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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-61205] WiredTiger.wt, connection: read checksum error for 4096B block at offset 53248: block header checksum doesn&apos;t match expected checksum</title>
                <link>https://jira.mongodb.org/browse/SERVER-61205</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi&lt;/p&gt;

&lt;p&gt;we are unable to restart mongod instance after system reboot.&lt;/p&gt;

&lt;p&gt;we follow the notice, try use&#160;--repair to repair some files.&lt;/p&gt;

&lt;p&gt;but after that, mongod launch success, but database was disppeared&lt;/p&gt;

&lt;p&gt;one more file was create,&#160;WiredTiger.wt.orig&lt;/p&gt;

&lt;p&gt;mongodb&#160;v4.4.1&lt;/p&gt;</description>
                <environment></environment>
        <key id="1916886">SERVER-61205</key>
            <summary>WiredTiger.wt, connection: read checksum error for 4096B block at offset 53248: block header checksum doesn&apos;t match expected checksum</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="edwin.zhou@mongodb.com">Edwin Zhou</assignee>
                                    <reporter username="vincent.manest@gmail.com">Vincent Man</reporter>
                        <labels>
                    </labels>
                <created>Wed, 3 Nov 2021 07:35:57 +0000</created>
                <updated>Mon, 29 Nov 2021 15:46:24 +0000</updated>
                            <resolved>Mon, 29 Nov 2021 15:46:24 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4214781" author="JIRAUSER1257066" created="Mon, 29 Nov 2021 15:46:24 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=vincent.manest%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;vincent.manest@gmail.com&quot;&gt;vincent.manest@gmail.com&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 close this ticket. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="4198482" author="JIRAUSER1257066" created="Thu, 18 Nov 2021 17:42:58 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=vincent.manest%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;vincent.manest@gmail.com&quot;&gt;vincent.manest@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We still need additional information to diagnose the problem. If this is still an issue for you, would you please let us know if you were able to make a complete copy of the database&apos;s $dbpath directory to safeguard so that you can work off of the current $dbpath? Depending on the state of your backup, we may be able to attempt a metadata repair on the files on your backup files.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="4167891" author="JIRAUSER1257066" created="Wed, 3 Nov 2021 19:47:02 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=dario.desimone%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;dario.desimone@gmail.com&quot;&gt;dario.desimone@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;This error message leads us to suspect some form of corruption. Prior to running &lt;tt&gt;&amp;#45;&amp;#45;repair&lt;/tt&gt;, were you able to make a complete copy of the database&apos;s $dbpath directory to safeguard so that you can work off of the current $dbpath?&lt;/p&gt;

&lt;p&gt;The ideal resolution is to perform a clean &lt;a href=&quot;https://docs.mongodb.org/manual/tutorial/resync-replica-set-member/#automatically-sync-a-member&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;resync&lt;/a&gt; from an unaffected node. &lt;/p&gt;

&lt;p&gt;Given your provided metadata files, I&apos;ve attempted a metadata-only repair effort using internal tools. Unfortunately this attempt failed and we&apos;re unable to repair this corruption.&lt;/p&gt;

&lt;p&gt;To avoid a problem like this in the future, it is our strong recommendation to:&lt;/p&gt;
&lt;ul&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;.&lt;/li&gt;
	&lt;li&gt;Use 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;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;.&lt;/li&gt;
	&lt;li&gt;Have a process in place to restore backups.&lt;/li&gt;
	&lt;li&gt;Follow all &lt;a href=&quot;https://docs.mongodb.com/manual/administration/production-notes/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;production notes&lt;/a&gt;, especially those for &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 systems&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;Never manipulate the underlying database files in any way.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="343787" name="WiredTiger.turtle" size="1257" author="vincent.manest@gmail.com" created="Wed, 3 Nov 2021 07:34:47 +0000"/>
                            <attachment id="343786" name="WiredTiger.wt" size="81920" author="vincent.manest@gmail.com" created="Wed, 3 Nov 2021 07:34:48 +0000"/>
                            <attachment id="343785" name="WiredTiger.wt.orig" size="1228800" author="vincent.manest@gmail.com" created="Wed, 3 Nov 2021 07:34:49 +0000"/>
                            <attachment id="343788" name="mongodb-1.log" size="207480" author="vincent.manest@gmail.com" created="Wed, 3 Nov 2021 07:34:48 +0000"/>
                            <attachment id="343789" name="mongodb.log" size="207480" author="vincent.manest@gmail.com" created="Wed, 3 Nov 2021 07:09:37 +0000"/>
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