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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-25118] MongoDB gets corrupted after docker container restart (WT_NOTFOUND)</title>
                <link>https://jira.mongodb.org/browse/SERVER-25118</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Sometimes, with no particular explicit reason, MongoDB gives me this 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;[initandlisten] Detected data files in /data/db 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;[initandlisten] wiredtiger_open config: create,cache_size=1G,session_max=20000,eviction=(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;
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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;   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;[initandlisten] Assertion: 28595:-31803: WT_NOTFOUND: item not found&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;[initandlisten] exception in initAndListen: 28595 -31803: WT_NOTFOUND: item not found, terminating&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;[initandlisten] dbexit:  rc: 100&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;After restarting the associated Docker container with `Ctrl+C` or with `docker stop`.&lt;/p&gt;

&lt;p&gt;The container has a volume to persist `/data/db` directory on the host.&lt;/p&gt;

&lt;p&gt;Once again, &lt;b&gt;most of the times&lt;/b&gt; (that is 99%), stopping and restarting the container works perfectly and MongoDB has no problem with that. But &lt;b&gt;sometimes&lt;/b&gt;, I&apos;m not able to restart the container because of the error shown above.&lt;/p&gt;

&lt;p&gt;When this happens, the only solution that has &quot;worked&quot; so far has been to empty the `data/db` directory on the host, and here we start with an empty (but working) db.&lt;/p&gt;

&lt;p&gt;I have to say that informations about `WT_NOTFOUND` error on the internet is quite sparse, so no amount of digging MongoDB issues has solved this problem so far.&lt;/p&gt;</description>
                <environment></environment>
        <key id="301652">SERVER-25118</key>
            <summary>MongoDB gets corrupted after docker container restart (WT_NOTFOUND)</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="-1">Unassigned</assignee>
                                    <reporter username="jivan">Jivan Roquet</reporter>
                        <labels>
                    </labels>
                <created>Sat, 16 Jul 2016 18:16:22 +0000</created>
                <updated>Wed, 5 Jul 2017 15:40:14 +0000</updated>
                            <resolved>Wed, 20 Jul 2016 12:55:08 +0000</resolved>
                                    <version>3.3.9</version>
                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>15</watches>
                                                                                                                <comments>
                            <comment id="1329671" author="ramon.fernandez" created="Wed, 20 Jul 2016 12:55:00 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jivan&quot; class=&quot;user-hover&quot; rel=&quot;jivan&quot;&gt;jivan&lt;/a&gt;, the error you&apos;re seeing indicates that there&apos;s vital files missing from &lt;tt&gt;/data/db&lt;/tt&gt;, which is typical of platforms that don&apos;t support &lt;tt&gt;fsync()&lt;/tt&gt; calls correctly.&lt;/p&gt;

&lt;p&gt;I&apos;m not familiar with Docker internals, so I don&apos;t know what happens when the container is stopped or interrupted with ^C, but unless &lt;tt&gt;mongodb&lt;/tt&gt; is safely shut down and all the &lt;tt&gt;fsync()&lt;/tt&gt; calls honored then this behavior is not unexpected.&lt;/p&gt;

&lt;p&gt;Please note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server, and since the behavior you describe is not unexpected I&apos;m going to close this ticket. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;, where your question will reach a larger audience. A question like this involving more discussion would be best posted on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt;. See also our &lt;a href=&quot;https://www.mongodb.org/about/support/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Technical Support page&lt;/a&gt; for additional support resources.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                            <comment id="1326245" author="jivan" created="Sat, 16 Jul 2016 22:30:27 +0000"  >&lt;p&gt;Some more informations after having dug into the GitHub repository of WiredTiger.&lt;/p&gt;

&lt;p&gt;Looks like `WT_NOTFOUND` can be triggered either by:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;a given key was not found in the Bloom filter (see &lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/blob/master/src/bloom/bloom.c#L288&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/blob/master/src/bloom/bloom.c#L288&lt;/a&gt;)&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;an expected environment variable could not be found or was empty (see &lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/blob/master/src/os_posix/os_getenv.c#L25&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/blob/master/src/os_posix/os_getenv.c#L25&lt;/a&gt;)&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I have to say that, since this error surfaces as the MongoDB termination output, this is quite confusing regarding to what triggered the error. Was a key not found in the Bloom filter, or was an environment variable missing?&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="399876">SERVER-29952</issuekey>
        </issuelink>
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                <attachments>
                            <attachment id="130990" name="Screen Shot 2016-07-16 at 21.13.30.png" size="313903" author="jivan" created="Sat, 16 Jul 2016 18:16:22 +0000"/>
                            <attachment id="130991" name="mongodb_wt_notfound.txt" size="2424" author="jivan" created="Sat, 16 Jul 2016 18:16:22 +0000"/>
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