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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-31602] WiredTiger.wt: read checksum error. block header checksum doesn&apos;t match expected checksum</title>
                <link>https://jira.mongodb.org/browse/SERVER-31602</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello there, can someone help me? I&apos;ve mounted my data volume into a docker container running a mongod and accidentally stopped the execution with CTRL-C. After that I could not restart my local mongod using the same data directory. I saw in some issues e.g here &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31196&quot; title=&quot;WiredTiger.wt: encountered an illegal file format or internal value&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31196&quot;&gt;&lt;del&gt;SERVER-31196&lt;/del&gt;&lt;/a&gt;(&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31196&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-31196&lt;/a&gt;)) that the problem may be resolved by replacing some WiredTiger files. So I did. But unfortunately that didn&apos;t work out. &lt;/p&gt;

&lt;p&gt;Could you tell me:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;is a recovery possible somehow? Even now that I have replaced my original WiredTiger.wt and WiredTiger.turtle files?&lt;/li&gt;
	&lt;li&gt;what information do you need from me then?&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Here is the stacktrace of my initial try using the `--repair` statement.&lt;/p&gt;

&lt;p&gt;Thank you in advance. Matthaeus&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;
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						&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;mongod --dbpath /usr/local/var/mongodb/ --repair&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;2017-10-17T17:07:03.656+0200 I CONTROL  [initandlisten] MongoDB starting : pid=43731 port=27017 dbpath=/usr/local/var/mongodb/ 64-bit host=...&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;2017-10-17T17:07:03.657+0200 I CONTROL  [initandlisten] db version v3.4.9&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;2017-10-17T17:07:03.657+0200 I CONTROL  [initandlisten] git version: 876ebee8c7dd0e2d992f36a848ff4dc50ee6603e&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;2017-10-17T17:07:03.657+0200 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.2l  25 May 2017&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;2017-10-17T17:07:03.657+0200 I CONTROL  [initandlisten] allocator: system&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;2017-10-17T17:07:03.657+0200 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;2017-10-17T17:07:03.657+0200 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;2017-10-17T17:07:03.657+0200 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;2017-10-17T17:07:03.657+0200 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;2017-10-17T17:07:03.657+0200 I CONTROL  [initandlisten] options: { repair: true, storage: { dbPath: &quot;/usr/local/var/mongodb/&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;2017-10-17T17:07:03.657+0200 W -        [initandlisten] Detected unclean shutdown - /usr/local/var/mongodb/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;2017-10-17T17:07:03.658+0200 I -        [initandlisten] Detected data files in /usr/local/var/mongodb/ 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;2017-10-17T17:07:03.658+0200 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;2017-10-17T17:07:03.658+0200 I STORAGE  [initandlisten] Detected WT journal files.  Running recovery from last 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;2017-10-17T17:07:03.658+0200 I STORAGE  [initandlisten] journal to nojournal transition config: create,cache_size=3584M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),&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;2017-10-17T17:07:04.588+0200 E STORAGE  [initandlisten] WiredTiger error (0) [1508252824:588393][43731:0x7fffc76a43c0], file:WiredTiger.wt, WT_CURSOR.search_near: read checksum error for 24576B block at offset 57344: block header checksum of 1668246562 doesn&apos;t match expected checksum of 3206759375&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;2017-10-17T17:07:04.588+0200 E STORAGE  [initandlisten] WiredTiger error (0) [1508252824:588464][43731:0x7fffc76a43c0], file:WiredTiger.wt, WT_CURSOR.search_near: WiredTiger.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;   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;2017-10-17T17:07:04.588+0200 E STORAGE  [initandlisten] WiredTiger error (-31804) [1508252824:588480][43731:0x7fffc76a43c0], file:WiredTiger.wt, WT_CURSOR.search_near: the process must exit and restart: WT_PANIC: 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;2017-10-17T17:07:04.588+0200 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;2017-10-17T17:07:04.588+0200 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;   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;&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;   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;2017-10-17T17:07:04.599+0200 F -        [initandlisten] Got signal: 6 (Abort trap: 6).&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
</description>
                <environment>MacOS 10.12.6&lt;br/&gt;
mongod 3.4.9</environment>
        <key id="446686">SERVER-31602</key>
            <summary>WiredTiger.wt: read checksum error. 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="mark.agarunov">Mark Agarunov</assignee>
                                    <reporter username="matthaeus">Matth&#228;us Zloch</reporter>
                        <labels>
                            <label>docker</label>
                            <label>envc</label>
                            <label>rge</label>
                            <label>rps</label>
                            <label>trcf</label>
                            <label>wtc</label>
                    </labels>
                <created>Tue, 17 Oct 2017 15:57:01 +0000</created>
                <updated>Tue, 14 Aug 2018 17:13:02 +0000</updated>
                            <resolved>Fri, 20 Oct 2017 21:58:03 +0000</resolved>
                                    <version>3.4.9</version>
                                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1890872" author="thomas.schubert" created="Mon, 14 May 2018 18:56:02 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rjv94rnjn&quot; class=&quot;user-hover&quot; rel=&quot;rjv94rnjn&quot;&gt;rjv94rnjn&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;As I mentioned on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26855&quot; title=&quot;block header checksum of 2754197295 doesn&amp;#39;t match expected checksum of 275815989&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26855&quot;&gt;&lt;del&gt;SERVER-26855&lt;/del&gt;&lt;/a&gt;, so we can track this issue, would you please open a new SERVER ticket including the logs from the failed start up attempt?&lt;/p&gt;

