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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-24973] WiredTiger library panic</title>
                <link>https://jira.mongodb.org/browse/SERVER-24973</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Primary mongod crashed with a &quot;WiredTiger library panic&quot; error.&lt;/p&gt;

&lt;p&gt;Setup consist of 3 nodes (1x Primary, 2x Secondary). Operating system is CentOS 6.7 (x86_64). Machines have 16 CPU cores and 60 GB RAM, WiredTiger cache size is 32 GB.&lt;/p&gt;

&lt;p&gt;Attachments: crash log, mongod config and stats of affected collection.&lt;/p&gt;

</description>
                <environment></environment>
        <key id="299918">SERVER-24973</key>
            <summary>WiredTiger library panic</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="-1">Unassigned</assignee>
                                    <reporter username="skutzke">Stefan Kutzke</reporter>
                        <labels>
                            <label>envns</label>
                            <label>rdi</label>
                            <label>wtc</label>
                    </labels>
                <created>Mon, 11 Jul 2016 06:52:25 +0000</created>
                <updated>Tue, 14 Aug 2018 14:21:32 +0000</updated>
                            <resolved>Mon, 11 Jul 2016 13:33:14 +0000</resolved>
                                    <version>3.0.9</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1319852" author="thomas.schubert" created="Mon, 11 Jul 2016 13:33:14 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=skutzke&quot; class=&quot;user-hover&quot; rel=&quot;skutzke&quot;&gt;skutzke&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for clarifying that there was a disk failure in your storage layer. Since you have been able to successfully restore your database, I will close this ticket.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1319726" author="skutzke" created="Mon, 11 Jul 2016 11:35:28 +0000"  >&lt;p&gt;Hi Ramon,&lt;br/&gt;
you are right. In the meantime I have found out that there was a disk failure in the underlaying RAID5 storage.&lt;br/&gt;
I restored the complete database and therefore did not try running validate().&lt;br/&gt;
Thank you for your prompt response.&lt;br/&gt;
Stefan&lt;/p&gt;</comment>
                            <comment id="1319716" author="ramon.fernandez" created="Mon, 11 Jul 2016 11:14:29 +0000"  >&lt;p&gt;Below are the first lines for the log file above for convenience:&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;2016-07-09T05:05:54.765+0200 E STORAGE  [conn120402] WiredTiger (0) [1468033554:765166][6134:0x7f7b360de700], file:backend/collection/49--8667964377448587020.wt, cursor.search: read checksum error for 12288B block at offset 60156526592: calculated block checksum of 1384899899 doesn&apos;t match expected checksum of 3706134454&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;2016-07-09T05:05:54.765+0200 E STORAGE  [conn120402] WiredTiger (0) [1468033554:765280][6134:0x7f7b360de700], file:backend/collection/49--8667964377448587020.wt, cursor.search: backend/collection/49--8667964377448587020.wt: encountered an illegal file format 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;   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;2016-07-09T05:05:54.765+0200 E STORAGE  [conn120402] WiredTiger (-31804) [1468033554:765314][6134:0x7f7b360de700], file:backend/collection/49--8667964377448587020.wt, cursor.search: the process must exit and restart: WT_PANIC: WiredTiger library panic&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;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=skutzke&quot; class=&quot;user-hover&quot; rel=&quot;skutzke&quot;&gt;skutzke&lt;/a&gt;, these errors indicate that MongoDB has found data corruption on your files, and is terminating to avoid any other damage. This type of corruption is often cause by a faulty storage layer, so I&apos;d recommend you check the integrity of your disks.&lt;/p&gt;

&lt;p&gt;Have you tried running &lt;a href=&quot;https://docs.mongodb.com/manual/reference/method/db.collection.validate/#db.collection.validate&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;validate()&lt;/tt&gt;&lt;/a&gt; on this collection?&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="130194" name="crash.log" size="6531" author="skutzke" created="Mon, 11 Jul 2016 06:52:25 +0000"/>
                            <attachment id="130195" name="mongod.conf" size="668" author="skutzke" created="Mon, 11 Jul 2016 06:52:25 +0000"/>
                            <attachment id="130196" name="stats_affected_collection" size="5240" author="skutzke" created="Mon, 11 Jul 2016 06:52:25 +0000"/>
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