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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-26627] Config server crash after shard removal</title>
                <link>https://jira.mongodb.org/browse/SERVER-26627</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Mongod crashed on 1st config server after removal of a shard from a cluster.&lt;/p&gt;

&lt;p&gt;MongoDB version: 3.0.8.&lt;/p&gt;

&lt;p&gt;Log file on config server shows:&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; got signal 15 (Terminated), will terminate after current cmd ends&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; now exiting&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; shutdown: going to close listening sockets...&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; closing listening socket: 6&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; closing listening socket: 7&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; removing socket file: /tmp/mongodb-27017.sock&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; shutdown: going to flush diaglog...&lt;br/&gt;
2016-10-13T22:13:38.506+0000 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; shutdown: going to close sockets...&lt;br/&gt;
2016-10-13T22:13:38.514+0000 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; WiredTigerKVEngine shutting down&lt;br/&gt;
2016-10-13T22:13:38.532+0000 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn12551&amp;#93;&lt;/span&gt; got request after shutdown()&lt;br/&gt;
2016-10-13T22:13:38.533+0000 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn12550&amp;#93;&lt;/span&gt; got request after shutdown()&lt;br/&gt;
2016-10-13T22:13:38.617+0000 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; shutdown: removing fs lock...&lt;br/&gt;
2016-10-13T22:13:38.617+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;signalProcessingThread&amp;#93;&lt;/span&gt; dbexit:  rc: 0&lt;/p&gt;

&lt;p&gt;Restarting the service failed with permissions errors. It seems like the ownership of few files was changed from mongod:mongod to root:root during or before the crash. Some kind of bug in mongod? I don&apos;t think anyone changed the ownership.&lt;/p&gt;

&lt;p&gt;These are the files with wrong ownership:&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;- 1 root   root     5701900 Oct 13 22:13 mongod.log&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;- 1 root   root      913 Oct 13 22:13 WiredTiger.turtle&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;- 1 root   root   64598272 Oct 13 22:13 WiredTigerLog.0000000452&lt;/p&gt;

&lt;p&gt;This type of crash happened before, where 1st config server crashed after shard removal, but I do not recall if ownership was also broken.&lt;/p&gt;</description>
                <environment></environment>
        <key id="323595">SERVER-26627</key>
            <summary>Config server crash after shard removal</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="-1">Unassigned</assignee>
                                    <reporter username="dabest1">dabest1</reporter>
                        <labels>
                    </labels>
                <created>Fri, 14 Oct 2016 00:08:38 +0000</created>
                <updated>Sat, 15 Oct 2016 23:59:51 +0000</updated>
                            <resolved>Fri, 14 Oct 2016 00:26:33 +0000</resolved>
                                    <version>3.0.8</version>
                                                    <component>Sharding</component>
                    <component>Stability</component>
                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1409552" author="dabest1" created="Sat, 15 Oct 2016 23:59:51 +0000"  >&lt;p&gt;Thank you, I have identified an automated process which has shut down the config server during the downsizing process. However, I think you should still keep this bug open as the ownership of the files was incorrectly set during the shutdown.&lt;/p&gt;</comment>
                            <comment id="1408131" author="thomas.schubert" created="Fri, 14 Oct 2016 00:26:33 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=dabest1&quot; class=&quot;user-hover&quot; rel=&quot;dabest1&quot;&gt;dabest1&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for your report. It appears that the mongo process received a SIGTERM, and shutdown cleanly. I would suggest investigating who or what is sending the SIGTERM.&lt;/p&gt;

&lt;p&gt;Please note that SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion 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-users 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;. A question like this involving more discussion would be best posted on the mongodb-users group.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
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Remove shard from 2 shard cluster.&lt;/p&gt;</customfieldvalue>

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