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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-46682] Reuse debugger process for processes of same type in hang_analyzer.py</title>
                <link>https://jira.mongodb.org/browse/SERVER-46682</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Reloading the symbols for every process is another bottleneck. To alleviate this, hang_analyzer.py will be modified to reuse the same debugger process and analyze all processes of the same type (ex. All mongod processes will be analyzed in the same debugger process). &lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Processes will be grouped by process type (Ex. all mongod processes)&lt;/li&gt;
	&lt;li&gt;A single process will be created that will:&lt;/li&gt;
&lt;/ul&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;    run debugger&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;    load symbols&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;    &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;for&lt;/span&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; process in processes:&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;        attach process&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;        dump info&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;The debugger scripts are all hardcoded strings, the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c553f6acd0ce7768d25a2dcdfa9358aa22b5ee55/buildscripts/hang_analyzer.py#L363-L385&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;script for GDB&lt;/a&gt; is especially ugly. GDB has an &lt;a href=&quot;https://sourceware.org/gdb/onlinedocs/gdb/Python-API.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;API for python&lt;/a&gt;, so if this change turns out to be non-trivial to hardcode as plaintext, we can consider rewriting it to use the python API.&lt;/p&gt;

&lt;p&gt;As part of this ticket, ensure the performance improves.&lt;/p&gt;

</description>
                <environment></environment>
        <key id="1241013">SERVER-46682</key>
            <summary>Reuse debugger process for processes of same type in hang_analyzer.py</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="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="13201">Fixed</resolution>
                                        <assignee username="vlad.rachev@mongodb.com">Vlad Rachev</assignee>
                                    <reporter username="vlad.rachev@mongodb.com">Vlad Rachev</reporter>
                        <labels>
                            <label>tig-hanganalyzer</label>
                    </labels>
                <created>Fri, 6 Mar 2020 19:24:02 +0000</created>
                <updated>Sun, 29 Oct 2023 22:11:09 +0000</updated>
                            <resolved>Tue, 2 Jun 2020 14:48:35 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3190109" author="vlad.rachev" created="Thu, 4 Jun 2020 15:20:13 +0000"  >&lt;p&gt;commit: &lt;a href=&quot;https://github.com/mongodb/mongo/commit/9fcca8acb9a8995e007b5c4c06e5349a57e274e6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9fcca8acb9a8995e007b5c4c06e5349a57e274e6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2961782" author="vlad.rachev" created="Tue, 10 Mar 2020 19:22:00 +0000"  >&lt;p&gt;Move the gdb/lldb commands out of hang_analyzer.py and into their own python functions, so that engineers can load those functions into gdb/lldb without needing to go through the hang-analyzer.&lt;/p&gt;

&lt;p&gt;As part of this we will add some testing to hang_analyzer.py. One thing we can do is check that when we call dbg.dump_info with some pids, the command sent to the debugger includes those pids. &lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10020">
                    <name>Gantt Dependency</name>
                                                                <inwardlinks description="has to be done after">
                                        <issuelink>
            <issuekey id="1241629">SERVER-46693</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1365974">SERVER-48479</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1372084">SERVER-48590</issuekey>
        </issuelink>
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