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<channel>
    <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-26535] result of collection count function does not equals with result of aggregate count function</title>
                <link>https://jira.mongodb.org/browse/SERVER-26535</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;evn description:&lt;br/&gt;
standalone database.&lt;br/&gt;
6 document data exists in collection.&lt;/p&gt;

&lt;p&gt;but we got two different results via pure count function and aggregate count function according to below docs.&lt;br/&gt;
&lt;a href=&quot;https://docs.mongodb.com/manual/reference/command/count/#dbcmd.count&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/reference/command/count/#dbcmd.count&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I&apos;m not sure whether this is a bug or my command is wrong.&lt;/p&gt;
</description>
                <environment>db.version() = 3.2.8&lt;br/&gt;
db.serverBuildInfo() as below&lt;br/&gt;
&lt;br/&gt;
{&lt;br/&gt;
	&amp;quot;allocator&amp;quot; : &amp;quot;tcmalloc&amp;quot;,&lt;br/&gt;
	&amp;quot;bits&amp;quot; : 64,&lt;br/&gt;
	&amp;quot;buildEnvironment&amp;quot; : {&lt;br/&gt;
		&amp;quot;cc&amp;quot; : &amp;quot;cl: Microsoft (R) C/C++ Optimizing Compiler Version 18.00.31101 for x64&amp;quot;,&lt;br/&gt;
		&amp;quot;ccflags&amp;quot; : &amp;quot;/nologo /EHsc /W3 /wd4355 /wd4800 /wd4267 /wd4244 /wd4290 /wd4068 /wd4351 /we4013 /we4099 /we4930 /Z7 /errorReport:none /MD /O2 /Oy- /Gw /Gy /Zc:inline&amp;quot;,&lt;br/&gt;
		&amp;quot;cxx&amp;quot; : &amp;quot;cl: Microsoft (R) C/C++ Optimizing Compiler Version 18.00.31101 for x64&amp;quot;,&lt;br/&gt;
		&amp;quot;cxxflags&amp;quot; : &amp;quot;/TP&amp;quot;,&lt;br/&gt;
		&amp;quot;distarch&amp;quot; : &amp;quot;x86_64&amp;quot;,&lt;br/&gt;
		&amp;quot;distmod&amp;quot; : &amp;quot;2008plus-ssl&amp;quot;,&lt;br/&gt;
		&amp;quot;linkflags&amp;quot; : &amp;quot;/nologo /DEBUG /INCREMENTAL:NO /LARGEADDRESSAWARE /OPT:REF&amp;quot;,&lt;br/&gt;
		&amp;quot;target_arch&amp;quot; : &amp;quot;x86_64&amp;quot;,&lt;br/&gt;
		&amp;quot;target_os&amp;quot; : &amp;quot;windows&amp;quot;&lt;br/&gt;
	},&lt;br/&gt;
	&amp;quot;debug&amp;quot; : false,&lt;br/&gt;
	&amp;quot;gitVersion&amp;quot; : &amp;quot;ed70e33130c977bda0024c125b56d159573dbaf0&amp;quot;,&lt;br/&gt;
	&amp;quot;javascriptEngine&amp;quot; : &amp;quot;mozjs&amp;quot;,&lt;br/&gt;
	&amp;quot;maxBsonObjectSize&amp;quot; : 16777216,&lt;br/&gt;
	&amp;quot;modules&amp;quot; : [ ],&lt;br/&gt;
	&amp;quot;ok&amp;quot; : 1,&lt;br/&gt;
	&amp;quot;openssl&amp;quot; : {&lt;br/&gt;
		&amp;quot;compiled&amp;quot; : &amp;quot;OpenSSL 1.0.1p-fips 9 Jul 2015&amp;quot;,&lt;br/&gt;
		&amp;quot;running&amp;quot; : &amp;quot;OpenSSL 1.0.1p-fips 9 Jul 2015&amp;quot;&lt;br/&gt;
	},&lt;br/&gt;
	&amp;quot;storageEngines&amp;quot; : [&lt;br/&gt;
		&amp;quot;devnull&amp;quot;,&lt;br/&gt;
		&amp;quot;ephemeralForTest&amp;quot;,&lt;br/&gt;
		&amp;quot;mmapv1&amp;quot;,&lt;br/&gt;
		&amp;quot;wiredTiger&amp;quot;&lt;br/&gt;
	],&lt;br/&gt;
	&amp;quot;sysInfo&amp;quot; : &amp;quot;deprecated&amp;quot;,&lt;br/&gt;
	&amp;quot;targetMinOS&amp;quot; : &amp;quot;Windows 7/Windows Server 2008 R2&amp;quot;,&lt;br/&gt;
	&amp;quot;version&amp;quot; : &amp;quot;3.2.8&amp;quot;,&lt;br/&gt;
	&amp;quot;versionArray&amp;quot; : [&lt;br/&gt;
		3,&lt;br/&gt;
		2,&lt;br/&gt;
		8,&lt;br/&gt;
		0&lt;br/&gt;
	]&lt;br/&gt;
}</environment>
        <key id="322254">SERVER-26535</key>
            <summary>result of collection count function does not equals with result of aggregate count function</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="kelsey.schubert@mongodb.com">Kelsey Schubert</assignee>
                                    <reporter username="8666592@qq.com">jacky chen</reporter>
                        <labels>
                    </labels>
                <created>Sun, 9 Oct 2016 01:43:53 +0000</created>
                <updated>Mon, 3 Apr 2023 16:45:27 +0000</updated>
                            <resolved>Tue, 11 Oct 2016 13:25:37 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1405067" author="thomas.schubert" created="Tue, 11 Oct 2016 13:25:37 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=update0412&quot; class=&quot;user-hover&quot; rel=&quot;update0412&quot;&gt;update0412&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I&apos;m glad that running &lt;tt&gt;validate&lt;/tt&gt; resolved this issue. Following an unclean shutdown, it is expected that these counts may be off by some amount. The validate command steps through the documents and indexes and performs a number of checks on them. As part of this process, the recordstore count is updated.&lt;/p&gt;

