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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-23562] cluster   hung  a moment  when  use &apos;aaa&apos;  which  not in  the  cluster</title>
                <link>https://jira.mongodb.org/browse/SERVER-23562</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;cluster   hung  a moment  when  use &apos;aaa&apos;  which  not in  the  cluster.&lt;/p&gt;

&lt;p&gt;all connection  will  reconnected.&lt;br/&gt;
log file:&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;2015-12-11T23:59:07.379+0800 I NETWORK [initandlisten] connection accepted from #152741 (103 connections now open)&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;2015-12-11T23:59:07.502+0800 I NETWORK [conn234578] end connection 192.168.20.113:35936 (81 connections now open)&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;2015-12-11T23:59:07.503+0800 I NETWORK [initandlisten] connection accepted from 192.168.20.113:35940 #234582 (82 connections now open)&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;2015-12-11T23:59:08.081+0800 I SHARDING [conn15614] couldn&apos;t find database [aaa] in config db&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;2015-12-11T23:59:08.384+0800 I NETWORK [conn241020] end connection (1418 connections now open)&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;2015-12-11T23:59:08.385+0800 I NETWORK [initandlisten] connection accepted from #241025 (1419 connections now open)&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;2015-12-11T23:59:08.755+0800 I NETWORK [conn132274] end connection (901 connections now open)&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;2015-12-11T23:59:08.755+0800 I NETWORK [initandlisten] connection accepted from #132278 (902 connections now open)&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;environment&lt;br/&gt;
linux: centos 6.5 &lt;br/&gt;
mongo-version:3.0.7 &lt;br/&gt;
filesystem:xfs &lt;br/&gt;
mongod-engine wiredTiger&lt;br/&gt;
configure-engine mmapv1&lt;/p&gt;</description>
                <environment></environment>
        <key id="277793">SERVER-23562</key>
            <summary>cluster   hung  a moment  when  use &apos;aaa&apos;  which  not in  the  cluster</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="liang.zhang@17zuoye.com">ufo ofu</reporter>
                        <labels>
                    </labels>
                <created>Wed, 6 Apr 2016 10:01:07 +0000</created>
                <updated>Tue, 14 Jun 2016 18:16:01 +0000</updated>
                            <resolved>Tue, 14 Jun 2016 18:16:01 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1294027" author="kaloian.manassiev" created="Tue, 14 Jun 2016 18:11:55 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=liang.zhang%4017zuoye.com&quot; class=&quot;user-hover&quot; rel=&quot;liang.zhang@17zuoye.com&quot;&gt;liang.zhang@17zuoye.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;The bug in question (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17917&quot; title=&quot;Config DB gets updated even though the user has no permissions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17917&quot;&gt;&lt;del&gt;SERVER-17917&lt;/del&gt;&lt;/a&gt;) is not going to be backported to 3.0 because of its complexity and due to risk of destabilizing the release. Since it has been fixed in 3.2, if this is a critical issue for you I recommend that you upgrade to the latest release (3.2.7 at the time of this writing) at your earliest convenience.&lt;/p&gt;

&lt;p&gt;Best regards,&lt;br/&gt;
-Kal.&lt;/p&gt;</comment>
                            <comment id="1279257" author="kaloian.manassiev" created="Tue, 31 May 2016 05:22:33 +0000"  >&lt;p&gt;Thank you &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=liang.zhang%4017zuoye.com&quot; class=&quot;user-hover&quot; rel=&quot;liang.zhang@17zuoye.com&quot;&gt;liang.zhang@17zuoye.com&lt;/a&gt; for providing me with the set of indexes. I do not see anything wrong with these indexes so the most likely cause for the stalls when trying to use a non-existent database remains to be &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17917&quot; title=&quot;Config DB gets updated even though the user has no permissions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17917&quot;&gt;&lt;del&gt;SERVER-17917&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Like I mentioned, this bug was fixed in version 3.2, but is still present in 3.0 and earlier versions. Would it be possible that you attempt to reproduce it with the latest 3.2 release and let me know if this helps?&lt;/p&gt;

&lt;p&gt;Best regards,&lt;br/&gt;
-Kal.&lt;/p&gt;
</comment>
                            <comment id="1275796" author="liang.zhang@17zuoye.com" created="Thu, 26 May 2016 02:50:25 +0000"  >&lt;p&gt;This behavior can occur in the cluster:&lt;/p&gt;

