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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-19949] Fatal Assertion 28561 on startup due to corrupt WiredTiger.basecfg file</title>
                <link>https://jira.mongodb.org/browse/SERVER-19949</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello,&lt;br/&gt;
MongoDB crashes after Fatal Assertion 28561&lt;br/&gt;
I try run mongod through command:&lt;br/&gt;
$ mongod --storageEngine wiredTiger --dbpath ~/tmp/db/meteor_3.0 --port 3001&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;2015-08-14T12:36:06.021+0300 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=8G,session_max=20000,eviction=(threads_max=4),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;2015-08-14T12:36:06.022+0300 E STORAGE  [initandlisten] WiredTiger (22) [1439544966:22251][1160:0x7fff732a7300], wiredtiger_open: Error parsing &apos;(major=2\nminor=5)&apos; at byte 15: Value already complete: 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;2015-08-14T12:36:06.022+0300 E STORAGE  [initandlisten] WiredTiger (22) [1439544966:22285][1160:0x7fff732a7300], wiredtiger_open: Error parsing &apos;(major=2\nminor=5)&apos; at byte 15: Value already complete: 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;2015-08-14T12:36:06.022+0300 I -        [initandlisten] Fatal Assertion 28561&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;2015-08-14T12:36:06.022+0300 I -        [initandlisten]&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;How can I fix this and how do I keep as much of my data as possible?&lt;/p&gt;

</description>
                <environment></environment>
        <key id="225671">SERVER-19949</key>
            <summary>Fatal Assertion 28561 on startup due to corrupt WiredTiger.basecfg file</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="Laboratory">Vitaly [X]</reporter>
                        <labels>
                    </labels>
                <created>Fri, 14 Aug 2015 09:36:58 +0000</created>
                <updated>Fri, 14 Aug 2015 13:19:10 +0000</updated>
                            <resolved>Fri, 14 Aug 2015 13:19:10 +0000</resolved>
                                    <version>3.0.5</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1005505" author="laboratory" created="Fri, 14 Aug 2015 10:36:25 +0000"  >&lt;p&gt;Thx, it works.&lt;br/&gt;
It happened in realtime, simply stopped creating new mongo connections.&lt;/p&gt;

&lt;p&gt;Vitaly&lt;/p&gt;</comment>
                            <comment id="1005498" author="michael.cahill" created="Fri, 14 Aug 2015 10:29:52 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=Laboratory&quot; class=&quot;user-hover&quot; rel=&quot;Laboratory&quot;&gt;Laboratory&lt;/a&gt;, since the version config mentioned in the error message does not appear in the &lt;tt&gt;wiredtiger_open&lt;/tt&gt; config in &lt;tt&gt;mongod.log&lt;/tt&gt;, this looks like the &lt;tt&gt;WiredTiger.basecfg&lt;/tt&gt; file has become corrupted.  Do you know if that file has been edited since the database was created?&lt;/p&gt;

&lt;p&gt;It is probably safe to rename &lt;tt&gt;WiredTiger.basecfg&lt;/tt&gt; to &lt;tt&gt;WiredTiger.basecfg.old&lt;/tt&gt; or similar: &lt;tt&gt;mongod&lt;/tt&gt; should start correctly without it.&lt;/p&gt;</comment>
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