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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-29742] mongodump only creates a partial dump</title>
                <link>https://jira.mongodb.org/browse/SERVER-29742</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I tried to execute mongodump with the -q parameter. &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;   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;mongodump --host localhost --port &lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;27017&lt;/span&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; -c dvc_id_reports -q {time:{$lt:ISODate(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;2016-06-20T00:00:00Z&quot;&lt;/span&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;)}} -d testdb -o ./dump/&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;But it dumps only 241512 documents. (according to ouput of mongodump)&lt;br/&gt;
If i execute the same query with a count-command it returns 828413 documents.&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;db.getCollection(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;dvc_id_reports&apos;&lt;/span&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;).count({time:{$lt:ISODate(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;2016-06-20T00:00:00Z&quot;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;)}})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// or&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.getCollection(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;dvc_id_reports&apos;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;).find({time:{$lt:ISODate(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;2016-06-20T00:00:00Z&quot;&lt;/span&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;)}}).count()&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;But if i use itcount() also return the wrong number of documents (241512):&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;   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.getCollection(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;dvc_id_reports&apos;&lt;/span&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;).find({time:{$lt:ISODate(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;2016-06-20T00:00:00Z&quot;&lt;/span&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;)}}).itcount()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
</description>
                <environment></environment>
        <key id="395999">SERVER-29742</key>
            <summary>mongodump only creates a partial dump</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="3">Duplicate</resolution>
                                        <assignee username="mark.agarunov">Mark Agarunov</assignee>
                                    <reporter username="chi@tractive.com">Christian Indra</reporter>
                        <labels>
                    </labels>
                <created>Tue, 20 Jun 2017 13:24:33 +0000</created>
                <updated>Sat, 29 Jul 2017 16:23:02 +0000</updated>
                            <resolved>Wed, 28 Jun 2017 19:24:05 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1610123" author="chi@tractive.com" created="Thu, 29 Jun 2017 05:26:26 +0000"  >&lt;p&gt;I&apos;m nor sure if it&apos;s the same issue. Because also the mongodump is affected. Not only the count method.&lt;/p&gt;</comment>
                            <comment id="1609013" author="mark.agarunov" created="Wed, 28 Jun 2017 19:23:46 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=chi%40tractive.com&quot; class=&quot;user-hover&quot; rel=&quot;chi@tractive.com&quot;&gt;chi@tractive.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for providing this information. Looking over this, it seems that the behavior you&apos;re seeing is caused by the same issue as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3645&quot; title=&quot;Sharded collection counts (on primary) can report too many results&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3645&quot;&gt;&lt;del&gt;SERVER-3645&lt;/del&gt;&lt;/a&gt; where count returns an incorrect value on sharded setups. I&apos;ve closed this as a duplicate, please watch &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3645&quot; title=&quot;Sharded collection counts (on primary) can report too many results&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3645&quot;&gt;&lt;del&gt;SERVER-3645&lt;/del&gt;&lt;/a&gt; for updates on the progress of this issue.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark &lt;/p&gt;</comment>
                            <comment id="1604953" author="chi@tractive.com" created="Fri, 23 Jun 2017 06:25:57 +0000"  >&lt;p&gt;Now i tried to check the distribution of the data.&lt;br/&gt;
I connected to the primary mongod node of every shard and executed the count query. And all data is really just in one mongod:&lt;br/&gt;
stage-mongo15: 0&lt;br/&gt;
stage-mongo16: 0&lt;br/&gt;
stage-mongo17: 830504&lt;/p&gt;

&lt;p&gt;And here on the mongod-host it doesn&apos;t matter which command i use:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;find(...).count() return 830504&lt;/li&gt;
	&lt;li&gt;find(...).itcount() return 830504&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;So it&apos;s just not working when i use the mongos for the same query.&lt;/p&gt;

&lt;p&gt;Note: The numbers a slightly different, because i used a different day for the query.&lt;/p&gt;</comment>
                            <comment id="1604942" author="chi@tractive.com" created="Fri, 23 Jun 2017 06:11:04 +0000"  >&lt;p&gt;I have 3 shards. I have attached the logs of the primary of each shard and the mongos that where used by mongodump.&lt;/p&gt;</comment>
                            <comment id="1604652" author="mark.agarunov" created="Thu, 22 Jun 2017 20:45:29 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=chi%40tractive.com&quot; class=&quot;user-hover&quot; rel=&quot;chi@tractive.com&quot;&gt;chi@tractive.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for the report. So that we can further investigate the behavior of mongodump described, could you please provide the complete log files from &lt;tt&gt;mongod&lt;/tt&gt; from the affected nodes when this issue occurred. This may give some more insight into why there is a discrepancy between the number of documents returned. &lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="21174">SERVER-3645</issuekey>
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                <attachments>
                            <attachment id="159321" name="mongos-stage-mongo15.txt" size="7730" author="chi@tractive.com" created="Fri, 23 Jun 2017 06:10:09 +0000"/>
                            <attachment id="159324" name="shard1_primary-stage-mongo15.txt" size="3761" author="chi@tractive.com" created="Fri, 23 Jun 2017 06:10:09 +0000"/>
                            <attachment id="159323" name="shard2_primary-stage-mongo17.txt" size="7191" author="chi@tractive.com" created="Fri, 23 Jun 2017 06:10:09 +0000"/>
                            <attachment id="159322" name="shard3_primary-stage-mongo16.txt" size="3826" author="chi@tractive.com" created="Fri, 23 Jun 2017 06:10:09 +0000"/>
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