&lt;p&gt;A total of five shards&lt;br/&gt;
Each shard has 1 primary 2 secondary 2arb&lt;br/&gt;
Each shard has 800G storage size(snappy  compress)&lt;/p&gt;

&lt;p&gt;mongos&amp;gt; use config&lt;br/&gt;
mongos&amp;gt; db.system.indexes.find()&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.lockpings&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.locks&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ping&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.lockpings&quot;, &quot;name&quot; : &quot;ping_1&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.changelog&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.version&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.settings&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.chunks&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;min&quot; : 1 }
&lt;p&gt;, &quot;unique&quot; : true, &quot;ns&quot; : &quot;config.chunks&quot;, &quot;name&quot; :&quot;ns_1_min_1&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;shard&quot; : 1, &quot;min&quot; : 1 }
&lt;p&gt;, &quot;unique&quot; : true, &quot;ns&quot; : &quot;config.chunks&quot;, &quot;name&quot; : &quot;ns_1_shard_1_min_1&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;lastmod&quot; : 1 }
&lt;p&gt;, &quot;unique&quot; : true, &quot;ns&quot; : &quot;config.chunks&quot;, &quot;name&quot; : &quot;ns_1_lastmod_1&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.shards&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;host&quot; : 1 }
&lt;p&gt;, &quot;unique&quot; : true, &quot;ns&quot; : &quot;config.shards&quot;, &quot;name&quot; : &quot;host_1&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.mongos&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.databases&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.collections&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.tags&quot;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;min&quot; : 1 }
&lt;p&gt;, &quot;unique&quot; : true, &quot;ns&quot; : &quot;config.tags&quot;, &quot;name&quot; : &quot;ns_1_min_1&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;state&quot; : 1, &quot;process&quot; : 1 }
&lt;p&gt;, &quot;ns&quot; : &quot;config.locks&quot;, &quot;name&quot; : &quot;state_1_process_1&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ts&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;ts_1&quot;, &quot;ns&quot; : &quot;config.locks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.actionlog&quot; }&lt;/p&gt;















&lt;p&gt;Another cluster case this phenomenon did not occur&lt;br/&gt;
A total of two shards&lt;br/&gt;
Each shard has 1 primary 1 secondary 1 arb&lt;br/&gt;
Each shard has 100G storage size(snappy  compress)&lt;/p&gt;


&lt;p&gt;mongos&amp;gt; use config&lt;br/&gt;
mongos&amp;gt; db.system.indexes.find()&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.changelog&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.actionlog&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.locks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.chunks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ts&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;ts_1&quot;, &quot;ns&quot; : &quot;config.locks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;state&quot; : 1, &quot;process&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;state_1_process_1&quot;, &quot;ns&quot; : &quot;config.locks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;unique&quot; : true, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;min&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;ns_1_min_1&quot;, &quot;ns&quot; : &quot;config.chunks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;unique&quot; : true, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;shard&quot; : 1, &quot;min&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;ns_1_shard_1_min_1&quot;, &quot;ns&quot; : &quot;config.chunks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;unique&quot; : true, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;lastmod&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;ns_1_lastmod_1&quot;, &quot;ns&quot; : &quot;config.chunks&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.collections&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.lockpings&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.databases&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.mongos&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;ping&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;ping_1&quot;, &quot;ns&quot; : &quot;config.lockpings&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.shards&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;unique&quot; : true, &quot;key&quot; : &lt;/p&gt;
{ &quot;host&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;host_1&quot;, &quot;ns&quot; : &quot;config.shards&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.tags&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;unique&quot; : true, &quot;key&quot; : &lt;/p&gt;
{ &quot;ns&quot; : 1, &quot;min&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;ns_1_min_1&quot;, &quot;ns&quot; : &quot;config.tags&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.settings&quot; }&lt;br/&gt;
{ &quot;v&quot; : 1, &quot;key&quot; : &lt;/p&gt;
{ &quot;_id&quot; : 1 }
&lt;p&gt;, &quot;name&quot; : &quot;&lt;em&gt;id&lt;/em&gt;&quot;, &quot;ns&quot; : &quot;config.version&quot; }&lt;/p&gt;</comment>
                            <comment id="1271708" author="kaloian.manassiev" created="Mon, 23 May 2016 12:55:46 +0000"  >&lt;p&gt;Thanks for the prompt response.&lt;/p&gt;

