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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-49276] repl_ssl_split_horizon.js test leaves /etc/os-release in a strange state</title>
                <link>https://jira.mongodb.org/browse/SERVER-49276</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Driver tests occasionally fail with this strange error:&lt;/p&gt;
&lt;p/&gt;
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					&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;[2020/07/01 22:03:56.354] + . /data/mci/4ba521569a7cb43abf2e2b408ef3c33f/drivers-tools/.evergreen/download-mongodb.sh&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;[2020/07/01 22:03:56.355] ++ set -o xtrace&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;[2020/07/01 22:03:56.355] ++ set -o errexit&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;[2020/07/01 22:03:56.355] + get_distro&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;[2020/07/01 22:03:56.355] + &apos;[&apos; -f /etc/os-release &apos;]&apos;&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;[2020/07/01 22:03:56.355] + . /etc/os-release&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;[2020/07/01 22:03:56.356] ++ splithorizon1 localhost&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;[2020/07/01 22:03:56.356] /etc/os-release: line 1: splithorizon1: command not found&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;[2020/07/01 22:03:56.356] Enabling coredumps&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;[2020/07/01 22:03:56.356] Command failed: command encountered problem: error waiting on process &apos;14483eb1-688d-48ab-843d-dd26cf81bce0&apos;: exit status 127&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;
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&lt;p/&gt;
&lt;p&gt;Ref: &lt;a href=&quot;https://evergreen.mongodb.com/task/mongo_python_driver_tests_python_version_rhel62_test_ssl__platform~rhel62_auth~noauth_ssl~nossl_python_version~3.6_coverage~coverage_test_latest_sharded_cluster_1f4123e4bf54f9ed689ce77ffb8dfbccc3e688f0_20_07_01_21_49_46&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task/mongo_python_driver_tests_python_version_rhel62_test_ssl__platform~rhel62_auth~noauth_ssl~nossl_python_version~3.6_coverage~coverage_test_latest_sharded_cluster_1f4123e4bf54f9ed689ce77ffb8dfbccc3e688f0_20_07_01_21_49_46&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The following test seems to be the culprit as it edits /etc/os-release and leaves it in a strange state: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f31bc89/jstests/ssl/repl_ssl_split_horizon.js#L6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/f31bc89/jstests/ssl/repl_ssl_split_horizon.js#L6&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;/etc/os-release is supposed to be a &quot;newline-separated list of environment-like shell-compatible variable assignments&quot;. &lt;a href=&quot;https://www.freedesktop.org/software/systemd/man/os-release.html#Description&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.freedesktop.org/software/systemd/man/os-release.html#Description&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1399547">SERVER-49276</key>
            <summary>repl_ssl_split_horizon.js test leaves /etc/os-release in a strange state</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-stm">Backlog - Server Tooling and Methods (STM)</assignee>
                                    <reporter username="shane.harvey@mongodb.com">Shane Harvey</reporter>
                        <labels>
                            <label>dev-prod-qp-idea</label>
                    </labels>
                <created>Thu, 2 Jul 2020 00:31:22 +0000</created>
                <updated>Tue, 6 Dec 2022 02:19:42 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="4539767" author="steven.vannelli" created="Tue, 10 May 2022 21:23:00 +0000"  >&lt;p&gt;Moving this ticket to the Backlog and removing the &quot;Backlog&quot; fixVersion as per our latest policy for using fixVersions. &lt;/p&gt;</comment>
                            <comment id="3324254" author="robert.guo" created="Thu, 6 Aug 2020 12:40:59 +0000"  >&lt;p&gt;Like Billy said, there&apos;s nothing in the Server repo modifies that file. But it&apos;s entirely possible somebody changed it in a rogue patch build. Given the 1:1000 failure rate, I think it&apos;s a plausible explanation. To understand the problem further, we&apos;d need to audit all file access or have Evergreen limit the write permissions of files outside of /data/mci.&lt;/p&gt;

&lt;p&gt;I&apos;m putting it on the backlog for now since there&apos;s not much we can do in the short term. I&apos;ll propose the longer term solution at the next QP.&lt;/p&gt;</comment>
                            <comment id="3297777" author="billy.donahue" created="Wed, 22 Jul 2020 22:29:18 +0000"  >&lt;p&gt;Brian, I believe I&apos;ve already done that audit, and nothing under the mongodb/mongo repo modifies that file.&lt;br/&gt;
There could be programs outside the server repo I wouldn&apos;t know about though, so it is good to get confirmation.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="3297753" author="brian.samek" created="Wed, 22 Jul 2020 22:10:01 +0000"  >&lt;p&gt;Thanks, I should have been clearer. I meant to ask whether the server or any tests manipulate that file. Evergreen does not. It&apos;s conceivable that there&apos;s something up with the host. I think the right teams to look would be STM and then Build.&lt;/p&gt;</comment>
                            <comment id="3297723" author="billy.donahue" created="Wed, 22 Jul 2020 21:48:05 +0000"  >&lt;p&gt;The server does not manipulate /etc/os-release.&lt;/p&gt;

&lt;p&gt;There&apos;s a line in src/mongo/util/processinfo_linux.cpp&apos;s getLinuxDistro() that lists it as one of the files to READ to try to glean linux distro metadata.&lt;/p&gt;

&lt;p&gt;The server wouldn&apos;t normally have permission to change that file.&lt;/p&gt;</comment>
                            <comment id="3297546" author="brian.samek" created="Wed, 22 Jul 2020 20:23:54 +0000"  >&lt;p&gt;I&apos;m going to send to STM, since I&apos;d like to know first if the server manipulates this file. CC &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=robert.guo&quot; class=&quot;user-hover&quot; rel=&quot;robert.guo&quot;&gt;robert.guo&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3286832" author="billy.donahue" created="Wed, 15 Jul 2020 19:23:32 +0000"  >&lt;p&gt;I&apos;m guessing there&apos;s some packing and unpacking script used for setup and teardown that has a bug.&#160;The contents of a file that was created in a unit test under a /data/ dir has somehow ended up becoming contents of a buildhost&apos;s /etc/os-release file, in 1:1000 runs.&lt;br/&gt;
&#160;&lt;br/&gt;
Assigning to Evergreen team for further analysis.&lt;/p&gt;</comment>
                            <comment id="3286454" author="billy.donahue" created="Wed, 15 Jul 2020 16:17:57 +0000"  >&lt;p&gt;I believe the description is incorrect, and the test does not appear to edit /etc/os-release. It only reads from it by shelling out to `cat`.&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/f31bc89/jstests/ssl/repl_ssl_split_horizon.js#L51&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/f31bc89/jstests/ssl/repl_ssl_split_horizon.js#L51&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The highlighted line&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/f31bc89/jstests/ssl/repl_ssl_split_horizon.js#L6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/f31bc89/jstests/ssl/repl_ssl_split_horizon.js#L6&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;generates the name of a mongodb split-horizon-hosts file, which is newline-separated hostnames.&lt;/p&gt;


&lt;p&gt;Trying to figure out how that failure message from the description occurred.&lt;/p&gt;</comment>
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