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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>[CDRIVER-3637] Running test-libmongoc with --no-fork can crash on Windows with WinSSL</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-3637</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;While working on &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-3535&quot; title=&quot;Reduce Client Time To Recovery On Topology Changes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-3535&quot;&gt;&lt;del&gt;CDRIVER-3535&lt;/del&gt;&lt;/a&gt;, I disabled forking to get more verbose output in evergreen patch builds. That uncovered frequent crashes in Windows 2017 variants.&lt;/p&gt;

&lt;p&gt;The message does not give much information:&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;   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;[2020/04/24 20:22:53.162] .evergreen/run-tests.sh: line 90:  4106 Segmentation fault      ./src/libmongoc/Debug/test-libmongoc.exe $TEST_ARGS --no-fork -d&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;[2020/04/24 20:22:53.170] Begin /retryable_writes/bulk_tracks_new_server, seed 1587759684&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;[2020/04/24 20:22:53.170] Command failed: command encountered problem: error waiting on process &apos;8bfa5265-7946-4619-83a4-9a4905995626&apos;: exit status 139&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;[2020/04/24 20:22:53.170] Task completed - FAILURE.&lt;/span&gt;&lt;/pre&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Observations:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;the crash is inconsistent but frequent (I saw it at least once almost every patch build)&lt;/li&gt;
	&lt;li&gt;this has only crashed on winssl variants&lt;/li&gt;
	&lt;li&gt;the crash does not seem to occur after any one specific test, but generally after 5-7 minutes of execution&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I attempted to obtain a minidump to no avail by following these instructions &lt;a href=&quot;https://docs.microsoft.com/en-us/windows/win32/wer/collecting-user-mode-dumps&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.microsoft.com/en-us/windows/win32/wer/collecting-user-mode-dumps&lt;/a&gt;&lt;br/&gt;
(I can do so locally when running with cmd.exe, but not with the cygwin terminal).&lt;/p&gt;

&lt;p&gt;I managed to print a stack trace by hooking onto the exception with &lt;a href=&quot;https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setunhandledexceptionfilter&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;SetUnhandledExceptionFilter&lt;/a&gt;, which printed this:&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;
		&lt;tbody &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-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;[2020/04/24 20:02:53.742] begin stack trace&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;[2020/04/24 20:02:53.742] Ordinal1001&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;[2020/04/24 20:02:53.744] BaseThreadInitThunk&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;[2020/04/24 20:02:53.744] RtlUserThreadStart&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;[2020/04/24 20:02:53.766] end stack trace&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;After some more digging, I thought issues with our thread primitives on Windows could be the culprit (&lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-3634&quot; title=&quot;Windows thread handles are leaked&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-3634&quot;&gt;&lt;del&gt;CDRIVER-3634&lt;/del&gt;&lt;/a&gt; or &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-3635&quot; title=&quot;Thread creation on Windows should use _beginthreadex&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-3635&quot;&gt;&lt;del&gt;CDRIVER-3635&lt;/del&gt;&lt;/a&gt;), but attempted fixes to those issues did not resolve the crash.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="1329995">CDRIVER-3637</key>
            <summary>Running test-libmongoc with --no-fork can crash on Windows with WinSSL</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="-1">Unassigned</assignee>
                                    <reporter username="kevin.albertson@mongodb.com">Kevin Albertson</reporter>
                        <labels>
                            <label>platform-problems</label>
                    </labels>
                <created>Mon, 27 Apr 2020 14:29:03 +0000</created>
                <updated>Fri, 10 Feb 2023 16:07:12 +0000</updated>
                                                                            <component>tls</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
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