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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-8889] Missing &apos;connection accepted&apos; entry in mongos log</title>
                <link>https://jira.mongodb.org/browse/SERVER-8889</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Trying to get to the bottom of &lt;a href=&quot;https://jira.mongodb.org/browse/PYTHON-482&quot; title=&quot;Sockets sometimes lockup for 10mins+&quot; class=&quot;issue-link&quot; data-issue-key=&quot;PYTHON-482&quot;&gt;&lt;del&gt;PYTHON-482&lt;/del&gt;&lt;/a&gt; where sockets block forever in read from a mongos on a sharded cluster.  We came across an instance where the mongos log appears to be missing events.&lt;/p&gt;

&lt;p&gt;The mongos log we have contains these entries (no events have been chopped):&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;
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						&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;Wed Mar  6 16:47:56 [conn4706]  authenticate db: admin { authenticate: 1, nonce: &quot;616360f77e999eb6&quot;, user: &quot;ahldev&quot;, key: &quot;ca1a6a071af25060bae233a30e9c8e6d&quot; }&lt;/span&gt;&lt;/pre&gt;
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				&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;Wed Mar  6 16:48:00 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; acquired, ts : 5137733f7bb46eb6d5eed4f5&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;Wed Mar  6 16:48:00 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; unlocked. &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;Wed Mar  6 16:48:18 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; acquired, ts : 513773527bb46eb6d5eed4f6&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;Wed Mar  6 16:48:18 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; unlocked. &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;Wed Mar  6 16:48:24 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; acquired, ts : 513773587bb46eb6d5eed4f7&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;Wed Mar  6 16:48:24 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; unlocked. &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;Wed Mar  6 16:48:41 [conn4706] end connection 127.0.0.1:54309 (2 connections now open)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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						&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;Wed Mar  6 16:48:54 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; acquired, ts : 513773767bb46eb6d5eed4f8&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;Wed Mar  6 16:48:54 [Balancer] distributed lock &apos;balancer/dlonapahls200.maninvestments.com:27119:1362572650:1804289383&apos; unlocked. &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;Wed Mar  6 16:49:08 [mongosMain] connection accepted from 127.0.0.1:54624 #4707 (3 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;Wed Mar  6 16:49:08 [conn4707] end connection 127.0.0.1:54624 (2 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;Wed Mar  6 16:49:08 [mongosMain] connection accepted from 127.0.0.1:54625 #4708 (3 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;Wed Mar  6 16:49:08 [conn4708]  authenticate db: admin { authenticate: 1, nonce: &quot;c9a6ca2e71b590a7&quot;, user: &quot;ahldev&quot;, key: &quot;2f864d0041a557ff0dfdae6a472d22d0&quot; }&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;Note there is no line: &lt;span class=&quot;error&quot;&gt;&amp;#91;mongosMain&amp;#93;&lt;/span&gt; connection accepted from x.x.x.x:y #4707 &lt;/p&gt;</description>
                <environment></environment>
        <key id="67612">SERVER-8889</key>
            <summary>Missing &apos;connection accepted&apos; entry in mongos log</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="sam.helman@10gen.com">sam.helman@10gen.com</assignee>
                                    <reporter username="jblackburn">James Blackburn</reporter>
                        <labels>
                    </labels>
                <created>Thu, 7 Mar 2013 11:38:23 +0000</created>
                <updated>Fri, 8 Mar 2013 18:13:03 +0000</updated>
                            <resolved>Fri, 8 Mar 2013 15:44:30 +0000</resolved>
                                    <version>2.2.1</version>
                                                    <component>Diagnostics</component>
                    <component>Logging</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="284344" author="jblackburn" created="Fri, 8 Mar 2013 15:28:45 +0000"  >&lt;p&gt;We&apos;re upgrading to 2.2.3 today.&lt;/p&gt;

&lt;p&gt;Looks like I was being blind in that logfile - the connection is created immediately before it is closed.  Sorry for the noise, please close this issue.&lt;/p&gt;</comment>
                            <comment id="284322" author="sam.helman@10gen.com" created="Fri, 8 Mar 2013 15:09:23 +0000"  >&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;To make sure we understand correctly, is that the very beginning of the mongos log (from when it came up)?  This is where the log starts in &lt;a href=&quot;https://jira.mongodb.org/browse/PYTHON-482&quot; title=&quot;Sockets sometimes lockup for 10mins+&quot; class=&quot;issue-link&quot; data-issue-key=&quot;PYTHON-482&quot;&gt;&lt;del&gt;PYTHON-482&lt;/del&gt;&lt;/a&gt; as well.  &lt;/p&gt;

&lt;p&gt;Can you provide any sort of script to reproduce this?  I also notice that you are running server version 2.2.3 - the most recent build of 2.2.x is 2.2.3, and we recommend upgrading and seeing if the issue (as well as &lt;a href=&quot;https://jira.mongodb.org/browse/PYTHON-482&quot; title=&quot;Sockets sometimes lockup for 10mins+&quot; class=&quot;issue-link&quot; data-issue-key=&quot;PYTHON-482&quot;&gt;&lt;del&gt;PYTHON-482&lt;/del&gt;&lt;/a&gt;) persists.&lt;/p&gt;</comment>
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