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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-16586] mongoperf crashes writing with MMF and syncDelay is other that 0-never</title>
                <link>https://jira.mongodb.org/browse/SERVER-16586</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;mongoperf crash in mode MMF when  syncDelay is set.&lt;br/&gt;
Inside mongoperf.cpp::syncThread(): mmfFile-&amp;gt;flush(true); call ProcessInfo::preferMsyncOverFSync(); who is not inited, and try use NULL pointer to class. &lt;br/&gt;
Function ProcessInfo::initializeSystemInfo(); should be used before first use of syncThread().&lt;/p&gt;</description>
                <environment></environment>
        <key id="175250">SERVER-16586</key>
            <summary>mongoperf crashes writing with MMF and syncDelay is other that 0-never</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="matt.kangas">Matt Kangas</assignee>
                                    <reporter username="spawlows">Slawomir Pawlowski</reporter>
                        <labels>
                    </labels>
                <created>Thu, 18 Dec 2014 11:58:23 +0000</created>
                <updated>Wed, 24 Dec 2014 17:21:33 +0000</updated>
                            <resolved>Fri, 19 Dec 2014 16:32:06 +0000</resolved>
                                    <version>2.8.0-rc2</version>
                                    <fixVersion>2.8.0-rc4</fixVersion>
                                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="790891" author="xgen-internal-githook" created="Fri, 19 Dec 2014 16:31:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;spawlows&apos;, u&apos;name&apos;: u&apos;Slawomir Pawlowski&apos;, u&apos;email&apos;: u&apos;spawlos@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16586&quot; title=&quot;mongoperf crashes writing with MMF and syncDelay is other that 0-never&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16586&quot;&gt;&lt;del&gt;SERVER-16586&lt;/del&gt;&lt;/a&gt; Fix mongoperf crash with MMF and syncDelay&lt;/p&gt;

&lt;p&gt;Closes #886&lt;/p&gt;

&lt;p&gt;Signed-off-by: Matt Kangas &amp;lt;matt.kangas@mongodb.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e7b514171c2bfbd6029e9cfc5daf3ac2a699e293&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e7b514171c2bfbd6029e9cfc5daf3ac2a699e293&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="789393" author="spawlows" created="Thu, 18 Dec 2014 13:00:25 +0000"  >&lt;p&gt;Yes I have done signed to contributor agreement. And I will be proud when my first pool request will be merged to official code &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="789389" author="ramon.fernandez" created="Thu, 18 Dec 2014 12:54:03 +0000"  >&lt;p&gt;Thanks for the pull request &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=spawlows&quot; class=&quot;user-hover&quot; rel=&quot;spawlows&quot;&gt;spawlows&lt;/a&gt;. As per the &lt;a href=&quot;http://www.mongodb.org/about/contributors/tutorial/submit-a-github-pull-request/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;instructions on how to submit a pull request&lt;/a&gt;, you&apos;ll need to sign the &lt;a href=&quot;http://www.mongodb.com/legal/contributor-agreement&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;contributor agreement&lt;/a&gt; before it can be considered for merging.&lt;/p&gt;

&lt;p&gt;If you have done that already then please disregard this message &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="789383" author="spawlows" created="Thu, 18 Dec 2014 12:42:33 +0000"  >&lt;p&gt;I found this problem in version v2.7.7-pre, but I checked this on master and today this bug still exist.&lt;br/&gt;
I use Linux Centos 7 64bit.&lt;br/&gt;
I prepared pool request with fix: &lt;a href=&quot;https://github.com/mongodb/mongo/pull/886&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/pull/886&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="789376" author="ramon.fernandez" created="Thu, 18 Dec 2014 12:18:50 +0000"  >&lt;p&gt;Nevermind &amp;#8211; I wasn&apos;t seeing any problems on 2.6.6, but I can reproduce the crash on master. Thanks for reporting this &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=spawlows&quot; class=&quot;user-hover&quot; rel=&quot;spawlows&quot;&gt;spawlows&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="789373" author="ramon.fernandez" created="Thu, 18 Dec 2014 12:15:22 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=spawlows&quot; class=&quot;user-hover&quot; rel=&quot;spawlows&quot;&gt;spawlows&lt;/a&gt;, what version of MongoDB are you using? And on which platform are you seeing the mongoperf crash?&lt;/p&gt;</comment>
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&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;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;echo &quot;{nThreads:16,fileSizeMB:1000,r:true,w:true,mmf:true,syncDelay:6}&quot; | ./mongoperf&lt;/span&gt;&lt;/pre&gt;
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