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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-29358] Another WiredTiger.wt: encountered an illegal file format or internal value</title>
                <link>https://jira.mongodb.org/browse/SERVER-29358</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Running version:&lt;/p&gt;

&lt;p&gt;$ mongod --version&lt;br/&gt;
db version v3.2.10&lt;br/&gt;
git version: 79d9b3ab5ce20f51c272b4411202710a082d0317&lt;br/&gt;
OpenSSL version: OpenSSL 1.0.2j  26 Sep 2016&lt;br/&gt;
allocator: system&lt;br/&gt;
modules: none&lt;br/&gt;
build environment:&lt;br/&gt;
    distarch: x86_64&lt;br/&gt;
    target_arch: x86_64&lt;/p&gt;


&lt;p&gt;The server experienced an unexpected shutdown and since I cannot get mongo to run, I get the following output:&lt;/p&gt;

&lt;p&gt;2017-05-24T10:58:34.183-0700 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; wiredtiger_open config: create,cache_size=37G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),&lt;br/&gt;
2017-05-24T10:58:34.184-0700 E STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; WiredTiger (0) &lt;span class=&quot;error&quot;&gt;&amp;#91;1495648714:184033&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;44975:0x7fff75d69000&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;, connection: read checksum error for 4096B block at offset 24576: block header checksum of 3070115156 doesn&apos;t match expected checksum of 2589322872&lt;br/&gt;
2017-05-24T10:58:34.184-0700 E STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; WiredTiger (0) &lt;span class=&quot;error&quot;&gt;&amp;#91;1495648714:184064&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;44975:0x7fff75d69000&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;, connection: WiredTiger.wt: encountered an illegal file format or internal value&lt;br/&gt;
2017-05-24T10:58:34.184-0700 E STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; WiredTiger (-31804) &lt;span class=&quot;error&quot;&gt;&amp;#91;1495648714:184081&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;44975:0x7fff75d69000&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;, connection: the process must exit and restart: WT_PANIC: WiredTiger library panic&lt;br/&gt;
2017-05-24T10:58:34.184-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; Fatal Assertion 28558&lt;/p&gt;


&lt;p&gt;I have tried with --repair to no avail and I could not find any other instructions on how to recover this collection. Please advise.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="386574">SERVER-29358</key>
            <summary>Another WiredTiger.wt: encountered an illegal file format or internal value</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="tannerezell">Tanner Ezell</reporter>
                        <labels>
                            <label>envns</label>
                            <label>rpo</label>
                            <label>rps</label>
                            <label>trcf</label>
                            <label>wtc</label>
                    </labels>
                <created>Wed, 24 May 2017 18:00:38 +0000</created>
                <updated>Fri, 27 Jul 2018 18:26:43 +0000</updated>
                            <resolved>Fri, 9 Jun 2017 18:07:40 +0000</resolved>
                                    <version>3.2.10</version>
                                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1593251" author="thomas.schubert" created="Fri, 9 Jun 2017 18:07:40 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tannerezell&quot; class=&quot;user-hover&quot; rel=&quot;tannerezell&quot;&gt;tannerezell&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We haven&#8217;t heard back from you for some time, so I&#8217;m going to mark this ticket as resolved. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1579508" author="mark.agarunov" created="Wed, 24 May 2017 21:56:29 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tannerezell&quot; class=&quot;user-hover&quot; rel=&quot;tannerezell&quot;&gt;tannerezell&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for providing this information. If possible, could you provide the complete logs from MongoDB when this issue occurs? The additional information may help shed some light on the best approach for this issue.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                            <comment id="1579372" author="tannerezell" created="Wed, 24 May 2017 19:56:34 +0000"  >&lt;p&gt;Hello Mark,&lt;/p&gt;

&lt;p&gt;Thank you for your help, I have loaded the files and was able to run a repair. However, one of the collection is missing, filename collection-6--7108862593159262418.wt. Is there a way to restore this collection? I have both the file and the index of it.&lt;/p&gt;

&lt;p&gt;1. Local storage, SSD,&lt;br/&gt;
3. Yes&lt;br/&gt;
4. No&lt;br/&gt;
6. No backups or restores of this database have happened yet&lt;/p&gt;

&lt;p&gt;Regards&lt;/p&gt;</comment>
                            <comment id="1579345" author="mark.agarunov" created="Wed, 24 May 2017 19:32:38 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tannerezell&quot; class=&quot;user-hover&quot; rel=&quot;tannerezell&quot;&gt;tannerezell&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="156926" name="WiredTiger.turtle" size="954" author="tannerezell" created="Wed, 24 May 2017 18:00:00 +0000"/>
                            <attachment id="156929" name="WiredTiger.wt" size="40960" author="tannerezell" created="Wed, 24 May 2017 18:00:00 +0000"/>
                            <attachment id="156938" name="repair-SERVER-29358.tar.gz" size="1843" author="mark.agarunov" created="Wed, 24 May 2017 19:32:34 +0000"/>
                            <attachment id="156928" name="sizeStorer.wt" size="36864" author="tannerezell" created="Wed, 24 May 2017 18:00:00 +0000"/>
                            <attachment id="156927" name="storage.bson" size="95" author="tannerezell" created="Wed, 24 May 2017 18:00:00 +0000"/>
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