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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-17472] &quot;mongod&quot; process missing, killed by OOM killer</title>
                <link>https://jira.mongodb.org/browse/SERVER-17472</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Environment: &lt;br/&gt;
      3 sharding, (host:192.168.1.201~192.168.1.203, port:27017)&lt;br/&gt;
      1 config server, (host:192.168.1.201, port:27019)&lt;br/&gt;
      1 mongos. (host:192.168.1.201, port:27027)&lt;/p&gt;

&lt;p&gt;OS:&lt;br/&gt;
      CentOS 6.5&lt;/p&gt;

&lt;p&gt;Driver:&lt;br/&gt;
      mongo-java-driver 2.13.0&lt;br/&gt;
      spring-data-mongodb 1.6.2.RELEASE&lt;/p&gt;

&lt;p&gt;&quot;mongod&quot; process in host 192.168.1.203 is missing at multithread insert.&lt;br/&gt;
about detail, please check log file.(Occurred at &quot;2015-03-05T07:52&quot; )&lt;/p&gt;</description>
                <environment></environment>
        <key id="187571">SERVER-17472</key>
            <summary>&quot;mongod&quot; process missing, killed by OOM killer</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="ramon.fernandez@mongodb.com">Ramon Fernandez Marina</assignee>
                                    <reporter username="liubei">liubei</reporter>
                        <labels>
                    </labels>
                <created>Thu, 5 Mar 2015 03:09:13 +0000</created>
                <updated>Fri, 6 Mar 2015 14:57:39 +0000</updated>
                            <resolved>Fri, 6 Mar 2015 14:57:39 +0000</resolved>
                                    <version>3.0.0-rc11</version>
                                                    <component>Admin</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="844803" author="ramon.fernandez" created="Fri, 6 Mar 2015 14:56:25 +0000"  >&lt;p&gt;Thanks for letting us know &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=liubei&quot; class=&quot;user-hover&quot; rel=&quot;liubei&quot;&gt;liubei&lt;/a&gt;. In general one can&apos;t go wrong adding more memory, but I think it&apos;s good practice to always have enough swap space around to allow the system to degrade gracefully under load. One common approach is to have a swap space that&apos;s twice the size of the physical memory.&lt;/p&gt;

&lt;p&gt;If you have further questions about memory configuration for MongoDB please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;, where your question will reach a larger audience. A question like this involving more discussion would be best posted on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n&lt;/p&gt;</comment>
                            <comment id="844520" author="liubei" created="Fri, 6 Mar 2015 02:50:45 +0000"  >&lt;p&gt;Ramon Fernandez, Thank you very much!  indeed the OOM killer terminated &#8220;mongod&#8221;.&lt;/p&gt;

&lt;p&gt;Then, this mean that I need to increase the physical memory? Can you give me some suggestions? Thanks again!&lt;/p&gt;</comment>
                            <comment id="843700" author="ramon.fernandez" created="Thu, 5 Mar 2015 13:56:06 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=liubei&quot; class=&quot;user-hover&quot; rel=&quot;liubei&quot;&gt;liubei&lt;/a&gt;, what I see in the logs is that &lt;tt&gt;mongod&lt;/tt&gt; in 192.168.1.203 is unavailable to &lt;tt&gt;mongos&lt;/tt&gt; for a period of time, but the logs for that &lt;tt&gt;mongod&lt;/tt&gt; show entries until &lt;tt&gt;2015-03-05T08:52:11.775+0800&lt;/tt&gt;. Is it the case that &lt;tt&gt;mongod&lt;/tt&gt; was no longer running after that log entry? Or that &lt;tt&gt;mongos&lt;/tt&gt; had trouble communicating with it for a period of time?&lt;/p&gt;

&lt;p&gt;If the &lt;tt&gt;mongod&lt;/tt&gt; process stopped running in 192.168.1.203, and you please check your system logs on that host? Look for messages saying &quot;killed process&quot; to see if the OOM killer terminated &lt;tt&gt;mongod&lt;/tt&gt;.&lt;/p&gt;</comment>
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                            <attachment id="66541" name="log.zip" size="16049760" author="liubei" created="Thu, 5 Mar 2015 03:09:13 +0000"/>
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