&lt;p&gt;The metadata operations I am referring to happen against the config.databases collection. How big is it in each of the two clusters you have listed above? Also, this collection should also have index on it for the database name. Can you please run db.getIndexes() and paste the output?&lt;/p&gt;

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

&lt;p&gt;-Kal.&lt;/p&gt;</comment>
                            <comment id="1271610" author="liang.zhang@17zuoye.com" created="Mon, 23 May 2016 11:42:56 +0000"  >&lt;p&gt;Thank you for your answer.&lt;br/&gt;
This behavior can occur in the cluster:&lt;br/&gt;
mongos&amp;gt; db.collections.count()&lt;br/&gt;
5818&lt;br/&gt;
mongos&amp;gt; db.collections.find(&lt;/p&gt;
{&quot;dropped&quot; : false}
&lt;p&gt;).count()&lt;br/&gt;
3936&lt;br/&gt;
mongos&amp;gt; db.chunks.count()&lt;br/&gt;
237463&lt;/p&gt;

&lt;p&gt;Another cluster case this phenomenon did not occur&lt;br/&gt;
mongos&amp;gt; db.collections.count()&lt;br/&gt;
569&lt;br/&gt;
mongos&amp;gt; db.collections.find(&lt;/p&gt;
{&quot;dropped&quot; : false}
&lt;p&gt;).count()&lt;br/&gt;
222&lt;br/&gt;
mongos&amp;gt; db.chunks.count()&lt;br/&gt;
13322&lt;/p&gt;


&lt;p&gt;Is it because  the amount of data  in congfig database&#65311;&lt;/p&gt;</comment>
                            <comment id="1271567" author="kaloian.manassiev" created="Mon, 23 May 2016 10:51:15 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=liang.zhang%4017zuoye.com&quot; class=&quot;user-hover&quot; rel=&quot;liang.zhang@17zuoye.com&quot;&gt;liang.zhang@17zuoye.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Apologies for the delayed response. I tried to reproduce the problem you are experiencing, by accessing an unknown database and I am unable to get any existing shard connections to get reset.&lt;/p&gt;

&lt;p&gt;However, one thing which I noticed is related to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17917&quot; title=&quot;Config DB gets updated even though the user has no permissions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17917&quot;&gt;&lt;del&gt;SERVER-17917&lt;/del&gt;&lt;/a&gt;. Because of this bug, each attempt to read an unknown database will try to find and load that database&apos;s metadata from the config server and if it does not exist there will create it. This is done through a write to the config server. This holds a mongos-wide mutex and if it takes longer because of config server network round trips will stall any concurrent workload running against the same mongos instance.&lt;/p&gt;

&lt;p&gt;My suspicion is that you are experiencing the side effects of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17917&quot; title=&quot;Config DB gets updated even though the user has no permissions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17917&quot;&gt;&lt;del&gt;SERVER-17917&lt;/del&gt;&lt;/a&gt; and not reconnection problems.&lt;/p&gt;

&lt;p&gt;This bug was &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17723&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;fixed&lt;/a&gt; in version 3.2, but is still present in 3.0 and earlier versions. Would it be possible that you attempt to reproduce it with the latest 3.2 release and let me know if still occurs?&lt;/p&gt;

&lt;p&gt;Best regards,&lt;br/&gt;
-Kal.&lt;/p&gt;</comment>
                            <comment id="1229865" author="liang.zhang@17zuoye.com" created="Fri, 8 Apr 2016 04:03:03 +0000"  >&lt;p&gt;environment&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;linux: centos 6.5 &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;mongod       version:3.0.8&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;mongos       version:3.0.8&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;mongo-configure version  :3.0.8 &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;filesystem:xfs &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;mongod-engine wiredTiger&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;configure-engine mmapv1&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;run  command:&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 aaa              (aaa  not in the cluster)&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;show tables        (this  command  caused  the hang) &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;&quot;cluster hung&quot; means  all connection will reconnected at a moment. The client is due to reconnect, resulting in slow operation. The client&apos;s Slow operation is mainly due to reconnect.&lt;/p&gt;

