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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-54380] Error processing TTL index for &quot;config.system.sessions</title>
                <link>https://jira.mongodb.org/browse/SERVER-54380</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;We regularly see message in the log:&lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;config.system.sessions is a system collection. What can be done to fix the problem? &lt;/p&gt;</description>
                <environment>CentOS Linux release 7.8.2003</environment>
        <key id="1615881">SERVER-54380</key>
            <summary>Error processing TTL index for &quot;config.system.sessions</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="4">Incomplete</resolution>
                                        <assignee username="edwin.zhou@mongodb.com">Edwin Zhou</assignee>
                                    <reporter username="kkrasnov@gmail.com">Konstantin Krasnov</reporter>
                        <labels>
                    </labels>
                <created>Mon, 8 Feb 2021 09:30:56 +0000</created>
                <updated>Wed, 24 Mar 2021 15:47:13 +0000</updated>
                            <resolved>Wed, 24 Mar 2021 15:47:13 +0000</resolved>
                                    <version>4.4.2</version>
                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3681708" author="JIRAUSER1257066" created="Wed, 24 Mar 2021 15:47:13 +0000"  >&lt;p&gt;HI &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=akostadinov&quot; class=&quot;user-hover&quot; rel=&quot;akostadinov&quot;&gt;akostadinov&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We&apos;d like to see if this issue persists when using 4.4.4 and running &lt;tt&gt;--repair&lt;/tt&gt;. Since you&apos;re currently unable to do that, I will go ahead and close this ticket. Once you&apos;re able to perform the upgrade and you continue to observe this behavior, you may reopen this ticket and we will be happy to continue the investigation.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="3670605" author="JIRAUSER1257947" created="Thu, 18 Mar 2021 07:10:20 +0000"  >&lt;p&gt;Hi Edwin,&lt;/p&gt;

&lt;p&gt;We can&apos;t stop the MongoDB.&lt;/p&gt;</comment>
                            <comment id="3668837" author="JIRAUSER1257066" created="Wed, 17 Mar 2021 14:08:44 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kkrasnov%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;kkrasnov@gmail.com&quot;&gt;kkrasnov@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We&apos;re you able to resolve your issue by copying your $dbpath and trying &lt;a href=&quot;https://docs.mongodb.com/manual/reference/program/mongod/#cmdoption-mongod-repair&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;mongod --repair&lt;/tt&gt;&lt;/a&gt; using the latest version of MongoDB?&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="3635569" author="JIRAUSER1257066" created="Thu, 25 Feb 2021 18:05:47 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kkrasnov%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;kkrasnov@gmail.com&quot;&gt;kkrasnov@gmail.com&lt;/a&gt;, and thank you for your patience while we investigate this issue.&lt;/p&gt;

&lt;p&gt;This error suggests a mismatch between collection and index data. This appears to be an in-memory problem with the same root cause as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50971&quot; title=&quot;Invariant failure, WT_NOTFOUND: item not found&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50971&quot;&gt;&lt;del&gt;SERVER-50971&lt;/del&gt;&lt;/a&gt; with a slightly different symptom. Fortunately, there&apos;s no indication of persisted data corruption.&lt;/p&gt;

&lt;p&gt;We recommend upgrading to MongoDB 4.4.4. If the problem continues, there may be a persisted index inconsistency. First, make a complete copy of the database&apos;s $dbpath directory to safeguard so that you can work off of the current $dbpath. Then, try &lt;a href=&quot;https://docs.mongodb.com/manual/reference/program/mongod/#cmdoption-mongod-repair&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;mongod --repair&lt;/tt&gt;&lt;/a&gt; using the latest version of MongoDB.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
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