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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-6230] intermittent connection refused errors in app opening new connections</title>
                <link>https://jira.mongodb.org/browse/SERVER-6230</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I am seeing intermittent connection refused errors from the MMS agent when running locally against 2.1.2.&lt;/p&gt;

&lt;p&gt;This was in the mongo logs at the time of the failure:&lt;/p&gt;

&lt;p&gt;Wed Jun 27 20:57:32 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn271&amp;#93;&lt;/span&gt; end connection 192.168.0.59:53259 (44 connections now open)&lt;br/&gt;
Wed Jun 27 20:58:10 &lt;span class=&quot;error&quot;&gt;&amp;#91;journal&amp;#93;&lt;/span&gt; info journal _rotate called inside dbMutex - ok but should be somewhat rare&lt;br/&gt;
&lt;b&gt;Wed Jun 27 20:58:28 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn34&amp;#93;&lt;/span&gt; info DFM::findAll(): extent 0:5000 was empty, skipping ahead. ns:alerts.tmp.alertJobs&lt;/b&gt;&lt;br/&gt;
Wed Jun 27 20:58:30 &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; connection accepted from 192.168.0.59:53639 #272 (45 connections now open)&lt;br/&gt;
Wed Jun 27 20:58:30 &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; connection accepted from 192.168.0.59:53640 #273 (46 connections now open)&lt;br/&gt;
Wed Jun 27 20:58:33 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn272&amp;#93;&lt;/span&gt; end connection 192.168.0.59:53639 (45 connections now open)&lt;br/&gt;
Wed Jun 27 20:58:33 &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; connection accepted from 192.168.0.59:53645 #274 (46 connections now open)&lt;br/&gt;
Wed Jun 27 20:58:37 &lt;span class=&quot;error&quot;&gt;&amp;#91;journal&amp;#93;&lt;/span&gt; info journal _rotate called inside dbMutex - ok but should be somewhat rare&lt;/p&gt;

&lt;p&gt;An app exception example (same error when ran with pymongo 2.2):&lt;/p&gt;

&lt;p&gt;     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt; 2012-06-27 20:58:28,863 WARNING Problem collecting non-blocking data from (check if it is up and DNS): some.local:27017 - Traceback (most recent call last):&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;   File &quot;/Users/who/work/dev/mms/server/build/agent-test/nonBlockingStats.py&quot;, line 51, in run&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;     self.monitorConn = self.mmsAgent.getDbConnection( self.hostDef )&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;   File &quot;/Users/who/work/dev/mms/server/build/agent-test/mmsAgent.py&quot;, line 85, in getDbConnection&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;     return pymongo.Connection( hostDef&lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;#39;mongoUri&amp;#39;&amp;#93;&lt;/span&gt; , slave_okay=True )&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;   File &quot;/Library/Python/2.7/site-packages/pymongo-2.1.1-py2.7-macosx-10.7-intel.egg/pymongo/connection.py&quot;, line 381, in _&lt;em&gt;init&lt;/em&gt;_&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;     self.__find_node()&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;   File &quot;/Library/Python/2.7/site-packages/pymongo-2.1.1-py2.7-macosx-10.7-intel.egg/pymongo/connection.py&quot;, line 659, in __find_node&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt;     raise AutoReconnect(&apos;, &apos;.join(errors))&lt;br/&gt;
     &lt;span class=&quot;error&quot;&gt;&amp;#91;exec&amp;#93;&lt;/span&gt; AutoReconnect: could not connect to Rnz4c.local:27017: &lt;span class=&quot;error&quot;&gt;&amp;#91;Errno 61&amp;#93;&lt;/span&gt; Connection refused&lt;/p&gt;</description>
                <environment>Darwin Rnz4c.local 11.4.0 Darwin Kernel Version 11.4.0: Mon Apr  9 19:32:15 PDT 2012; root:xnu-1699.26.8~1/RELEASE_X86_64 x86_64 i386</environment>
        <key id="42642">SERVER-6230</key>
            <summary>intermittent connection refused errors in app opening new connections</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="rn@deftlabs.com">Ryan Nitz</assignee>
                                    <reporter username="rn@deftlabs.com">Ryan Nitz</reporter>
                        <labels>
                    </labels>
                <created>Thu, 28 Jun 2012 01:59:34 +0000</created>
                <updated>Tue, 24 Jul 2012 18:34:20 +0000</updated>
                            <resolved>Thu, 5 Jul 2012 15:25:34 +0000</resolved>
                                    <version>2.1.2</version>
                                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="139891" author="rgnitz" created="Thu, 5 Jul 2012 15:25:34 +0000"  >&lt;p&gt;This appears to be a problem hitting some max/limit for the user on OS X. Despite the setting being high, something else is happening locally. I can still open new connections to mongo via the shell, but something funny happens with DNS resolution.&lt;/p&gt;</comment>
                            <comment id="139012" author="rgnitz" created="Tue, 3 Jul 2012 13:42:28 +0000"  >&lt;p&gt;I am having trouble recreating this in a standalone script. I have enabled verbose logging in the db and will post my findings.&lt;/p&gt;</comment>
                            <comment id="138720" author="dan@10gen.com" created="Mon, 2 Jul 2012 19:02:50 +0000"  >&lt;p&gt;@ryan, can you please provide any other details on how to repro and your setup?&lt;/p&gt;</comment>
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