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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-36293] file:WiredTiger.wt, connection: WiredTiger.turtle: encountered an illegal file format or internal value (after server crash)</title>
                <link>https://jira.mongodb.org/browse/SERVER-36293</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello, I&apos;m using v3.6.4. I&apos;m unable to restart Mongod process after server crash. I tried --repair option as manual indicates, but had no progress.&lt;/p&gt;

&lt;p&gt;I&apos;ve uploaded my WiredTiger.* files plus mongod.log file in the hope that someone can respond with fixed WiredTiger.* files. I would be extremely grateful...thank you!&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="576375">SERVER-36293</key>
            <summary>file:WiredTiger.wt, connection: WiredTiger.turtle: encountered an illegal file format or internal value (after server crash)</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="birmjin">Birmjin In</reporter>
                        <labels>
                            <label>envns</label>
                            <label>rns</label>
                            <label>trct</label>
                            <label>wtc</label>
                    </labels>
                <created>Thu, 26 Jul 2018 01:39:02 +0000</created>
                <updated>Mon, 30 Jul 2018 15:33:06 +0000</updated>
                            <resolved>Thu, 26 Jul 2018 15:33:41 +0000</resolved>
                                    <version>3.6.4</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1957426" author="nick.brewer" created="Thu, 26 Jul 2018 14:57:36 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=birmjin&quot; class=&quot;user-hover&quot; rel=&quot;birmjin&quot;&gt;birmjin&lt;/a&gt; It looks like the &lt;tt&gt;WiredTiger.turtle&lt;/tt&gt; file you&apos;ve uploaded is badly corrupted - this file contains the metadata that is used to interpret &lt;tt&gt;WiredTiger.wt&lt;/tt&gt;, which is in turn used to interpret all other &lt;tt&gt;.wt&lt;/tt&gt; files. With that file in its current state, any repair attempts we make are going to be unsuccessful.  &lt;/p&gt;

&lt;p&gt;In this situation, our best recommendation would be to &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;resync the affected node&lt;/a&gt; if it is a replica set member, or &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;restore from a backup&lt;/a&gt; if one is available.&lt;/p&gt;

&lt;p&gt;Some guidelines for avoiding issues related to unreliable storage layers or server failures:&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;Regards,&lt;br/&gt;
Nick&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="192671" name="WiredTiger.tar.gz" size="4801" author="birmjin" created="Thu, 26 Jul 2018 01:31:04 +0000"/>
                            <attachment id="192670" name="mongod.log.zip" size="18109" author="birmjin" created="Thu, 26 Jul 2018 01:38:42 +0000"/>
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