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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-20182] killCursor command causes fassert failure in mongod with low limit for open files</title>
                <link>https://jira.mongodb.org/browse/SERVER-20182</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;PyMongo is probably doing something wrong, but in replacing OP_KILLCURSOR with the killCursors command, we are causing the database (version 3.1.6) to exit with the 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;
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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;2015-08-28T13:21:46.080-0400 I REPL     [ReplicationExecutor] Error in heartbeat request to mongodb.home:27017; HostUnreachable Failed attempt to connect to mongodb.home:27017; couldn&apos;t initialize connection to host mongodb.home, address is invalid&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;2015-08-28T13:21:46.498-0400 E STORAGE  [repl writer worker 6] WiredTiger (24) [1440782506:498605][5975:0x110c89000], WT_SESSION.create: /Users/annaherlihy/data/mongodb/rs0-2/index-1918-8285583706914688281.wt: Too many open files&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;2015-08-28T13:21:46.499-0400 E REPL     [repl writer worker 6] Failed command { create: &quot;test&quot; } on pymongo_test with status UnknownError 24: Too many open files during oplog application&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;2015-08-28T13:21:46.499-0400 F REPL     [repl writer worker 6] Error applying operation ({ ts: Timestamp 1440782501000|2, h: 2043797443416079560, v: 2, op: &quot;c&quot;, ns: &quot;pymongo_test.$cmd&quot;, o: { create: &quot;test&quot; } }): UnknownError 24: Too many open files&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;2015-08-28T13:21:46.499-0400 I -        [repl writer worker 6] Fatal Assertion 16359&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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;2015-08-28T13:21:46.499-0400 I -        [repl writer worker 6]&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;&amp;nbsp;&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;***aborting after fassert() failure&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="227552">SERVER-20182</key>
            <summary>killCursor command causes fassert failure in mongod with low limit for open files</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="-1">Unassigned</assignee>
                                    <reporter username="anna.herlihy@mongodb.com">Anna Herlihy</reporter>
                        <labels>
                    </labels>
                <created>Fri, 28 Aug 2015 17:26:10 +0000</created>
                <updated>Sun, 20 Mar 2016 13:08:32 +0000</updated>
                            <resolved>Sun, 20 Mar 2016 13:08:31 +0000</resolved>
                                                                    <component>Admin</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1017303" author="adam.midvidy" created="Fri, 28 Aug 2015 19:15:58 +0000"  >&lt;p&gt;Could you try with 3.1.7 using mmapv1 instead of wiredTiger?&lt;/p&gt;</comment>
                            <comment id="1017270" author="rassi@10gen.com" created="Fri, 28 Aug 2015 18:38:34 +0000"  >&lt;p&gt;A couple of questions:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Could you attempt to reproduce with 3.1.7?&lt;/li&gt;
	&lt;li&gt;Is PyMongo opening a new connection for each &quot;kill cursor&quot; operation?  If so, I could imagine a scenario where the driver is opening hundreds of connections for &quot;kill cursor&quot; operations, but the OP_KILL_CURSORS connections are short-lived (since they generate no response) whereas the killCursor command connections are longer-lived (since they generate a response that the driver is presumably waiting to consume).  I could see this making it more likely in the latter case to reach a point where &amp;gt;256 connections are open concurrently.&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="1017221" author="ramon.fernandez" created="Fri, 28 Aug 2015 17:49:23 +0000"  >&lt;p&gt;Hey &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=anna.herlihy%4010gen.com&quot; class=&quot;user-hover&quot; rel=&quot;anna.herlihy@10gen.com&quot;&gt;anna.herlihy@10gen.com&lt;/a&gt;, do you have a small repro we can use?&lt;/p&gt;

&lt;p&gt;Also the error message is complaining about &lt;tt&gt;too many open files&lt;/tt&gt;, can you please send the output of &lt;tt&gt;ulimit -a&lt;/tt&gt; on your system?&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
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