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<channel>
    <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-26533] WiredTiger library panic</title>
                <link>https://jira.mongodb.org/browse/SERVER-26533</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A mongodb instance was unexpectedly closed in a replica set. I have to remove all data and start it in order to recover service as soon as possible. The log information as follow:&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] MongoDB starting : pid=16224 port=27017 dbpath=/data/mongodata/data 64-bit host=mongo01.log&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] db version v3.2.1&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] git version: a14d55980c2cdc565d4704a7e3ad37e4e535c1b2&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.1f 6 Jan 2014&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] allocator: tcmalloc&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] modules: none&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] build environment:&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten]     distmod: ubuntu1404&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten]     distarch: x86_64&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten]     target_arch: x86_64&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;2016-10-08T11:44:54.060+0800 I CONTROL  [initandlisten] options: { config: &quot;/etc/mongod.conf&quot;, net: { bindIp: &quot;0.0.0.0&quot;, port: 27017 }, replication: { replSet: &quot;foba&quot; }, security: { keyFile: &quot;/etc/mongodb-keyfile&quot; }, storage: { dbPath:&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;&quot;/data/mongodata/data&quot;, journal: { enabled: false } }, systemLog: { destination: &quot;file&quot;, logAppend: true, path: &quot;/data/mongodata/log/mongo.log&quot; } }&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;2016-10-08T11:44:54.092+0800 I -        [initandlisten] Detected data files in /data/mongodata/data created by the &apos;wiredTiger&apos; storage engine, so setting the active storage engine to &apos;wiredTiger&apos;.&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;2016-10-08T11:44:54.092+0800 W -        [initandlisten] Detected unclean shutdown - /data/mongodata/data/mongod.lock is not empty.&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;2016-10-08T11:44:54.092+0800 W STORAGE  [initandlisten] Recovering data from the last clean checkpoint.&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;2016-10-08T11:44:54.092+0800 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=2G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=s&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;nappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),,log=(enabled=false),&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;2016-10-08T11:44:54.951+0800 E STORAGE  [initandlisten] WiredTiger (22) [1475898294:951592][16224:0x7f94d0c5ad00], file:collection-155-6426631565121784140.wt, WT_SESSION.open_cursor: live.avail: merge range 28672-40960 overlaps with exi&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;sting range 28672-32768: Invalid argument&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;2016-10-08T11:44:54.951+0800 E STORAGE  [initandlisten] WiredTiger (-31804) [1475898294:951642][16224:0x7f94d0c5ad00], file:collection-155-6426631565121784140.wt, WT_SESSION.open_cursor: the process must exit and restart: WT_PANIC: Wire&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;dTiger 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;2016-10-08T11:44:54.951+0800 I -        [initandlisten] Fatal Assertion 28558&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;2016-10-08T11:44:54.951+0800 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;   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;2016-10-08T11:44:54.972+0800 F -        [initandlisten] Got signal: 6 (Aborted).&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;BTW: The version is v3.2.1.&lt;/p&gt;</description>
                <environment></environment>
        <key id="322200">SERVER-26533</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="4">Incomplete</resolution>
                                        <assignee username="kelsey.schubert@mongodb.com">Kelsey Schubert</assignee>
                                    <reporter username="shuowang">Shuo Wang</reporter>
                        <labels>
                            <label>envm</label>
                            <label>rge</label>
                            <label>wtc</label>
                    </labels>
                <created>Sat, 8 Oct 2016 07:12:49 +0000</created>
                <updated>Mon, 13 Aug 2018 21:44:35 +0000</updated>
                            <resolved>Thu, 13 Oct 2016 21:51:27 +0000</resolved>
                                    <version>3.2.1</version>
                                                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1482929" author="thomas.schubert" created="Mon, 23 Jan 2017 19:10:45 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=shuowang&quot; class=&quot;user-hover&quot; rel=&quot;shuowang&quot;&gt;shuowang&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Unfortunately, as Keith explained, there is no simple process to get the data from a particular block.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1477397" author="keith.bostic" created="Mon, 16 Jan 2017 15:49:38 +0000"  >&lt;blockquote&gt;&lt;p&gt;Is there any way to get data from 8192B block at offset 1312190464? I want to know which document corruption in the MongoDB&apos;s collection.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;I don&apos;t think there&apos;s any simple solution (although &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=anonymous.user&quot; class=&quot;user-hover&quot; rel=&quot;anonymous.user&quot;&gt;anonymous.user&lt;/a&gt; may have a better idea than I do).&lt;/p&gt;

