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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-12395] Add unique value to MongoFile for uniqueness check for msync()</title>
                <link>https://jira.mongodb.org/browse/SERVER-12395</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We msync() without the MongoFiles lock, so it&apos;s possible for things to be closed out from under us.  When msync() fails, we go to check to see if our MongoFile is still valid and if not, we ignore the msync error.&lt;br/&gt;
The way we check if the file is still valid is by checking to see if the pointer value still exists in the std::set of MongoFiles.   This check is flawed because it&apos;s possible to have a MongoFile be destroyed and then have a new one created with the same address.&lt;br/&gt;
To ensure MongoFile uniqueness, we can embed a unique value (by using an AtomicInt counter) that we can use to compare.&lt;/p&gt;</description>
                <environment></environment>
        <key id="106578">SERVER-12395</key>
            <summary>Add unique value to MongoFile for uniqueness check for msync()</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Jan 2014 18:01:41 +0000</created>
                <updated>Mon, 11 Jul 2016 17:19:27 +0000</updated>
                            <resolved>Fri, 17 Jan 2014 22:29:36 +0000</resolved>
                                                    <fixVersion>2.5.5</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="483959" author="xgen-internal-githook" created="Fri, 17 Jan 2014 22:29:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12395&quot; title=&quot;Add unique value to MongoFile for uniqueness check for msync()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12395&quot;&gt;&lt;del&gt;SERVER-12395&lt;/del&gt;&lt;/a&gt; add unique id and check when msync fails&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7af069e5ac40a7b7a5324124e66a82d16d30e9b5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7af069e5ac40a7b7a5324124e66a82d16d30e9b5&lt;/a&gt;&lt;/p&gt;</comment>
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