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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-52530] Mongo v.4.4.1 crash - UnknownError -31803: WT_NOTFOUND</title>
                <link>https://jira.mongodb.org/browse/SERVER-52530</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi, my mongo instance suddenly crashed, can you please take a look at the log and help me to understand why it happened and how to avoid it?&lt;/p&gt;

&lt;p&gt;By restarting the service it seems to work fine like before, it was running since 3 weeks without any problem..&lt;/p&gt;

&lt;p&gt;Thanks, Regards&lt;/p&gt;</description>
                <environment>Debian 10, CPU 48 core, RAM 192GB DDR4, nvme ssd, no high load when it happened.</environment>
        <key id="1530784">SERVER-52530</key>
            <summary>Mongo v.4.4.1 crash - UnknownError -31803: WT_NOTFOUND</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="13201">Fixed</resolution>
                                        <assignee username="dmitry.agranat@mongodb.com">Dmitry Agranat</assignee>
                                    <reporter username="francescop85e@yahoo.it">Francesco Pepe</reporter>
                        <labels>
                    </labels>
                <created>Sat, 31 Oct 2020 18:11:49 +0000</created>
                <updated>Sun, 29 Oct 2023 22:01:02 +0000</updated>
                            <resolved>Wed, 20 Jan 2021 11:41:38 +0000</resolved>
                                    <version>4.4.1</version>
                                    <fixVersion>4.4.3</fixVersion>
                                                        <votes>0</votes>
                                    <watches>16</watches>
                                                                                                                <comments>
                            <comment id="3573181" author="dmitry.agranat" created="Wed, 20 Jan 2021 11:40:54 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=francescop85e%40yahoo.it&quot; class=&quot;user-hover&quot; rel=&quot;francescop85e@yahoo.it&quot;&gt;francescop85e@yahoo.it&lt;/a&gt;, I will go ahead and close this case as the reported issue was fixed in 4.4.3. Please reopen if you still experience the same issue after upgrading to 4.4.3.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Dima&lt;/p&gt;</comment>
                            <comment id="3553589" author="dmitry.agranat" created="Thu, 7 Jan 2021 20:31:21 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=francescop85e%40yahoo.it&quot; class=&quot;user-hover&quot; rel=&quot;francescop85e@yahoo.it&quot;&gt;francescop85e@yahoo.it&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We&apos;ve made some work in 4.4.3 trying to fix this issue. Would be possible for you to try 4.4.3 and provide us with feedback?&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Dima&lt;/p&gt;</comment>
                            <comment id="3501353" author="luke.pearson" created="Sun, 22 Nov 2020 23:34:15 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=francescop85e%40yahoo.it&quot; class=&quot;user-hover&quot; rel=&quot;francescop85e@yahoo.it&quot;&gt;francescop85e@yahoo.it&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I&apos;m sorry to hear that you&apos;re still experiencing these crashes frequently. I&apos;d suggest downgrading to the latest version of 4.2 in the meantime. We&apos;re still working on a fix for this issue, which we believe occurs when a checkpoint is ahead of a reader/writer interacting with the history store, which can result in that reader/writer getting WT_NOTFOUND.&lt;/p&gt;
</comment>
                            <comment id="3501283" author="JIRAUSER1257454" created="Sun, 22 Nov 2020 14:48:30 +0000"  >&lt;p&gt;Please, can you suggest a safe version? Lately it&apos;s happening very often, cannot leave it like this&lt;/p&gt;</comment>
                            <comment id="3497214" author="JIRAUSER1257454" created="Thu, 19 Nov 2020 08:40:49 +0000"  >&lt;p&gt;Thank you, we&apos;re evaluating a downgrade because yesterday it happened again and this is causing some problems. Can you please suggest a version to which downgrade to?&lt;/p&gt;</comment>
                            <comment id="3496030" author="dmitry.agranat" created="Wed, 18 Nov 2020 17:37:52 +0000"  >&lt;p&gt;Thanks for the update &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=francescop85e%40yahoo.it&quot; class=&quot;user-hover&quot; rel=&quot;francescop85e@yahoo.it&quot;&gt;francescop85e@yahoo.it&lt;/a&gt;, we are currently discussing a possible fix to address this issue.&lt;/p&gt;</comment>
                            <comment id="3491343" author="JIRAUSER1257454" created="Mon, 16 Nov 2020 11:01:31 +0000"  >&lt;p&gt;Good morning, yesterday it&#160;unexpectedly crashed again with the same error. I uploaded log files to the secure uploader&lt;/p&gt;</comment>
                            <comment id="3473729" author="JIRAUSER1257454" created="Tue, 3 Nov 2020 15:18:04 +0000"  >&lt;p&gt;Hi, &lt;br/&gt;
thanks for your feedback. I uploaded the diagnostic file till the crash, the next one after restart and a view about used resources when it happened.&lt;/p&gt;

&lt;p&gt;Regards, Francesco&lt;/p&gt;</comment>
                            <comment id="3470728" author="dmitry.agranat" created="Sun, 1 Nov 2020 08:44:14 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=francescop85e%40yahoo.it&quot; class=&quot;user-hover&quot; rel=&quot;francescop85e@yahoo.it&quot;&gt;francescop85e@yahoo.it&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We&apos;ve started looking at this issue. Do you happen to have a core dump from this event? If you do, please upload it to the &lt;a href=&quot;https://10gen-httpsupload.s3.amazonaws.com/upload_forms/4232e304-d2a9-4052-8246-bdece41cb6f9.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;secure uploader&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Can you also upload a full mongod log and the &lt;tt&gt;$dbpath/diagnostic.data&lt;/tt&gt; directory (the contents are described &lt;a href=&quot;https://docs.mongodb.com/manual/administration/analyzing-mongodb-performance/#full-time-diagnostic-data-capture&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;) and upload them to the same &lt;a href=&quot;https://10gen-httpsupload.s3.amazonaws.com/upload_forms/4232e304-d2a9-4052-8246-bdece41cb6f9.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;secure uploader&lt;/a&gt; location?&lt;/p&gt;

&lt;p&gt;Files uploaded to this portal are visible only to MongoDB employees and are routinely deleted after some time.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Dima&lt;/p&gt;</comment>
                    </comments>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1477157">SERVER-50971</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1470939">SERVER-50880</issuekey>
        </issuelink>
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                            <attachment id="285842" name="image-2020-11-05-10-23-25-571.png" size="41451" author="luke.pearson@mongodb.com" created="Wed, 4 Nov 2020 23:23:26 +0000"/>
                            <attachment id="285848" name="image-2020-11-05-11-02-08-836.png" size="7543" author="luke.pearson@mongodb.com" created="Thu, 5 Nov 2020 00:02:10 +0000"/>
                            <attachment id="285233" name="mongo-crash_31-10-20.log" size="22396" author="francescop85e@yahoo.it" created="Sat, 31 Oct 2020 18:02:08 +0000"/>
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