&lt;p&gt;In short, documents are encoded BSON, so there may or may not be useful text there, second, documents are generally compressed using &lt;tt&gt;snappy&lt;/tt&gt;, and finally, if the block is truly corrupted, it may not be possible to decompress it.&lt;/p&gt;

&lt;p&gt;If the backing collection isn&apos;t compressed, I would suggest using a tool like &lt;tt&gt;hexdump&lt;/tt&gt; to display the contents of the block.&lt;/p&gt;

&lt;p&gt;If the backing collection is compressed, it&apos;s going to be harder to get the information. If you want to use &lt;tt&gt;dd&lt;/tt&gt; to copy out that 8192B block from the file and upload it into this ticket, I could try and crack it and let you know if I see anything useful.&lt;/p&gt;</comment>
                            <comment id="1477246" author="shuowang" created="Mon, 16 Jan 2017 07:01:18 +0000"  >&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;Is there any way to get data from 8192B block at offset 1312190464? I want to know which document corruption in the MongoDB&apos;s collection.&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;   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;read checksum error for 8192B block at offset 1312190464: calculated block checksum of 2510031984 doesn&apos;t match expected checksum of 193589556&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;Thanks&lt;/p&gt;</comment>
                            <comment id="1409680" author="alexander.gorrod" created="Sun, 16 Oct 2016 21:33:21 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=shuowang&quot; class=&quot;user-hover&quot; rel=&quot;shuowang&quot;&gt;shuowang&lt;/a&gt; The error leading to MongoDB shutting down was:&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;2016-10-15T01:50:51.168+0800 E STORAGE  [conn29728] WiredTiger (0) [1476467451:161860][16707:0x7f0cf8935700], file:collection-681-8812398166181733878.wt, WT_CURSOR.next: read checksum error for 8192B block at offset 1312190464: calculated block checksum of 2510031984 doesn&apos;t match expected checksum of 193589556&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;2016-10-15T01:50:51.168+0800 E STORAGE  [conn29728] WiredTiger (0) [1476467451:168136][16707:0x7f0cf8935700], file:collection-681-8812398166181733878.wt, WT_CURSOR.next: collection-681-8812398166181733878.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;2016-10-15T01:50:51.168+0800 E STORAGE  [conn29728] WiredTiger (-31804) [1476467451:168152][16707:0x7f0cf8935700], file:collection-681-8812398166181733878.wt, WT_CURSOR.next: 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;That error means WiredTiger (the storage engine for MongoDB) detected that there was a disk corruption affecting the database. Is it possible that your underlying storage system is unreliable? I recommend running integrity checks on your hardware to look for problems.&lt;/p&gt;

&lt;p&gt;When MongoDB detects an on-disk data corruption, it exits immediately, since attempting to continue could lead to more extensive data corruption and/or data loss. The behavior you report is expected in this situation.&lt;/p&gt;</comment>
                            <comment id="1409561" author="shuowang" created="Sun, 16 Oct 2016 01:48:14 +0000"  >&lt;p&gt;There was a mongodb instance crashed again at yesterday. But with the previous situation is different from the crashed instance can be restarted normally at this time. I&apos;ve archived the &lt;b&gt;diagnostic.data&lt;/b&gt; and &lt;b&gt;mongodb.log&lt;/b&gt;. Please see the attachment.&lt;/p&gt;

&lt;p&gt;Thanks.&lt;/p&gt;</comment>
                            <comment id="1408001" author="thomas.schubert" created="Thu, 13 Oct 2016 21:51:27 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=shuowang&quot; class=&quot;user-hover&quot; rel=&quot;shuowang&quot;&gt;shuowang&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Since there isn&apos;t anything more we can do to progress our investigation at this time, I am going to close this ticket. Please let us know if you encounter this issue again, and we will reopen this ticket and continue to investigate.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1406004" author="shuowang" created="Wed, 12 Oct 2016 05:38:55 +0000"  >&lt;p&gt;Thanks. It&apos;s a very helpful suggestion.&lt;/p&gt;</comment>
                            <comment id="1406001" author="thomas.schubert" created="Wed, 12 Oct 2016 05:21:46 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=shuowang&quot; class=&quot;user-hover&quot; rel=&quot;shuowang&quot;&gt;shuowang&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Unfortunately, from the information currently available, we cannot identify the root cause of this issue. Would you please upgrade to MongoDB 3.2.10 (the latest release) and make sure you&#8217;re configured to track error messages on failure and capture diagnostic information?&lt;/p&gt;

