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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-38786] Invariant failure Hit a MONGO_UNREACHABLE! src/mongo/db/query/collation/collation_spec.cpp 75</title>
                <link>https://jira.mongodb.org/browse/SERVER-38786</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi,&#160;&lt;/p&gt;

&lt;p&gt;mongodb suddenly stopped with the following error logs.&lt;/p&gt;

&lt;p&gt;2018-12-27T07:26:33.336+0000 &lt;b&gt;F&lt;/b&gt; -&#160; &#160; &#160; &#160; &lt;span class=&quot;error&quot;&gt;&amp;#91;conn443555&amp;#93;&lt;/span&gt; Invariant failure Hit a MONGO_UNREACHABLE! src/mongo/db/query/collation/collation_spec.cpp 75&lt;/p&gt;

&lt;p&gt;2018-12-27T07:26:33.336+0000 &lt;b&gt;F&lt;/b&gt; -&#160; &#160; &#160; &#160; &lt;span class=&quot;error&quot;&gt;&amp;#91;conn443555&amp;#93;&lt;/span&gt; &lt;/p&gt;

&lt;p&gt;2018-12-27T07:26:33.419+0000 &lt;b&gt;F&lt;/b&gt; -&#160; &#160; &#160; &#160; &lt;span class=&quot;error&quot;&gt;&amp;#91;conn443555&amp;#93;&lt;/span&gt; Got signal: 6 (Aborted).&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment>Ubuntu 16.04, PyMongo3.5</environment>
        <key id="661844">SERVER-38786</key>
            <summary>Invariant failure Hit a MONGO_UNREACHABLE! src/mongo/db/query/collation/collation_spec.cpp 75</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="daniel.hatcher@mongodb.com">Danny Hatcher</assignee>
                                    <reporter username="ravi.pithadiya">ravi pithadiya</reporter>
                        <labels>
                    </labels>
                <created>Thu, 27 Dec 2018 07:38:49 +0000</created>
                <updated>Thu, 28 Feb 2019 21:07:42 +0000</updated>
                            <resolved>Thu, 28 Feb 2019 21:07:42 +0000</resolved>
                                    <version>3.4.0</version>
                                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2166723" author="daniel.hatcher" created="Thu, 28 Feb 2019 21:07:35 +0000"  >&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;We haven&#8217;t heard back from you for some time, so I&#8217;m going to mark this ticket as resolved. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;

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

&lt;p&gt;Danny&lt;/p&gt;</comment>
                            <comment id="2135006" author="daniel.hatcher" created="Fri, 1 Feb 2019 16:49:18 +0000"  >&lt;p&gt;Hi Ravi,&lt;/p&gt;

&lt;p&gt;We still need additional information to diagnose the problem. If this is still an issue for you, would you please check the Collation documents for the &lt;tt&gt;caseFirst&lt;/tt&gt; field?&lt;/p&gt;

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

&lt;p&gt;Danny&lt;/p&gt;</comment>
                            <comment id="2103304" author="daniel.hatcher" created="Wed, 2 Jan 2019 17:16:48 +0000"  >&lt;p&gt;Hello Ravi,&lt;/p&gt;

&lt;p&gt;Thank you for the extended logs. This invariant occurs when the &lt;tt&gt;caseFirst&lt;/tt&gt; field in a &lt;a href=&quot;https://docs.mongodb.com/manual/reference/collation/index.html#collation-document&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Collation document&lt;/a&gt; is not set to one of the three values of &quot;upper&quot;, &quot;lower&quot;, or &quot;off&quot;. Unfortunately I cannot tell against which namespace the query that triggered the problem was run.&lt;/p&gt;

&lt;p&gt;For any operations, indexes, or collections that have collations, can you please check the &lt;a href=&quot;https://docs.mongodb.com/manual/reference/collation/index.html#collation-document&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Collation documents&lt;/a&gt; for the &lt;tt&gt;caseFirst&lt;/tt&gt; field to see if there are any discrepancies?&lt;/p&gt;

&lt;p&gt;Thank you,&lt;/p&gt;

&lt;p&gt;Danny&lt;/p&gt;</comment>
                            <comment id="2102017" author="ravi.pithadiya" created="Sat, 29 Dec 2018 07:18:22 +0000"  >&lt;p&gt;Hi Daniel,&lt;/p&gt;

&lt;p&gt;here is the link to the requested logs file.&#160;&lt;a href=&quot;https://drive.google.com/open?id=1f5DEMR6gTSlljO_J_yW3-x6aifyx0az_&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://drive.google.com/open?id=1f5DEMR6gTSlljO_J_yW3-x6aifyx0az_&lt;/a&gt;&lt;/p&gt;

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

{ name : ravi pithadiya | principal engineer, phone : 8401253847, linkedin : ravi pithadiya &amp;lt;https://www.linkedin.com/in/ravi-pithadiya-0199b120/&amp;gt;, skype : ravi.pithadiya }

&lt;p&gt;On Fri, Dec 28, 2018 at 8:35 PM Daniel Hatcher (Jira) &amp;lt;jira@mongodb.org&amp;gt;&lt;/p&gt;</comment>
                            <comment id="2101637" author="daniel.hatcher" created="Fri, 28 Dec 2018 15:04:09 +0000"  >&lt;p&gt;Hello Ravi,&lt;/p&gt;

&lt;p&gt;Can you please attach the &lt;tt&gt;mongod&lt;/tt&gt; log covering the timeframe right before the query run through the crash?&lt;/p&gt;

&lt;p&gt;Thank you,&lt;/p&gt;

&lt;p&gt;Danny&lt;/p&gt;</comment>
                            <comment id="2101435" author="ravi.pithadiya" created="Fri, 28 Dec 2018 05:31:59 +0000"  >&lt;p&gt;Hi Kevin,&lt;/p&gt;

&lt;p&gt;It is just a simple aggregate project query.&lt;/p&gt;

&lt;p&gt;I have attached the query in txt file.&lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/204869/204869_amzissue.txt&quot; title=&quot;amzissue.txt attached to SERVER-38786&quot;&gt;amzissue.txt&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;

&lt;p&gt;mongodb service stops as soon as we execute the query.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="2101189" author="kevin.albertson" created="Thu, 27 Dec 2018 20:06:44 +0000"  >&lt;p&gt;Hi Ravi,&lt;/p&gt;

&lt;p&gt;Thank you for the bug report, but the CXX project is for the MongoDB C++ driver. I&apos;m moving this ticket to the SERVER project.&lt;/p&gt;

&lt;p&gt;Can you provide steps to reproduce this? What operations led to this invariant failure?&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Kevin&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="204869" name="amzissue.txt" size="2063" author="ravi.pithadiya" created="Fri, 28 Dec 2018 05:30:56 +0000"/>
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