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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-48698] burn_in_tests can exceed time budget and cause task timeout</title>
                <link>https://jira.mongodb.org/browse/SERVER-48698</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In a patch build we observed a task timeout despite everything seemingly completing successfully. In the task logs we can see first that burn_in_tests decides to run the test one more time:&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;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;   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;[2020/06/10 03:51:27.320] [executor:multi_stmt_txn_passthrough:job0] 2020-06-10T03:51:27.320+0000 Requeueing test jstests/core/command_let_variables.js 60 of (2/1000/600.00 min/max/time), cumulative time elapsed 588.15 &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;You can see the previous run took only ~2 seconds (588 - 586):&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;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;   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;[2020/06/10 03:51:25.222] [executor:multi_stmt_txn_passthrough:job0] 2020-06-10T03:51:25.222+0000 Requeueing test jstests/core/command_let_variables.js 59 of (2/1000/600.00 min/max/time), cumulative time elapsed 586.06 &lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;Then the latest run hits &quot;CleanEveryN&quot; and decides to restart the cluster. This unfortunately takes a very long time:&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;[2020/06/10 03:55:12.948] [executor:multi_stmt_txn_passthrough:job0] 2020-06-10T03:55:12.948+0000 command_let_variables:CleanEveryN ran in 223.59 seconds: no failures detected.&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; [2020/06/10 03:55:12.952] [executor:multi_stmt_txn_passthrough:job0] 2020-06-10T03:55:12.952+0000 Running job0_fixture_teardown...&lt;/span&gt;&lt;/pre&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; [2020/06/10 03:55:12.990] [executor:multi_stmt_txn_passthrough:job0] 2020-06-10T03:55:12.989+0000 Writing output of job0_fixture_teardown to https://logkeeper.mongodb.org/build/d317c125e63d30f0f698745c7d9acd82/test/5ee059a154f2480b9575c692.&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; [2020/06/10 03:56:31.414] Command stopped early: context canceled &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;I believe that last line is where evergreen decided it was a timeout and runs the hang analyzer. CleanEveryN ran in 223.59 seconds or approximately 4 minutes, which brings it to approximately 3.5 minutes over the budget of 600s that burn_in_tests allocated. The task timeout appears to be 17 minutes, so I suspect that we need to either increase the task timeout or have burn_in_tests abort the last iteration of the test if it exceeds the time budget.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1377256">SERVER-48698</key>
            <summary>burn_in_tests can exceed time budget and cause task timeout</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-dag">[DO NOT ASSIGN] Backlog - Decision Automation Group (DAG)</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                    </labels>
                <created>Wed, 10 Jun 2020 18:03:10 +0000</created>
                <updated>Tue, 6 Dec 2022 02:24:36 +0000</updated>
                            <resolved>Mon, 29 Mar 2021 20:42:42 +0000</resolved>
                                                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="3689981" author="david.bradford" created="Mon, 29 Mar 2021 20:42:16 +0000"  >&lt;p&gt;I believe we ended up fixing this in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53058&quot; title=&quot;Better account of CleanEveryN runtime when setting dynamic timeouts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53058&quot;&gt;&lt;del&gt;SERVER-53058&lt;/del&gt;&lt;/a&gt;. If anyone is still seeing this issue in patch builds, please reopen this ticket.&lt;/p&gt;</comment>
                            <comment id="3215051" author="vlad.rachev" created="Thu, 18 Jun 2020 20:17:35 +0000"  >&lt;p&gt;I ran into a burn_in_test timeout as well. &lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_62_64_bit_dynamic_required_burn_in:unittest_shell_hang_analyzer_0_enterprise_rhel_62_64_bit_dynamic_required_patch_59235bae1cbfa1ebdd2b2a12857e4f160a9afe70_5eeb8042d1fe0727a3879544_20_06_18_14_55_14/0##comparehashes=59235bae1cbfa1ebdd2b2a12857e4f160a9afe70&amp;amp;threads=maxonly&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Patch build&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Looking at the task logs it appears that the timeout begins ~3 minutes after &lt;tt&gt;job0_fixture_teardown&lt;/tt&gt; begins. Teardown finishes successfully shortly after. In another build variant in the same patch build the burn_in_tests succeed without timing out, I suspect due to to teardown finishing slightly faster, before the timeout would be hit.&lt;/p&gt;

&lt;p&gt;Is there a way for burn_in_test generation to consider the execution time of teardown tasks when deciding how many tasks to schedule? If not, I think a bigger buffer should be given after tests complete before timing out to allow teardown to finish.&#160;&lt;/p&gt;</comment>
                            <comment id="3204878" author="david.bradford" created="Thu, 11 Jun 2020 12:56:42 +0000"  >&lt;p&gt;Looking at the logs for this execution, CleanEveryN is setting n to 20, which means it will run every 20th test execution. It gets executed 3 times and each time it runs for over 200 seconds (over 3 minutes).  Which means we are spending a lot of time on CleanEveryN. We should probably investigate if there are better ways of handling it.&lt;/p&gt;</comment>
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