&lt;p&gt;mongos log&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;2016-04-05T18:11:33.486+0800 I SHARDING [conn350462] couldn&apos;t find database [aaa] in config db&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;2016-04-05T18:11:33.538+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:30705 #350466 (1118 connections now open)&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;2016-04-05T18:11:33.589+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:30706 #350467 (1119 connections now open)&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;2016-04-05T18:11:33.613+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:49538 #350468 (1120 connections now open)&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;2016-04-05T18:11:33.622+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:48935 #350469 (1121 connections now open)&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;2016-04-05T18:11:33.625+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:49539 #350470 (1122 connections now open)&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;2016-04-05T18:11:33.632+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:30707 #350471 (1123 connections now open)&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;2016-04-05T18:11:33.660+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:49542 #350472 (1124 connections now open)&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;2016-04-05T18:11:33.661+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:37624 #350473 (1125 connections now open)&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;2016-04-05T18:11:33.669+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:48938 #350474 (1126 connections now open)&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;2016-04-05T18:11:33.672+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:48939 #350475 (1127 connections now open)&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;2016-04-05T18:11:33.674+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:48940 #350476 (1128 connections now open)&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;2016-04-05T18:11:33.676+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:49543 #350477 (1129 connections now open)&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;2016-04-05T18:11:33.678+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:37625 #350478 (1130 connections now open)&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;2016-04-05T18:11:33.681+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:30710 #350479 (1131 connections now open)&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;2016-04-05T18:11:33.681+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:56589 #350480 (1132 connections now open)&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;2016-04-05T18:11:33.683+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:29306 #350481 (1133 connections now open)&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;2016-04-05T18:11:33.685+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:30712 #350482 (1134 connections now open)&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;2016-04-05T18:11:33.685+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:55877 #350483 (1135 connections now open)&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;2016-04-05T18:11:33.689+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:62951 #350484 (1136 connections now open)&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;2016-04-05T18:11:33.691+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:54304 #350485 (1137 connections now open)&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;2016-04-05T18:11:33.692+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:48941 #350486 (1138 connections now open)&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;2016-04-05T18:11:33.698+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:48942 #350487 (1139 connections now open)&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;2016-04-05T18:11:33.702+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:56591 #350488 (1140 connections now open)&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;2016-04-05T18:11:33.706+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:31129 #350489 (1141 connections now open)&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;2016-04-05T18:11:33.706+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:31130 #350490 (1142 connections now open)&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;2016-04-05T18:11:33.714+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:31131 #350491 (1143 connections now open)&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;2016-04-05T18:11:33.716+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:54305 #350492 (1144 connections now open)&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;2016-04-05T18:11:33.719+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:54306 #350493 (1145 connections now open)&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;2016-04-05T18:11:33.719+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:35992 #350494 (1146 connections now open)&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;2016-04-05T18:11:33.720+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:54307 #350495 (1147 connections now open)&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;2016-04-05T18:11:33.723+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:37628 #350496 (1148 connections now open)&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;2016-04-05T18:11:33.730+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:31132 #350497 (1149 connections now open)&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;2016-04-05T18:11:33.733+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:35993 #350498 (1150 connections now open)&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;2016-04-05T18:11:33.733+0800 I NETWORK  [mongosMain] connection accepted from x.x.x.x:30714 #350499 (1151 connections now open)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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			&lt;/tbody&gt;
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&lt;p/&gt;</comment>
                            <comment id="1228038" author="kaloian.manassiev" created="Wed, 6 Apr 2016 18:42:27 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=liang.zhang%4017zuoye.com&quot; class=&quot;user-hover&quot; rel=&quot;liang.zhang@17zuoye.com&quot;&gt;liang.zhang@17zuoye.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Can you please provide the following information to help us better understand the problem you are encountering.&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;The version of mongod and mongos, which you are using and the complete log file from the mongos against which you executed the commands.&lt;/li&gt;
	&lt;li&gt;The exact commands which you ran, which caused the hang.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Also, can you elaborate on what does &quot;cluster hung&quot; means? I.e., did the command timeout or it just got stuck there indefinitely.&lt;/p&gt;

&lt;p&gt;Best regards,&lt;br/&gt;
-Kal.&lt;/p&gt;</comment>
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