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    <title>MongoDB Jira</title>
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    <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-5391] db.group fails on a certain dataset</title>
                <link>https://jira.mongodb.org/browse/SERVER-5391</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This operation fails constantly, I&apos;ve tried to repair using different methods - it&apos;s definitely does not help and the dataset does not seem to be an issue.&lt;/p&gt;

&lt;p&gt;Here&apos;s the stack trace:&lt;/p&gt;

&lt;p&gt;OperationFailure: command SON([(&apos;group&apos;, {&apos;$keyf&apos;: Code(&apos;\nfunction (doc) {\n    return &lt;/p&gt;
{ year: doc.timestamp.substring(0, 4),\n             month: doc.timestamp.substring(4, 6),\n             day: doc.timestamp.substring(6),\n             event: doc.event }
&lt;p&gt;;\n}\n&apos;, {}), &apos;$reduce&apos;: Code(&quot;\nfunction (doc, out) {\n    out.total += doc.total;\n    for (var key in doc.tags) {\n        if (&apos;names&apos; in doc &amp;amp;&amp;amp; key in doc.names) &lt;/p&gt;
{\n            out.names[key] = doc.names[key];\n        }
&lt;p&gt;\n        if (key in out.tags) &lt;/p&gt;
{\n            out.tags[key] += doc.tags[key];\n        }
&lt;p&gt; else &lt;/p&gt;
{\n            out.tags[key] = doc.tags[key];\n        }
&lt;p&gt;\n    }\n}\n&quot;, {}), &apos;ns&apos;: u&apos;statscounters&apos;, &apos;cond&apos;: {&apos;a&apos;: ObjectId(&apos;4f1814c3ba8a48321b0037c5&apos;), &apos;timestamp&apos;: {&apos;$lte&apos;: &apos;20120324&apos;, &apos;$gte&apos;: &apos;20120224&apos;}}, &apos;initial&apos;: {&apos;total&apos;: 0, &apos;names&apos;: {}, &apos;tags&apos;: {}}})]) failed: exception: Invalid BSONObj size: 20517274 (0x9A113901) first element: 0: { year: &quot;2012&quot;, month: &quot;02&quot;, day: &quot;24&quot;, event: &quot;sent&quot;, total: 18.0, names: &lt;/p&gt;
{ betaprogram_signup_email: &quot;betaprogram-signup-email&quot;, gluster_verification: &quot;gluster-verification&quot;, gluster_forgot_password: &quot;gluster-forgot-password&quot;, forgot_password: &quot;forgot-password&quot;, gluster: &quot;gluster&quot;, signup_email: &quot;signup-email&quot;, ash_forgot_password: &quot;ash-forgot-password&quot;, ash: &quot;ash&quot;, betaprogram: &quot;betaprogram&quot;, verification: &quot;verification&quot;, foobar_invite_person: &quot;foobar-invite-person&quot;, betaprogram_provision_email: &quot;betaprogram-provision-email&quot;, foobar: &quot;foobar&quot;, abinash_invite_person: &quot;abinash-invite-person&quot;, invite_person: &quot;invite-person&quot;, provision_email: &quot;provision-email&quot;, abinash: &quot;abinash&quot;, welcome_email: &quot;welcome-email&quot;, betaprogram_welcome_email: &quot;betaprogram-welcome-email&quot; }
&lt;p&gt;, tags: &lt;/p&gt;
{ betaprogram_signup_email: 6.0, gluster_verification: 3.0, gluster_forgot_password: 1.0, forgot_password: 3.0, gluster: 4.0, signup_email: 6.0, ash_forgot_password: 2.0, ash: 2.0, betaprogram: 10.0, verification: 3.0, foobar_invite_person: 1.0, betaprogram_provision_email: 2.0, foobar: 1.0, abinash_invite_person: 1.0, invite_person: 2.0, provision_email: 2.0, abinash: 1.0, welcome_email: 2.0, betaprogram_welcome_email: 2.0 }
&lt;p&gt; }&lt;/p&gt;


&lt;p&gt;We can provide a dataset per request, won&apos;t attach it here as it&apos;s customers stats data that we can not share.&lt;/p&gt;</description>
                <environment>Ubuntu 11.10, 11.04 64 Bit</environment>
        <key id="34596">SERVER-5391</key>
            <summary>db.group fails on a certain dataset</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="mailgun">Ev Kontsevoy</reporter>
                        <labels>
                    </labels>
                <created>Sat, 24 Mar 2012 10:26:58 +0000</created>
                <updated>Wed, 15 Aug 2012 14:24:08 +0000</updated>
                            <resolved>Sat, 24 Mar 2012 14:09:26 +0000</resolved>
                                    <version>2.0.1</version>
                                                    <component>MapReduce</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="103236" author="mailgun" created="Sat, 24 Mar 2012 10:35:26 +0000"  >&lt;p&gt;Ah, please reject the issue - the root cause is that the BSON object is getting too big during the group operation.&lt;/p&gt;</comment>
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