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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-52926] [3.6] Mongo db crash with Got signal: 11 - KVDatabaseCatalogEntryBase::AddCollectionChange::rollback</title>
                <link>https://jira.mongodb.org/browse/SERVER-52926</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;MongoDB shell version v3.6.10&lt;br/&gt;
git version: 3e3ab85bfb98875af3bc6e74eeb945b0719f69c8&lt;br/&gt;
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013&lt;br/&gt;
allocator: tcmalloc&lt;br/&gt;
modules: none&lt;br/&gt;
build environment:&lt;br/&gt;
 distmod: rhel70&lt;br/&gt;
 distarch: x86_64&lt;br/&gt;
 target_arch: x86_64&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/287667/287667_mongodb.log&quot; title=&quot;mongodb.log attached to SERVER-52926&quot;&gt;mongodb.log&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1544727">SERVER-52926</key>
            <summary>[3.6] Mongo db crash with Got signal: 11 - KVDatabaseCatalogEntryBase::AddCollectionChange::rollback</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="3">Duplicate</resolution>
                                        <assignee username="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="xuchao528610@gmail.com">Chao Xu</reporter>
                        <labels>
                    </labels>
                <created>Wed, 18 Nov 2020 03:28:28 +0000</created>
                <updated>Sat, 16 Oct 2021 00:50:25 +0000</updated>
                            <resolved>Fri, 4 Dec 2020 19:56:42 +0000</resolved>
                                    <version>3.6.10</version>
                                                    <component>Catalog</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3763040" author="apocarteres" created="Mon, 10 May 2021 08:45:56 +0000"  >&lt;p&gt;btw also affects 3.6.18&lt;/p&gt;</comment>
                            <comment id="3516925" author="benety.goh" created="Fri, 4 Dec 2020 19:56:42 +0000"  >&lt;p&gt;Symptoms match those reported in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38419&quot; title=&quot;Crash in rename collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38419&quot;&gt;&lt;del&gt;SERVER-38419&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49384&quot; title=&quot;the replset primary crashed without a clear reason&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49384&quot;&gt;&lt;del&gt;SERVER-49384&lt;/del&gt;&lt;/a&gt;, and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37443&quot; title=&quot;Reuse in-memory catalog objects through collection rename&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37443&quot;&gt;&lt;del&gt;SERVER-37443&lt;/del&gt;&lt;/a&gt;. The root cause was a defect in the in-memory catalog that was fixed in 4.2 - see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37443&quot; title=&quot;Reuse in-memory catalog objects through collection rename&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37443&quot;&gt;&lt;del&gt;SERVER-37443&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="3499045" author="JIRAUSER1257673" created="Fri, 20 Nov 2020 02:24:20 +0000"  >&lt;p&gt;Hi Dima,&lt;/p&gt;

&lt;p&gt;I&apos;m so sorry about this case, My colleague&#8217;s handling at that time only kept the situation at that time not try to restart that node. but I mistakenly thought they restarted and this error log was the result after restart. so you already explained this crash root cause. I restarted the node in this morning. I think it&apos;s not a bug. we could close this case.&lt;/p&gt;

&lt;p&gt;Thanks again.&lt;/p&gt;

&lt;p&gt;have a good life.&lt;/p&gt;

&lt;p&gt;Chao&lt;/p&gt;</comment>
                            <comment id="3497560" author="JIRAUSER1257673" created="Thu, 19 Nov 2020 14:22:17 +0000"  >&lt;p&gt;Hi Dimtry,&lt;/p&gt;

&lt;p&gt;Thanks a lot. but that&apos;s so wired,&#160;I don&#8217;t think we have such a huge amount of data. so how did it happened?&lt;/p&gt;

&lt;p&gt;Unfortunately, a few hours ago,&#160; another node of this cluster crashed too. so&#160;how to get this cluster back to work is my&#160;priority. could you give me some&#160;solutions? thanks again.&#160;&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/287667/287667_mongodb.log&quot; title=&quot;mongodb.log attached to SERVER-52926&quot;&gt;mongodb.log&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;&#160;this file is&#160;for one hour before this node crashed&lt;/p&gt;

