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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>
    </build-info>


<item>
            <title>[SERVER-32152] read checksum error Wiredtiger.wt</title>
                <link>https://jira.mongodb.org/browse/SERVER-32152</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi, &lt;/p&gt;

&lt;p&gt;I had a server crash and since then I am unable to restart my mongod service with the error:&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;
		&lt;tbody &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-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;2017-12-02T10:35:21.780+0100 E STORAGE  [initandlisten] WiredTiger error (0) [1512207321:780192][6685:0x7f45f2800d40], file:WiredTiger.wt, connection: read checksum error for 4096B block at offset 655&lt;/span&gt;&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;   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;36: block header checksum of 1952542066 doesn&apos;t match expected checksum of 1991159358&lt;/span&gt;&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;   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;2017-12-02T10:35:21.780+0100 E STORAGE  [initandlisten] WiredTiger error (0) [1512207321:780241][6685:0x7f45f2800d40], file:WiredTiger.wt, connection: WiredTiger.wt: encountered an illegal file format&lt;/span&gt;&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;   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; or internal value&lt;/span&gt;&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;   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;2017-12-02T10:35:21.780+0100 E STORAGE  [initandlisten] WiredTiger error (-31804) [1512207321:780253][6685:0x7f45f2800d40], file:WiredTiger.wt, connection: the process must exit and restart: WT_PANIC:&lt;/span&gt;&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;   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; WiredTiger library panic&lt;/span&gt;&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;   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;2017-12-02T10:35:21.780+0100 I -        [initandlisten] Fatal Assertion 28558 at src/mongo/db/storage/wiredtiger/wiredtiger_util.cpp 361&lt;/span&gt;&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;   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;2017-12-02T10:35:21.780+0100 I -        [initandlisten]&lt;/span&gt;&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;   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;   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;***aborting after fassert() failure&lt;/span&gt;&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;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;What is weird, that Wiredtiger.turtle doesn&apos;t have a readable format like my other servers.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Michael&lt;/p&gt;
</description>
                <environment></environment>
        <key id="467305">SERVER-32152</key>
            <summary>read checksum error Wiredtiger.wt</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="9">Done</resolution>
                                        <assignee username="mark.agarunov">Mark Agarunov</assignee>
                                    <reporter username="mmdbs18">Michael D</reporter>
                        <labels>
                            <label>envm</label>
                            <label>rge</label>
                            <label>rpu</label>
                            <label>trct</label>
                            <label>wtc</label>
                    </labels>
                <created>Sat, 2 Dec 2017 11:38:27 +0000</created>
                <updated>Fri, 27 Jul 2018 17:21:21 +0000</updated>
                            <resolved>Thu, 7 Dec 2017 16:49:45 +0000</resolved>
                                    <version>3.4.1</version>
                                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1745559" author="mark.agarunov" created="Thu, 7 Dec 2017 16:49:34 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=mmdbs18&quot; class=&quot;user-hover&quot; rel=&quot;mmdbs18&quot;&gt;mmdbs18&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Unfortunately, this error indicates that there was corruption on the disk. In this situation, my best recommendation would be to &lt;a href=&quot;https://docs.mongodb.com/manual/tutorial/resync-replica-set-member/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;resync the affected node&lt;/a&gt; or &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;restore from a backup&lt;/a&gt; if possible.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                            <comment id="1745149" author="mmdbs18" created="Thu, 7 Dec 2017 08:10:38 +0000"  >&lt;p&gt;Hi Mark,&lt;/p&gt;

&lt;p&gt;Thanks for the files. I replaced the files and it didn&apos;t work. I attached the full log.&lt;/p&gt;

&lt;p&gt;The answers to your questions:&lt;/p&gt;

&lt;p&gt;1) It is a RAID 10 SSD volume for a VM&lt;br/&gt;
2) All looks good&lt;br/&gt;
3) Yes&lt;br/&gt;
4) No&lt;br/&gt;
5) No&lt;br/&gt;
6) As this is still a pre prod system we have only started building up the replication nodes to then take backups from those.&lt;br/&gt;
7) A week before the crash. The system ran out of memory. After a restart we had problems starting the mongod process.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Michael &lt;/p&gt;</comment>
                            <comment id="1741678" author="mark.agarunov" created="Mon, 4 Dec 2017 17:16:01 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=mmdbs18&quot; class=&quot;user-hover&quot; rel=&quot;mmdbs18&quot;&gt;mmdbs18&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="172211" name="WiredTiger.turtle" size="962" author="mmdbs18" created="Sat, 2 Dec 2017 11:36:23 +0000"/>
                            <attachment id="172212" name="WiredTiger.wt" size="139264" author="mmdbs18" created="Sat, 2 Dec 2017 11:36:24 +0000"/>
                            <attachment id="172582" name="rep2.log" size="8293" author="mmdbs18" created="Thu, 7 Dec 2017 08:10:50 +0000"/>
                            <attachment id="172300" name="repair-SERVER-32152.tar.gz" size="8279" author="mark.agarunov" created="Mon, 4 Dec 2017 17:15:52 +0000"/>
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