&lt;p&gt;Thank you,&lt;br/&gt;
Kelsey&lt;/p&gt;</comment>
                            <comment id="1890036" author="rjv94rnjn" created="Sun, 13 May 2018 17:59:08 +0000"  >&lt;p&gt;Hi,&lt;br/&gt;
I am getting same issue...Pl help if possible &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/186675/186675_WiredTiger.turtle&quot; title=&quot;WiredTiger.turtle attached to SERVER-31602&quot;&gt;WiredTiger.turtle&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/186676/186676_WiredTiger.wt&quot; title=&quot;WiredTiger.wt attached to SERVER-31602&quot;&gt;WiredTiger.wt&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="1705343" author="mark.agarunov" created="Fri, 20 Oct 2017 21:57:48 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthaeus&quot; class=&quot;user-hover&quot; rel=&quot;matthaeus&quot;&gt;matthaeus&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, we recommend &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;implementing regular backups&lt;/a&gt; and/or &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;replication&lt;/a&gt; to mitigate any issues related to unreliable storage layers or server failures.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                            <comment id="1705334" author="matthaeus" created="Fri, 20 Oct 2017 21:48:51 +0000"  >&lt;p&gt;I didn&apos;t try that. Ahhh.. it seems like the mongod service could now start up again. I can access the database again! thank you! I did:&lt;/p&gt;

&lt;p&gt;`mongod --dbpath /usr/local/var/mongodb`&lt;/p&gt;

&lt;p&gt;Thank you for the quick response and the fixes!&lt;/p&gt;</comment>
                            <comment id="1704335" author="mark.agarunov" created="Thu, 19 Oct 2017 22:01:15 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthaeus&quot; class=&quot;user-hover&quot; rel=&quot;matthaeus&quot;&gt;matthaeus&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for providing this information. After running with &lt;tt&gt;-&lt;del&gt;repair&lt;/tt&gt;, is the error the same when mongod is started without &lt;tt&gt;&lt;/del&gt;-repair&lt;/tt&gt;? &lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                            <comment id="1702957" author="matthaeus" created="Wed, 18 Oct 2017 18:14:41 +0000"  >&lt;p&gt;Hi Mark, thank you for the fixes. &lt;/p&gt;

&lt;p&gt;I have extracted the files and&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;`cp -p Downloads/WiredTiger.* /usr/local/var/mongodb/.`&lt;/li&gt;
	&lt;li&gt;`chown matthaeus:admin /usr/local/var/mongodb/WiredTiger.wt /usr/local/var/mongodb/WiredTiger.turtle`&lt;/li&gt;
	&lt;li&gt;`mongod --dbpath /usr/local/var/mongodb --repair`&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;There was much output on the console, seems like mongod could resolve some issues. But there was another error which keeps mongod still from starting normally. I have added the console output as repair-&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31602&quot; title=&quot;WiredTiger.wt: read checksum error. block header checksum doesn&amp;#39;t match expected checksum&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31602&quot;&gt;&lt;del&gt;SERVER-31602&lt;/del&gt;&lt;/a&gt;.log.&lt;/p&gt;

&lt;p&gt;Is there something you can do? Regards, Matth&#228;us&lt;/p&gt;

&lt;p&gt;Answers to your questions:&lt;/p&gt;

&lt;p&gt;1. local HDD&lt;br/&gt;
2. fine&lt;br/&gt;
3. no. 3.4.2 before the error. I&apos;ve updated to 3.4.9 because I thought the --repair tool got better.&lt;br/&gt;
4. mongod was running in a container (with docker-compose up) when I stopped the process with CTRL-C.&lt;br/&gt;
5. no&lt;br/&gt;
6. none, since currently in dev-mode&lt;br/&gt;
7. clean&lt;/p&gt;</comment>
                            <comment id="1701968" author="mark.agarunov" created="Tue, 17 Oct 2017 21:24:02 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthaeus&quot; class=&quot;user-hover&quot; rel=&quot;matthaeus&quot;&gt;matthaeus&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for providing these files. 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>
                            <comment id="1701905" author="matthaeus" created="Tue, 17 Oct 2017 20:34:15 +0000"  >&lt;p&gt;Hi Mark, thank you for the quick answer. I fortunately have made a backup before experimenting with the commands. I will add the two files of my original dataset to the issue. That would be great if your attempt of repair would work. Regards, Matth&#228;us &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/186675/186675_WiredTiger.turtle&quot; title=&quot;WiredTiger.turtle attached to SERVER-31602&quot;&gt;WiredTiger.turtle&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/186676/186676_WiredTiger.wt&quot; title=&quot;WiredTiger.wt attached to SERVER-31602&quot;&gt;WiredTiger.wt&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="1701587" author="mark.agarunov" created="Tue, 17 Oct 2017 17:56:36 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthaeus&quot; class=&quot;user-hover&quot; rel=&quot;matthaeus&quot;&gt;matthaeus&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for the report. When replacing the WiredTiger.turtle and WiredTiger.wt files, which files did you use to replace them? These files are generally specific to the dataset, and cannot be used with a different dataset. If you provide these files, I can attempt a repair of the files, but it is unlikely to succeed if they are not from the same dataset being used.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark &lt;/p&gt;</comment>
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