&lt;p&gt;Please also confirm your filesystem isn&#8217;t running out of space or doesn&#8217;t otherwise fail to meet the requirements of MongoDB. &lt;/p&gt;

&lt;p&gt;If this error happens again, we will need an archive of the &lt;tt&gt;diagnostic.data&lt;/tt&gt;, which would cover the period leading up to the failure, and confirmation no system errors occurred. In addition, I would recommend copying the the &lt;tt&gt;$dbpath&lt;/tt&gt; before resyncing if possible as an examination of the data files may help progress the investigation.&lt;/p&gt;

&lt;p&gt;Thank you,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1403693" author="shuowang" created="Sun, 9 Oct 2016 02:52:32 +0000"  >&lt;p&gt;&quot;A mongodb instance was unexpectedly closed&quot; means that the process suddenly crashed by itself. After that, I tried to start it, but it didn&apos;t work.&lt;br/&gt;
There wasn&apos;t any error informations in the system logs, such as /var/log/messages, and so on. I only found the mongodb log recorded some error informations.&lt;br/&gt;
The mongodb runs in VM, you can understand the VM is AWS EC2. And the storage device is similar to AWS EBS.&lt;/p&gt;</comment>
                            <comment id="1403578" author="keith.bostic" created="Sat, 8 Oct 2016 12:44:20 +0000"  >&lt;p&gt;Thank you for the report. We are investigating this issue, however, please be aware that determining the root cause of data corruption without a reproduction is challenging.&lt;/p&gt;

&lt;p&gt;Can you describe further what you mean by &quot;A mongodb instance was unexpectedly closed&quot;?&lt;/p&gt;

&lt;p&gt;Can you please tell us if there any errors recorded in the system logs, either before, or around the time of the failure?&lt;/p&gt;

&lt;p&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;/p&gt;</comment>
                            <comment id="1403556" author="shuowang" created="Sat, 8 Oct 2016 07:59:06 +0000"  >&lt;p&gt;There was another mongodb unexpectedly closed in a few days ago. The log information as follow:&lt;/p&gt;

&lt;p&gt;2016-10-04T02:44:34.634+0800 E STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;repl writer worker 16&amp;#93;&lt;/span&gt; WiredTiger (0) &lt;span class=&quot;error&quot;&gt;&amp;#91;1475520274:634770&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;8619:0x7f3d4b742700&amp;#93;&lt;/span&gt;, &lt;a href=&quot;file:collection-310--1292709067801170191.wt&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;file:collection-310--1292709067801170191.wt&lt;/a&gt;, WT_CURSOR.search: read checksum error for 12288B block at offset 139472896: calculated block checksum of 2825332407 doesn&apos;t match expected checksum of 2211965436&lt;br/&gt;
2016-10-04T02:44:34.634+0800 E STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;repl writer worker 16&amp;#93;&lt;/span&gt; WiredTiger (0) &lt;span class=&quot;error&quot;&gt;&amp;#91;1475520274:634823&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;8619:0x7f3d4b742700&amp;#93;&lt;/span&gt;, &lt;a href=&quot;file:collection-310--1292709067801170191.wt&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;file:collection-310--1292709067801170191.wt&lt;/a&gt;, WT_CURSOR.search: collection-310--1292709067801170191.wt: encountered an illegal file format or internal value&lt;br/&gt;
2016-10-04T02:44:34.634+0800 E STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;repl writer worker 16&amp;#93;&lt;/span&gt; WiredTiger (-31804) &lt;span class=&quot;error&quot;&gt;&amp;#91;1475520274:634836&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;8619:0x7f3d4b742700&amp;#93;&lt;/span&gt;, &lt;a href=&quot;file:collection-310--1292709067801170191.wt&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;file:collection-310--1292709067801170191.wt&lt;/a&gt;, WT_CURSOR.search: the process must exit and restart: WT_PANIC: WiredTiger library panic&lt;/p&gt;</comment>
                            <comment id="1403555" author="shuowang" created="Sat, 8 Oct 2016 07:41:02 +0000"  >&lt;p&gt;How can I modify the description? It&apos;s look like weird with unrecognized character.&lt;/p&gt;</comment>
                    </comments>
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