&lt;p&gt;Have a good day.&lt;/p&gt;</comment>
                            <comment id="3497462" author="dmitry.agranat" created="Thu, 19 Nov 2020 13:03:34 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=xuchao528610%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;xuchao528610@gmail.com&quot;&gt;xuchao528610@gmail.com&lt;/a&gt; I will keep looking at the potential cause of the segmentation fault. Can you upload the full &lt;tt&gt;mongod&lt;/tt&gt; log covering the time of the reported event to the same secure location?&lt;/p&gt;</comment>
                            <comment id="3497440" author="dmitry.agranat" created="Thu, 19 Nov 2020 12:44:32 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=xuchao528610%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;xuchao528610@gmail.com&quot;&gt;xuchao528610@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I think this is a rare circumstance where the &lt;tt&gt;Segmentation fault&lt;/tt&gt; you are reporting might just be a symptom and not the cause.&lt;/p&gt;

&lt;p&gt;Looking at your cluster, you have PSA deployment, with &lt;tt&gt;read concern majority = true&lt;/tt&gt; and with the Secondary member being in recovery for the last 70 days. This creates an enormous cache pressure on the Primary which is barely operational with almost 100% cache full. Another indication that the system is struggling is the amount of &lt;tt&gt;cache overflow table entries&lt;/tt&gt; which is 6 billion.&lt;/p&gt;

&lt;p&gt; &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/287951/287951_Screen+Shot+2020-11-19+at+14.33.34.png&quot; width=&quot;100%&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt; &lt;/p&gt;

&lt;p&gt;I do not believe the system under such extreme conditions is supposed to operate w/o issues, you of which you have experienced. For this issue and the overall sizing and tuning of your cluster, we&apos;d like to encourage you to start by asking our community for help by posting on the &lt;a href=&quot;https://community.mongodb.com&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MongoDB Developer Community Forums&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Dima&lt;/p&gt;</comment>
                            <comment id="3497053" author="JIRAUSER1257673" created="Thu, 19 Nov 2020 01:28:44 +0000"  >&lt;p&gt;@Dmitry Agranat&lt;/p&gt;

&lt;p&gt;Hi Dmitry,&lt;/p&gt;

&lt;p&gt;Thanks for your helping. I upload two files (metrics.2020-11-17T21-49-16Z-00000, metrics.interim). maybe will help you to investigate.&#160;&lt;/p&gt;

&lt;p&gt;Thanks,&lt;/p&gt;

&lt;p&gt;Chao&lt;/p&gt;</comment>
                            <comment id="3496714" author="dmitry.agranat" created="Wed, 18 Nov 2020 22:09:03 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=xuchao528610%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;xuchao528610@gmail.com&quot;&gt;xuchao528610@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I think I understand what&apos;s going on here but to validate my theory we&apos;ll also need archived &lt;tt&gt;diagnostic.data&lt;/tt&gt; located under the &lt;tt&gt;dbpath&lt;/tt&gt;. You can upload it into &lt;a href=&quot;https://10gen-httpsupload.s3.amazonaws.com/upload_forms/8a85a0e1-7e90-41fa-ae4f-32a40abc800a.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this secure uploader&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Dima &lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
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                                            <outwardlinks description="duplicates">
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            <issuekey id="1404400">SERVER-49384</issuekey>
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                            <attachment id="287951" name="Screen Shot 2020-11-19 at 14.33.34.png" size="125519" author="dmitry.agranat@mongodb.com" created="Thu, 19 Nov 2020 12:44:12 +0000"/>
                            <attachment id="287970" name="mongodb-1.log" size="2141406" author="xuchao528610@gmail.com" created="Thu, 19 Nov 2020 14:21:35 +0000"/>
                            <attachment id="287974" name="mongodb-2.log" size="2141406" author="xuchao528610@gmail.com" created="Thu, 19 Nov 2020 14:22:17 +0000"/>
                            <attachment id="287667" name="mongodb.log" size="8211" author="xuchao528610@gmail.com" created="Wed, 18 Nov 2020 03:31:47 +0000"/>
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