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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-34987] Unable to start standalone MongoDB instance due to checksum mismatch in WiredTiger storage engine</title>
                <link>https://jira.mongodb.org/browse/SERVER-34987</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I have a standalone MongoDB instance. It was working fine till today. When I tried to restart the DB, I am getting error saying there is a checksum mismatch in the WiredTiger.wt file. I dont know the exact reason as to why the data got corrupted.&#160;&lt;/p&gt;

&lt;p&gt;&#160;I tried to repair the DB but to no avail. I am getting the same error. I also tried the wiredtiger tool at&#160;&lt;a href=&quot;http://source.wiredtiger.com/3.0.0/command_line.html.&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://source.wiredtiger.com/3.0.0/command_line.html.&lt;/a&gt;&#160;But it is also giving the same error.&lt;/p&gt;

&lt;p&gt;It seems there are a lot of such corruption issues and it was being said that the issue would not occur post 3.2 version. I am having 3.4.0 version and still getting the issue.&lt;/p&gt;

&lt;p&gt;I am attaching the required files and any help to recover the data would be deeply appreciated.&lt;/p&gt;

&lt;p&gt;Please feel free to ask me anything else that would be required.&lt;/p&gt;

&lt;p&gt;Please find below the errors (IT IS GIVING DIFFERENT&#160;&lt;font color=&quot;#ff0000&quot;&gt;CHECKSUMS&lt;/font&gt;&#160;AT DIFFERENT TIME OF RESTART EVEN THOUGH NOTHING IN THE DB HAS BEEN CHANGED) -&lt;/p&gt;

&lt;p&gt;1ST TIME OF RESTART&lt;/p&gt;

&lt;p&gt;2018-05-13T17:03:39.809+0530 I STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;wiredtiger_open config: create,cache_size=3313M,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;
2018-05-13T17:03:39.830+0530 E STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;WiredTiger error (0)&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;1526211219:830804&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;593:0x7f97fc28dc80&amp;#93;&lt;/span&gt;,&#160;&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:&#160;&lt;font color=&quot;#d04437&quot;&gt;block header checksum of 1793761607 doesn&apos;t match expected checksum of 3070115156&lt;/font&gt;&lt;br/&gt;
2018-05-13T17:03:39.830+0530 E STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;WiredTiger error (0)&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;1526211219:830842&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;593:0x7f97fc28dc80&amp;#93;&lt;/span&gt;,&#160;&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;
2018-05-13T17:03:39.830+0530 E STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;WiredTiger error (-31804)&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;1526211219:830860&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;593:0x7f97fc28dc80&amp;#93;&lt;/span&gt;,&#160;&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;
2018-05-13T17:03:39.830+0530 I -&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;Fatal Assertion 28558 at src/mongo/db/storage/wiredtiger/wiredtiger_util.cpp 361&lt;br/&gt;
2018-05-13T17:03:39.830+0530 I -&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;***aborting after fassert() failure&lt;/p&gt;

&lt;p&gt;2018-05-13T17:03:39.850+0530 F -&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;Got signal: 6 (Aborted).&lt;/p&gt;

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

&lt;p&gt;2ND TIME OF RESTART&lt;/p&gt;

&lt;p&gt;2018-05-13T23:03:29.765+0530 I STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;wiredtiger_open config: create,cache_size=3313M,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;
2018-05-13T23:03:29.785+0530 E STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;WiredTiger error (0)&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;1526232809:785143&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;20203:0x7f32ca8fbc80&amp;#93;&lt;/span&gt;,&#160;&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:&#160;&lt;font color=&quot;#d04437&quot;&gt;block header checksum of 1793761607 doesn&apos;t match expected checksum of 1666091971&lt;/font&gt;&lt;br/&gt;
2018-05-13T23:03:29.785+0530 E STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;WiredTiger error (0)&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;1526232809:785225&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;20203:0x7f32ca8fbc80&amp;#93;&lt;/span&gt;,&#160;&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;
2018-05-13T23:03:29.785+0530 E STORAGE&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;WiredTiger error (-31804)&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;1526232809:785278&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;20203:0x7f32ca8fbc80&amp;#93;&lt;/span&gt;,&#160;&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;
2018-05-13T23:03:29.785+0530 I -&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;Fatal Assertion 28558 at src/mongo/db/storage/wiredtiger/wiredtiger_util.cpp 361&lt;br/&gt;
2018-05-13T23:03:29.785+0530 I -&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;***aborting after fassert() failure&lt;/p&gt;

&lt;p&gt;2018-05-13T23:03:29.806+0530 F -&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&#160;Got signal: 6 (Aborted).&lt;/p&gt;</description>
                <environment></environment>
        <key id="543651">SERVER-34987</key>
            <summary>Unable to start standalone MongoDB instance due to checksum mismatch in WiredTiger storage engine</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="3">Duplicate</resolution>
                                        <assignee username="kelsey.schubert@mongodb.com">Kelsey Schubert</assignee>
                                    <reporter username="devapplicate@gmail.com">Dev</reporter>
                        <labels>
                    </labels>
                <created>Mon, 14 May 2018 18:43:36 +0000</created>
                <updated>Mon, 14 May 2018 18:48:11 +0000</updated>
                            <resolved>Mon, 14 May 2018 18:48:01 +0000</resolved>
                                    <version>3.4.0</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                    <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="543199">SERVER-34972</issuekey>
        </issuelink>
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