&lt;p&gt;Feel free to take a look at the relevant source code for additional information:&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.2.10/src/mongo/db/storage/wiredtiger/wiredtiger_record_store.cpp#L1550&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.2.10/src/mongo/db/storage/wiredtiger/wiredtiger_record_store.cpp#L1550&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.2.10/src/mongo/db/catalog/collection.cpp#L963&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.2.10/src/mongo/db/catalog/collection.cpp#L963&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.2.10/src/mongo/db/exec/count.cpp#L75&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.2.10/src/mongo/db/exec/count.cpp#L75&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Please note that SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-users group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;. A question like this involving more discussion would be best posted on the mongodb-users group.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1404804" author="8666592@qq.com" created="Tue, 11 Oct 2016 01:23:21 +0000"  >&lt;p&gt;Hi Thomas,&lt;/p&gt;

&lt;p&gt;Thanks for your quick reply.&lt;/p&gt;

&lt;p&gt;I try to execute db.system.users.validate(true) and then count() returns correct value.&lt;/p&gt;

&lt;p&gt;below is validate print&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;&amp;gt; db.system.users.validate(true)&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;   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;{&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;   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;        &quot;ns&quot; : &quot;admin.system.users&quot;,&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;   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;        &quot;nrecords&quot; : 6,&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;   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;        &quot;nIndexes&quot; : 2,&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;   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;        &quot;keysPerIndex&quot; : {&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;   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;                &quot;admin.system.users.$_id_&quot; : 6,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                &quot;admin.system.users.$user_1_db_1&quot; : 6&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;   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;        },&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;   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;        &quot;indexDetails&quot; : {&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;   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;                &quot;admin.system.users.$_id_&quot; : {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                        &quot;valid&quot; : true&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                },&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                &quot;admin.system.users.$user_1_db_1&quot; : {&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;   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;                        &quot;valid&quot; : true&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;   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;                }&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;   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;        },&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;   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;        &quot;valid&quot; : true,&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;   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;        &quot;errors&quot; : [ ],&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;   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;        &quot;ok&quot; : 1&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;}&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;Could you share more detials about the validate functionality ? &lt;br/&gt;
since only system.users and system.version happen this problem, counting collectoins created by me is correct.&lt;/p&gt;

&lt;p&gt;thanks a lot.&lt;/p&gt;

&lt;p&gt;B.R.&lt;br/&gt;
Jacky &lt;/p&gt;</comment>
                            <comment id="1404063" author="thomas.schubert" created="Mon, 10 Oct 2016 13:41:11 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=update0412&quot; class=&quot;user-hover&quot; rel=&quot;update0412&quot;&gt;update0412&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for reporting this behavior. Would you please provide the output of &lt;a href=&quot;https://docs.mongodb.com/manual/reference/method/db.collection.validate/#db.collection.validate&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;db.system.users.validate()&lt;/tt&gt;&lt;/a&gt;? And confirm if the issue is &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;resolved&lt;/a&gt;?&lt;/p&gt;

&lt;p&gt;Please be aware that validate is resource intensive and may have an impact on the performance of your MongoDB instance.&lt;/p&gt;

&lt;p&gt;Thank you,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1403690" author="8666592@qq.com" created="Sun, 9 Oct 2016 01:53:36 +0000"  >&lt;p&gt;collection is admin.system.users&lt;/p&gt;</comment>
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but aggregate count as below shows 6&lt;/p&gt;
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