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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-10731] Potential memory leak causing crash of mongod</title>
                <link>https://jira.mongodb.org/browse/SERVER-10731</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The mongod instance crashed, logs only show potential memleak warnings.  Logs have been attached.&lt;/p&gt;</description>
                <environment>Centos 6.3</environment>
        <key id="89244">SERVER-10731</key>
            <summary>Potential memory leak causing crash of mongod</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="james.wahlin@mongodb.com">James Wahlin</assignee>
                                    <reporter username="jberger@sailthru.com">Jeffrey Berger</reporter>
                        <labels>
                    </labels>
                <created>Tue, 10 Sep 2013 18:42:31 +0000</created>
                <updated>Mon, 11 Jul 2016 17:40:24 +0000</updated>
                            <resolved>Fri, 13 Sep 2013 12:34:25 +0000</resolved>
                                    <version>2.0.6</version>
                                                    <component>Stability</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="424325" author="james.wahlin@10gen.com" created="Fri, 13 Sep 2013 12:34:25 +0000"  >&lt;p&gt;Thanks Jeff. Nothing else that comes to mind. Feel free to reopen this ticket if any further questions come up.&lt;/p&gt;</comment>
                            <comment id="423917" author="jberger@sailthru.com" created="Thu, 12 Sep 2013 21:49:28 +0000"  >&lt;p&gt;James&lt;/p&gt;

&lt;p&gt;Thanks for your comments, my organization has decided that we&apos;ll upgrade to 2.4.4 as planned as neither of those issues affects us.  You can mark the ticket as closed unless there is anything else you can think of.&lt;/p&gt;

&lt;p&gt;-Jeff&lt;/p&gt;</comment>
                            <comment id="422860" author="james.wahlin@10gen.com" created="Wed, 11 Sep 2013 19:09:50 +0000"  >&lt;p&gt;Hi Jeff,&lt;/p&gt;

&lt;p&gt;mongod instances do have a 20K connection limit, regardless of ulimit settings so &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10732&quot; title=&quot;Large number of connections cause socket exceptions and mongod crash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10732&quot;&gt;&lt;del&gt;SERVER-10732&lt;/del&gt;&lt;/a&gt; appears to be a separate issue. As for the upgrade, if your are using authentication I would definitely upgrade to at least 2.4.5 due to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10040&quot; title=&quot;Failed SSL connection memory leak&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10040&quot;&gt;&lt;del&gt;SERVER-10040&lt;/del&gt;&lt;/a&gt;. If you are sharded and have very large documents (16MB+) then I would upgrade to 2.4.6 due to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10478&quot; title=&quot;Very large documents can cause premature migration commit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10478&quot;&gt;&lt;del&gt;SERVER-10478&lt;/del&gt;&lt;/a&gt;. Our general recommendation would be to upgrade to the latest stable version as it will have bug fixes that earlier versions do not.&lt;/p&gt;

&lt;p&gt;thanks,&lt;br/&gt;
James&lt;/p&gt;</comment>
                            <comment id="422845" author="jberger@sailthru.com" created="Wed, 11 Sep 2013 18:59:09 +0000"  >&lt;p&gt;Hi James&lt;/p&gt;

&lt;p&gt;We experienced another issue and there is a JIRA ticket for that ( &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10732&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-10732&lt;/a&gt; ).  We are planning on upgrading to 2.4.4 next week.  Is there a reason to upgrade to 2.4.6 instead?&lt;/p&gt;

&lt;p&gt;Thanks&lt;br/&gt;
Jeff&lt;/p&gt;</comment>
                            <comment id="422830" author="james.wahlin@10gen.com" created="Wed, 11 Sep 2013 18:38:58 +0000"  >&lt;p&gt;Hi Jeffrey,&lt;/p&gt;

&lt;p&gt;The &quot;could indicate a memory leak&quot; are overly verbose and are logged when difference between the virtual address space and the mapped size is above an arbitrarily threshold. I would not be concerned by them as there is no substantial growth as they occur throughout your log. Unfortunately there is nothing else in the log that points to the reason for the server restart. Have you experienced other crashes recently?&lt;/p&gt;

&lt;p&gt;I would recommend is an upgrade from MongoDB 2.0.6 to either 2.2.6 or 2.4.6. The version you are running is dated and there have been numerous improvements to MongoDB since then. If you are not in a position to go to 2.2 or 2.4, I would upgrade to 2.0.9 (the latest stable 2.0 release) at a minimum.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
James&lt;/p&gt;
</comment>
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                            <attachment id="30972" name="mongodb.log" size="158681" author="jberger@sailthru.com" created="Tue, 10 Sep 2013 18:42:31 +0000"/>
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