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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-10516] mongod crashes when re-mapping above user address space of 8TB on Windows</title>
                <link>https://jira.mongodb.org/browse/SERVER-10516</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When memory mapping on Windows mongod keeps track of the address to start the mapping at (adjusting by file size on every map). Since this is an always incrementing number mongod crashes with the above error when it hits the upper bound of user address space of 8TB (&lt;a href=&quot;http://blogs.technet.com/b/markrussinovich/archive/2008/11/17/3155406.aspx&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://blogs.technet.com/b/markrussinovich/archive/2008/11/17/3155406.aspx&lt;/a&gt;). Modifying the code to print the virtual address we are trying to map to, we get&lt;/p&gt;

&lt;p/&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;   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;Wed Aug 14 14:27:55.390 [conn1] MapViewOfFileEx for c:\data\db\test.0 failed with errno:487 Attempt to access invalid address. (file size is 2146435072) in MemoryMappedFile::map (for address 000007FED7000000)&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;</description>
                <environment>MongoDB x64 on Windows 7</environment>
        <key id="86007">SERVER-10516</key>
            <summary>mongod crashes when re-mapping above user address space of 8TB on Windows</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="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="sridhar">Sridhar Nanjundeswaran</reporter>
                        <labels>
                            <label>cap-ticket-needed</label>
                    </labels>
                <created>Wed, 14 Aug 2013 22:00:18 +0000</created>
                <updated>Mon, 11 Jul 2016 17:40:52 +0000</updated>
                            <resolved>Thu, 8 May 2014 14:19:13 +0000</resolved>
                                                    <fixVersion>2.7.1</fixVersion>
                                    <component>Stability</component>
                                        <votes>2</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="576819" author="xgen-internal-githook" created="Thu, 8 May 2014 13:55:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;markbenvenuto&apos;, u&apos;name&apos;: u&apos;Mark Benvenuto&apos;, u&apos;email&apos;: u&apos;mark.benvenuto@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10516&quot; title=&quot;mongod crashes when re-mapping above user address space of 8TB on Windows&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10516&quot;&gt;&lt;del&gt;SERVER-10516&lt;/del&gt;&lt;/a&gt;: Mitigate invalid address errors for MapViewOfFileEx&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0205239ecb579e20b05cee3a0df394eb11ba14ce&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0205239ecb579e20b05cee3a0df394eb11ba14ce&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="566538" author="meeron" created="Tue, 29 Apr 2014 07:36:57 +0000"  >&lt;p&gt;@dwight our mongo db process is running on Windows Server 2012 Datacenter, so it gives us 8TB virtual memory. When process is restarted it is working till first query is being executed.&lt;/p&gt;</comment>
                            <comment id="565975" author="dwight_10gen" created="Mon, 28 Apr 2014 20:00:22 +0000"  >&lt;p&gt;this page suggests one might be able to go up to 128TB virtual with Windows Server 2012 R2:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;but divide that # in two, the way the storage engine works with journaling, and then also factor in the issue mentioned above in this ticket.  But you might get farther with 2012R2 than anything else.&lt;/p&gt;</comment>
                            <comment id="565957" author="dwight_10gen" created="Mon, 28 Apr 2014 19:52:00 +0000"  >&lt;p&gt;@miron does it work for a while and then start crashing?  if so restarting the mongod process periodically might help.  linux would presumably resolve it.  there is a bug here to be fixed but it looks like based on the link that some versions of windows server the actual virtual limit is somewhat small.  what version of windows are you using?  &lt;/p&gt;</comment>
                            <comment id="527235" author="meeron" created="Sat, 29 Mar 2014 09:20:18 +0000"  >&lt;p&gt;hi, is there is any workaround to this isssue? or just move mongo do linux? we have 2,3TB database and on windows mongo is crashing when invoking any  query&lt;/p&gt;</comment>
                            <comment id="405035" author="dwight_10gen" created="Fri, 16 Aug 2013 22:01:44 +0000"  >&lt;p&gt;i&apos;ll take a look.&lt;/p&gt;</comment>
                    </comments>
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                            <customfieldvalue>&lt;p&gt;on a new mongod instance, create a capped collection of 2GB.&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;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;&amp;gt; use test&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;
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&lt;p/&gt;
&lt;p&gt;Now in a loop unmap and remap the database &lt;/p&gt;
&lt;p/&gt;
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					&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;&amp;gt; for (i=0;i&amp;lt;1000;i++) {&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;... db.adminCommand(&quot;closeAllDatabases&quot;);&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
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