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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-17326] Data got removed for wrong date range </title>
                <link>https://jira.mongodb.org/browse/SERVER-17326</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We have a sharded cluster with below config - &lt;/p&gt;

&lt;p&gt;2 Sharded servers (shard-db1, shard-db2)&lt;br/&gt;
3 Config servers (on servers shard-db1, shard-db2 and app1)&lt;br/&gt;
2 MongoS servers (app1, app2)&lt;/p&gt;

&lt;p&gt;and collection position is sharded across shard-db1 and shard-db2&lt;/p&gt;

&lt;p&gt;Week back. a very strange thing happened:&lt;/p&gt;

&lt;p&gt;As per line no, 379 (shardA.log) - a command was fired for deleting records for some range, as: &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;2015-02-11T04:56:35.564-0500 [conn52] remove ds-db.position query: { dt: { $gte: new Date(1412136000000), $lte: new Date(1424840400000) } } keyUpdates:0 numYields:0 locks(micros) w:169 234ms&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 as per line - 603 (shardA.log), records were deleted for much larger date range, as&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;2015-02-11T05:27:15.556-0500 [conn43] remove ds-db.position query: { dt: { $gte: new Date(1364702400000), $lte: new Date(1424840400000) } } ndeleted:2375989 keyUpdates:0 numYields:37161 locks(micros) w:3561770402 2200618ms&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;Also, in ShardB.log &lt;br/&gt;
where this command took approx 90 mins. &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;2015-02-11T06:30:11.176-0500 [conn45] remove ds-db.position query: { dt: { $gte: new Date(1364702400000), $lte: new Date(1424840400000) } } ndeleted:5822749 keyUpdates:0 numYields:110266 locks(micros) w:6417752235 5976240ms&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;So no clue how does the delete command picked start date as: 1364702400000 instead of 1412136000000&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;</description>
                <environment></environment>
        <key id="185064">SERVER-17326</key>
            <summary>Data got removed for wrong date range </summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="asya.kamsky@mongodb.com">Asya Kamsky</assignee>
                                    <reporter username="itsmejainh">Himanshu Jain</reporter>
                        <labels>
                    </labels>
                <created>Thu, 19 Feb 2015 11:28:12 +0000</created>
                <updated>Thu, 14 Apr 2016 15:19:30 +0000</updated>
                            <resolved>Fri, 20 Feb 2015 21:10:33 +0000</resolved>
                                    <version>2.6.1</version>
                                                    <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="833989" author="asya" created="Fri, 20 Feb 2015 21:09:32 +0000"  >&lt;p&gt;There is not two different outputs per command for this operation, the mongod only logs an operation when it finishes (and records how long the operation took, so you can determine when it was issued by subtracting duration from the timestamp of the log line).   If you do the calculation, the command that finished at 5:27 was started around 4:51 (i.e. five minutes before the command at 4:56, which took less than a second).&lt;/p&gt;</comment>
                            <comment id="833348" author="itsmejainh" created="Fri, 20 Feb 2015 06:38:18 +0000"  >&lt;p&gt;Thanks for prompt reply.&lt;/p&gt;

&lt;p&gt;So you mean to say two log statements in file - shardA.log  (04:56 and 05:27) are outputs of two different commands. &lt;/p&gt;

&lt;p&gt;Because I assumed 04:56 log says which command was issued &lt;br/&gt;
and 05:27 log says what was the output of command ?&lt;/p&gt;

&lt;p&gt;If that&apos;s not the case, Is there also a log of command issued just like its there for command outputs ?&lt;/p&gt;

&lt;p&gt;Thanks.&lt;/p&gt;

</comment>
                            <comment id="832936" author="asya" created="Thu, 19 Feb 2015 19:21:43 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=himanshu.j89%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;himanshu.j89@gmail.com&quot;&gt;himanshu.j89@gmail.com&lt;/a&gt; the logs show two separate commands issues.   First one was issued at 2015-02-11T04:51 or so and ran for 99 minutes on one shard and 37 minutes on the other, but the second command was issued at 2015-02-11T04:56 and that one finished quickly (because there were no matching documents by that time).&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="65201" name="shardA.log" size="175242" author="itsmejainh" created="Thu, 19 Feb 2015 11:28:12 +0000"/>
                            <attachment id="65202" name="shardB.log" size="231022" author="itsmejainh" created="Thu, 19 Feb 2015 11:28:12 +0000"/>
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