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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-33036] file:WiredTiger.wt read checksum error, mongodb won&apos;t start</title>
                <link>https://jira.mongodb.org/browse/SERVER-33036</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi,&lt;br/&gt;
I&apos;ve a problem with mongodb. I stop the service and I wasn&apos;t able to start it again.&lt;br/&gt;
When I try to start I&apos;ve the following errors like attached image&lt;/p&gt;

&lt;p&gt;Could you please help to recover my database, it&apos;s very important.&lt;br/&gt;
I attached two file where I think is the problem.&lt;/p&gt;</description>
                <environment></environment>
        <key id="490110">SERVER-33036</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="mark.agarunov">Mark Agarunov</assignee>
                                    <reporter username="alexdr">Aleksandr</reporter>
                        <labels>
                    </labels>
                <created>Wed, 31 Jan 2018 08:56:39 +0000</created>
                <updated>Thu, 22 Feb 2018 22:27:11 +0000</updated>
                            <resolved>Thu, 1 Feb 2018 17:00:54 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1791979" author="mark.agarunov" created="Thu, 1 Feb 2018 17:00:54 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=alexdr&quot; class=&quot;user-hover&quot; rel=&quot;alexdr&quot;&gt;alexdr&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for your response. I&apos;m glad to hear that this fixed the issue and everything is working again. To prevent this type of problem in the future please take note of the following guidelines to help mitigate any 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;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                            <comment id="1791526" author="alexdr" created="Thu, 1 Feb 2018 08:02:49 +0000"  >&lt;p&gt;It&apos;s work fine&lt;/p&gt;</comment>
                            <comment id="1790910" author="mark.agarunov" created="Wed, 31 Jan 2018 18:37:41 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=alexdr&quot; class=&quot;user-hover&quot; rel=&quot;alexdr&quot;&gt;alexdr&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for your report. I&apos;ve attached a repair attempt of the files you provided. 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 the affected node(s) so that we can further investigate.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
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                            <attachment id="177384" name="4zWEiZ0BTi2a6bqQ8ZkKJw.png" size="145123" author="alexdr" created="Wed, 31 Jan 2018 08:54:37 +0000"/>
                            <attachment id="177382" name="WiredTiger.turtle" size="1008" author="alexdr" created="Wed, 31 Jan 2018 08:55:31 +0000"/>
                            <attachment id="177383" name="WiredTiger.wt" size="86016" author="alexdr" created="Wed, 31 Jan 2018 08:55:31 +0000"/>
                            <attachment id="177442" name="repair-SERVER-33036.tar.gz" size="4106" author="mark.agarunov" created="Wed, 31 Jan 2018 18:37:12 +0000"/>
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