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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-25285] file:WiredTiger.wt read checksum error, mongodb won&apos;t start</title>
                <link>https://jira.mongodb.org/browse/SERVER-25285</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi all,&lt;br/&gt;
I have to repair a mongodb-Setup. After a raid issue the server crashed. I tried to --repair but I got&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-07-26T09:04:23.280+0200 E STORAGE  [initandlisten] WiredTiger (0) [1469516663:280195][5673:0x7faad17ebc80], file:WiredTiger.wt, WT_CURSOR.search_near: read checksum error for 16384B block at offset 45056: calculated block checksum of 562858221 doesn&apos;t match expected checksum of 3119024118&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-07-26T09:04:23.280+0200 E STORAGE  [initandlisten] WiredTiger (0) [1469516663:280299][5673:0x7faad17ebc80], file:WiredTiger.wt, WT_CURSOR.search_near: WiredTiger.wt: encountered an illegal file format or internal value&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-07-26T09:04:23.280+0200 E STORAGE  [initandlisten] WiredTiger (-31804) [1469516663:280318][5673:0x7faad17ebc80], file:WiredTiger.wt, WT_CURSOR.search_near: the process must exit and restart: WT_PANIC: WiredTiger library panic&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;So I tried to recover using the wt-Tools, (described here: &lt;a href=&quot;http://www.alexbevi.com/blog/2016/02/10/recovering-a-wiredtiger-collection-from-a-corrupt-mongodb-installation/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.alexbevi.com/blog/2016/02/10/recovering-a-wiredtiger-collection-from-a-corrupt-mongodb-installation/&lt;/a&gt;) but still, I got the same error. Every command used wit wt tools gives me the same.&lt;br/&gt;
So now, I have no idea how to repair that file. Since everyone sends you files, I put the WiredTiger.wt into the Attachment box.&lt;/p&gt;

&lt;p&gt;Helps and hints are very much appreciated,&lt;br/&gt;
regards,&lt;br/&gt;
jm&lt;/p&gt;</description>
                <environment></environment>
        <key id="304122">SERVER-25285</key>
            <summary>file:WiredTiger.wt read checksum error, mongodb won&apos;t start</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="kelsey.schubert@mongodb.com">Kelsey Schubert</assignee>
                                    <reporter username="jm@mpex.de">Joern Merkel</reporter>
                        <labels>
                            <label>envns</label>
                            <label>rdi</label>
                            <label>rps</label>
                            <label>trcf</label>
                            <label>wtc</label>
                    </labels>
                <created>Tue, 26 Jul 2016 15:53:15 +0000</created>
                <updated>Tue, 14 Aug 2018 18:41:03 +0000</updated>
                            <resolved>Fri, 29 Jul 2016 18:09:43 +0000</resolved>
                                    <version>3.2.1</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1613271" author="thomas.schubert" created="Tue, 4 Jul 2017 03:39:06 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ccornel&quot; class=&quot;user-hover&quot; rel=&quot;ccornel&quot;&gt;ccornel&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for reporting this issue, so we can best address the issue that you&apos;ve encountered. Would you please open a new ticket and attach the files there? Please be sure to include the version of MongoDB, the log message describing the failure, and a description of the events (e.g. power failure) preceding the corruption?&lt;/p&gt;

&lt;p&gt;Thanks again,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1613196" author="ccornel" created="Mon, 3 Jul 2017 21:52:38 +0000"  >&lt;p&gt;Hi   &lt;/p&gt;


&lt;p&gt;Watching this forum, I have reviewed that I have the same problem described here. And I could not give you a solution, I wanted to ask if you could see my files and be able to repair the error.&lt;/p&gt;

&lt;p&gt;Thank you  , regards.&lt;br/&gt;
Carlos&#8195;&lt;a href=&quot;https://drive.google.com/drive/folders/0BwyEAdclOsc_X0Nfa3RRd3RMT0k&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://drive.google.com/drive/folders/0BwyEAdclOsc_X0Nfa3RRd3RMT0k&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1341629" author="thomas.schubert" created="Fri, 29 Jul 2016 18:09:43 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jm%40mpex.de&quot; class=&quot;user-hover&quot; rel=&quot;jm@mpex.de&quot;&gt;jm@mpex.de&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I&apos;m glad you were able to salvage the other collection files. WiredTiger.wt contains essential metadata for interpreting other .wt files. Unfortunately, the current process to repair these files is not ready for public consumption. &lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19815&quot; title=&quot;Improved mongod --repair option for WiredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19815&quot;&gt;&lt;del&gt;SERVER-19815&lt;/del&gt;&lt;/a&gt; tracks improvements make make repair more robust with WiredTiger files. Please feel free to vote for it and watch it for updates.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1339621" author="jm@mpex.de" created="Thu, 28 Jul 2016 13:28:24 +0000"  >&lt;p&gt;Hi Thomas,&lt;/p&gt;

&lt;p&gt;thanks for repairing. Now I was able to salavage the other collection-files.&lt;br/&gt;
Now, could you comment what you did on this file or what metadata was in it?&lt;/p&gt;

&lt;p&gt;best regards,&lt;br/&gt;
JM&lt;/p&gt;</comment>
                            <comment id="1337826" author="thomas.schubert" created="Wed, 27 Jul 2016 16:49:39 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jm%40mpex.de&quot; class=&quot;user-hover&quot; rel=&quot;jm@mpex.de&quot;&gt;jm@mpex.de&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I&apos;ve attached the &lt;tt&gt;repair-attempt.tar&lt;/tt&gt; containing the WiredTiger.wt and WiredTiger.turtle after a repair attempt. Please extract them in your dbpath and try starting mongod.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1336231" author="jm@mpex.de" created="Tue, 26 Jul 2016 16:06:20 +0000"  >&lt;p&gt;Hi Ramon,&lt;/p&gt;

&lt;p&gt;of course, I attached it as well. well, the process did nothing as the error was the same as with mongodb --repair. After that it was the same.&lt;br/&gt;
Thanks for your quck response.&lt;br/&gt;
Regards,&lt;br/&gt;
JM&lt;/p&gt;</comment>
                            <comment id="1336220" author="ramon.fernandez" created="Tue, 26 Jul 2016 16:02:44 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jm%40mpex.de&quot; class=&quot;user-hover&quot; rel=&quot;jm@mpex.de&quot;&gt;jm@mpex.de&lt;/a&gt;, for us to attempt a repair we&apos;ll also need the &lt;tt&gt;WiredTiger.turtle&lt;/tt&gt; file, can you please upload it as well?&lt;/p&gt;

&lt;p&gt;Please note there are no guarantees here, as I can&apos;t vouch for the process described in the link you sent.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
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                <attachments>
                            <attachment id="132543" name="WiredTiger.turtle" size="948" author="jm@mpex.de" created="Tue, 26 Jul 2016 16:04:55 +0000"/>
                            <attachment id="132538" name="WiredTiger.wt" size="61440" author="jm@mpex.de" created="Tue, 26 Jul 2016 15:53:16 +0000"/>
                            <attachment id="132698" name="repair-attempt.tar" size="2239" author="kelsey.schubert@mongodb.com" created="Wed, 27 Jul 2016 16:49:39 +0000"/>
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