Aug 2018 14:23:43 +0000</resolved>
                                    <version>3.6.2</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1962804" author="kjchew82" created="Wed, 1 Aug 2018 14:32:26 +0000"  >&lt;p&gt;Ok, got it. Thank you so much for the help.&lt;/p&gt;

&lt;p&gt;KaiJun&lt;/p&gt;</comment>
                            <comment id="1962783" author="nick.brewer" created="Wed, 1 Aug 2018 14:23:32 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kjchew82&quot; class=&quot;user-hover&quot; rel=&quot;kjchew82&quot;&gt;kjchew82&lt;/a&gt;&#160;&lt;/p&gt;

&lt;p&gt;Thanks for the additional information. Unfortunately, this error indicates that there was corruption on the disk, most often caused by a faulty storage layer. In this situation, our best recommendation would be to [resync the affected node|&lt;a href=&quot;https://docs.mongodb.com/manual/tutorial/resync-replica-set-member/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/tutorial/resync-replica-set-member/&lt;/a&gt;] or [restore from a backup|&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;https://docs.mongodb.com/manual/core/backups/&lt;/a&gt;] if possible.&lt;/p&gt;

&lt;p&gt;To prevent this type of problem in the future please take note of the following guidelines to help&#160;mitigate any issues related to unreliable storage layers or server failures.&#160;&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Make sure your &lt;a href=&quot;#disk-and-storage-systems]&quot; target=&quot;_blank&quot; rel=&quot;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 [most recent version|&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;https://docs.mongodb.com/manual/release-notes/&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 [backups of your databases|&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;https://docs.mongodb.com/manual/core/backups/&lt;/a&gt;] and verify that you have a process in place to restore them.&lt;/li&gt;
	&lt;li&gt;Use a [replica set|&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;https://docs.mongodb.com/manual/replication/&lt;/a&gt;] for improved reliability.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;-Nick&lt;/p&gt;</comment>
                            <comment id="1960360" author="kjchew82" created="Mon, 30 Jul 2018 16:20:25 +0000"  >&lt;p&gt;Hi Nick, it is always 3.6.2. &lt;/p&gt;

&lt;p&gt;Cheers,&lt;br/&gt;
KaiJun&lt;/p&gt;</comment>
                            <comment id="1960252" author="nick.brewer" created="Mon, 30 Jul 2018 15:29:32 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kjchew82&quot; class=&quot;user-hover&quot; rel=&quot;kjchew82&quot;&gt;kjchew82&lt;/a&gt; Has this machine always been running on 3.6.2, or was it upgraded recently? &lt;/p&gt;

&lt;p&gt;Thanks, &lt;br/&gt;
Nick&lt;/p&gt;</comment>
                            <comment id="1959989" author="kjchew82" created="Mon, 30 Jul 2018 13:45:40 +0000"  >&lt;p&gt;Hi Nick,&lt;/p&gt;

&lt;p&gt;Replaced, new error regarding journal appear, updated log attached.&lt;/p&gt;

&lt;p&gt;Environment:  vm instances from cloud provider with SAN storage.&lt;br/&gt;
Cause of crash: networking hardware migrations, causing SAN disconnected.&lt;/p&gt;

&lt;p&gt;dmesg attached.&lt;/p&gt;

&lt;p&gt;Cheers,&lt;br/&gt;
KaiJun&lt;/p&gt;

&lt;p&gt; &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/192932/192932_mongod_updated.log&quot; title=&quot;mongod_updated.log attached to SERVER-36339&quot;&gt;mongod_updated.log&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/192933/192933_dmesg&quot; title=&quot;dmesg attached to SERVER-36339&quot;&gt;dmesg&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>
                            <comment id="1959595" author="nick.brewer" created="Mon, 30 Jul 2018 02:12:30 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kjchew82&quot; class=&quot;user-hover&quot; rel=&quot;kjchew82&quot;&gt;kjchew82&lt;/a&gt; I&apos;ve attached the files after a repair attempt. Would you please extract these files, substitute them for the current ones in your &lt;tt&gt;$dbpath&lt;/tt&gt;, and let us know if it resolves the issue?&lt;/p&gt;

&lt;p&gt;Additionally, I&apos;d like to confirm the following:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;The underlying cause of the crash (power failure, disk corruption, etc)&lt;/li&gt;
	&lt;li&gt;The environment (native, virtualized, container)&lt;/li&gt;
&lt;/ul&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/192917/192917_repair-attempt.tar.gz&quot; title=&quot;repair-attempt.tar.gz attached to SERVER-36339&quot;&gt;repair-attempt.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>
                    </comments>
                    <attachments>
                            <attachment id="192894" name="WiredTiger.turtle" size="1063" author="kjchew82" created="Sat, 28 Jul 2018 05:52:22 +0000"/>
                            <attachment id="192893" name="WiredTiger.wt" size="237568" author="kjchew82" created="Sat, 28 Jul 2018 05:46:06 +0000"/>
                            <attachment id="192933" name="dmesg" size="9492" author="kjchew82" created="Mon, 30 Jul 2018 13:45:34 +0000"/>
                            <attachment id="192892" name="mongod.log" size="10064" author="kjchew82" created="Sat, 28 Jul 2018 05:46:07 +0000"/>
                            <attachment id="192932" name="mongod_updated.log" size="10071" author="kjchew82" created="Mon, 30 Jul 2018 13:45:15 +0000"/>
                            <attachment id="192917" name="repair-attempt.tar.gz" size="12207" author="nick.brewer" created="Mon, 30 Jul 2018 02:12:26 +0000"/>
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