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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-28866] WiredTiger.wt read checksum error</title>
                <link>https://jira.mongodb.org/browse/SERVER-28866</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I am attempting to repair a corrupted db, but --repair doesn&apos;t work. I have also tried salvage with the wt tool. These are the errors:&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;1492617550:380374&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;16669:0x7f734860e700&amp;#93;&lt;/span&gt;, &lt;a href=&quot;file:WiredTiger.wt&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;file:WiredTiger.wt&lt;/a&gt;, WT_CURSOR.search_near: read checksum error for 24576B block at offset 86016: block header checksum of 2175661310 doesn&apos;t match expected checksum of 1235721632&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;1492617550:380401&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;16669:0x7f734860e700&amp;#93;&lt;/span&gt;, &lt;a href=&quot;file:WiredTiger.wt&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;file:WiredTiger.wt&lt;/a&gt;, WT_CURSOR.search_near: WiredTiger.wt: encountered an illegal file format or internal value&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;1492617550:380406&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;16669:0x7f734860e700&amp;#93;&lt;/span&gt;, &lt;a href=&quot;file:WiredTiger.wt&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;file:WiredTiger.wt&lt;/a&gt;, WT_CURSOR.search_near: the process must exit and restart: WT_PANIC: WiredTiger library panic&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;1492617550:380412&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;16669:0x7f734860e700&amp;#93;&lt;/span&gt;, txn-recover: Recovery failed: WT_PANIC: WiredTiger library panic&lt;/p&gt;

&lt;p&gt;lt-wt: WT_PANIC: WiredTiger library panic&lt;/p&gt;

&lt;p&gt;I have attached WiredTiger.wt and WiredTiger.turtle. Any help would be appreciated.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Adam&lt;/p&gt;</description>
                <environment></environment>
        <key id="375498">SERVER-28866</key>
            <summary>WiredTiger.wt read checksum error</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="mark.agarunov">Mark Agarunov</assignee>
                                    <reporter username="apetschke">Adam Petschke</reporter>
                        <labels>
                            <label>envns</label>
                            <label>rns</label>
                            <label>rps</label>
                            <label>trcf</label>
                            <label>wtc</label>
                    </labels>
                <created>Wed, 19 Apr 2017 16:11:10 +0000</created>
                <updated>Tue, 14 Aug 2018 18:37:58 +0000</updated>
                            <resolved>Thu, 20 Apr 2017 16:48:50 +0000</resolved>
                                    <version>3.2.12</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1553079" author="apetschke" created="Wed, 19 Apr 2017 20:48:49 +0000"  >&lt;p&gt;Hi Mark,&lt;/p&gt;

&lt;p&gt;Yes, this did resolve the issue we were having.&lt;/p&gt;

&lt;p&gt;Thank you very much for the quick reply.&lt;/p&gt;

&lt;p&gt;-Adam&lt;/p&gt;</comment>
                            <comment id="1552777" author="mark.agarunov" created="Wed, 19 Apr 2017 17:14:51 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=apetschke&quot; class=&quot;user-hover&quot; rel=&quot;apetschke&quot;&gt;apetschke&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for the report. I&apos;ve attached a repair attempt of the files you&apos;ve provided. Would you please extract these files and replace them in your &lt;tt&gt;$dbpath&lt;/tt&gt; and let us know if it resolves the issue? If you are still seeing errors after replacing these files, please provide the complete logs from mongod so that we can further investigate. Additionally, if this issue persists, please provide the following information:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;What kind of underlying storage mechanism are you using? Are the storage devices attached locally or over the network? Are the disks SSDs or HDDs? What kind of RAID and/or volume management system are you using?&lt;/li&gt;
	&lt;li&gt;Would you please check the integrity of your disks?&lt;/li&gt;
	&lt;li&gt;Has the database always been running this version of MongoDB? If not please describe the upgrade/downgrade cycles the database has been through.&lt;/li&gt;
	&lt;li&gt;Have you manipulated (copied or moved) the underlying database files? If so, was mongod running?&lt;/li&gt;
	&lt;li&gt;Have you ever restored this instance from backups?&lt;/li&gt;
	&lt;li&gt;What method do you use to create backups?&lt;/li&gt;
	&lt;li&gt;When was the underlying filesystem last checked and is it currently marked clean?&lt;/li&gt;
&lt;/ol&gt;



&lt;p&gt;Thanks, &lt;br/&gt;
Mark&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="154304" name="WiredTiger.turtle" size="962" author="apetschke" created="Wed, 19 Apr 2017 16:10:42 +0000"/>
                            <attachment id="154305" name="WiredTiger.wt" size="110592" author="apetschke" created="Wed, 19 Apr 2017 16:10:35 +0000"/>
                            <attachment id="154314" name="repair-SERVER-28866.tar.gz" size="4645" author="mark.agarunov" created="Wed, 19 Apr 2017 17:10:35 +0000"/>
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