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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>
    </build-info>


<item>
            <title>[SERVER-26802] MongoCollection.Count() is not correct</title>
                <link>https://jira.mongodb.org/browse/SERVER-26802</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I do not know how to reproduce the problem collection,&lt;br/&gt;
So I send you my test database and run.bat file.&lt;br/&gt;
In my MongoBooster Database,there are two Collection&lt;br/&gt;
places and place2 , you will find there are 2 records in it.&lt;br/&gt;
But the first collection Status Count is 1 while the second is 2.&lt;/p&gt;

&lt;p&gt;I also send you the hardcopy of MongoBooster.&lt;br/&gt;
You can find the document is 2,and the number beside the Colname is (1)&lt;/p&gt;
</description>
                <environment></environment>
        <key id="327213">SERVER-26802</key>
            <summary>MongoCollection.Count() is not correct</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="MagicHu">Hu</reporter>
                        <labels>
                    </labels>
                <created>Thu, 27 Oct 2016 01:11:10 +0000</created>
                <updated>Thu, 27 Oct 2016 05:40:10 +0000</updated>
                            <resolved>Thu, 27 Oct 2016 02:17:20 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1419143" author="magichu" created="Thu, 27 Oct 2016 05:40:10 +0000"  >&lt;p&gt;Great!&lt;br/&gt;
The problem disappered after avlidate command!&lt;/p&gt;</comment>
                            <comment id="1419077" author="stennie" created="Thu, 27 Oct 2016 02:17:20 +0000"  >&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;Thank you for providing log files and a sample database to demonstrate the problem.&lt;/p&gt;

&lt;p&gt;From the log file it appears you had an unclean shutdown, which can result in WiredTiger collection counts being inaccurate.&lt;/p&gt;

&lt;p&gt;Fast collection counts in WiredTiger (i.e. counts without a query predicate) are only periodically persisted, so following an unclean shutdown you may need to validate the collection stats to true up counts: &lt;a href=&quot;https://docs.mongodb.com/manual/reference/method/db.collection.count/#accuracy-after-unexpected-shutdown&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/reference/method/db.collection.count/#accuracy-after-unexpected-shutdown&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;For your specific case, you could run:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  use MongoBooster&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  db.places.validate(true)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Additionally, I noticed you have disabled the journal which may result in some data modifications being lost in the event of unexpected shutdown: &lt;a href=&quot;https://docs.mongodb.com/manual/core/wiredtiger/#storage-wiredtiger-journal&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/core/wiredtiger/#storage-wiredtiger-journal&lt;/a&gt;. I would generally recommend leaving the journal enabled.&lt;/p&gt;

&lt;p&gt;Note: the SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion, please post on the mongodb-user group (&lt;a href=&quot;https://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://groups.google.com/group/mongodb-user&lt;/a&gt;) or Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Stephen&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="142592" name="TestCSharp1812.PNG" size="121899" author="MagicHu" created="Thu, 27 Oct 2016 01:11:10 +0000"/>
                            <attachment id="142591" name="TestCSharp1812.zip" size="464189" author="MagicHu" created="Thu, 27 Oct 2016 01:11:10 +0000"/>
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                            <customfieldvalue>&lt;p&gt;unzip the TestCSharp1812.&lt;br/&gt;
Edit the bat file and run the bat file.&lt;br/&gt;
MongoBooster places contains 2 records,but the status of collection,count is 1.&lt;/p&gt;</customfieldvalue>

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