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    <title>MongoDB Jira</title>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-5287] Errors in MapViewOfFile() might return incomplete data in a query</title>
                <link>https://jira.mongodb.org/browse/SERVER-5287</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Right now, if MapViewOfFile() returns an error, we just log a message and blindly continue.  This can result in incomplete data being returned for a given query, as illustrated by the failing update.js test on Windows.&lt;/p&gt;

&lt;p&gt;We should throw an exception (or massert) when the Windows function returns an error, to prevent the query from proceeding.&lt;br/&gt;
I see that calls to mmap() also just return 0 and do not throw an exception, so perhaps we should throw here as well?&lt;br/&gt;
The alternative is to check all the places where we&apos;re using MemoryMappedFile member functions and ensure we&apos;re not ignoring their return statuses.&lt;/p&gt;</description>
                <environment>Windows</environment>
        <key id="32771">SERVER-5287</key>
            <summary>Errors in MapViewOfFile() might return incomplete data in a query</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="tad">Tad Marshall</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 12 Mar 2012 16:00:59 +0000</created>
                <updated>Mon, 11 Jul 2016 18:34:00 +0000</updated>
                            <resolved>Fri, 13 Apr 2012 16:36:38 +0000</resolved>
                                    <version>2.1.0</version>
                                    <fixVersion>2.1.1</fixVersion>
                                    <component>Logging</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="109654" author="auto" created="Fri, 13 Apr 2012 16:34:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;tadmarshall&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5287&quot; title=&quot;Errors in MapViewOfFile() might return incomplete data in a query&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5287&quot;&gt;&lt;del&gt;SERVER-5287&lt;/del&gt;&lt;/a&gt; Abort if Windows MapViewOfFile fails&lt;/p&gt;

&lt;p&gt;If we try to memory map a file in Windows and fail, consider&lt;br/&gt;
this a fatal error.  Improve logging so we can see details of&lt;br/&gt;
what failed.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/67abadc4f54cc31735504081fee230a64e19d24f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/67abadc4f54cc31735504081fee230a64e19d24f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="109084" author="tad" created="Thu, 12 Apr 2012 13:21:31 +0000"  >&lt;p&gt;We now fassert on a failed remap, it makes no sense not to fassert on the initial map failure.&lt;/p&gt;</comment>
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