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    <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-43592] Check that real execution traces are permitted by selected TLA+ specs</title>
                <link>https://jira.mongodb.org/browse/SERVER-43592</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Write a script that determines whether an actual execution trace (extracted from the logs after a replica set test) matches a trace permitted by a given TLA+ spec. The exact technique is TBD; it will involve some interaction between TLC and our custom checking code.&lt;/p&gt;

&lt;p&gt;Questions:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Dump the whole state graph and check the trace with Python (&lt;a href=&quot;https://github.com/ajdavis/repl-trace-checker/blob/c3d5e2900c2b22afae5cfb05e2bcd20c114bcb58/README.md&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Jesse&apos;s Skunkworks script&lt;/a&gt;) or follow&#160;Pressler&apos;s &quot;Verifying Software Traces Against a Formal Specification with TLA+ and TLC&quot;?&lt;/li&gt;
	&lt;li&gt;Use/disable TLC&apos;s &quot;symmetry set&quot; optimization?&lt;/li&gt;
	&lt;li&gt;In addition to checking that we go from one permitted state to another, also check that we get there only by executing &lt;b&gt;actions&lt;/b&gt;&#160;enabled in the spec?&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="938644">SERVER-43592</key>
            <summary>Check that real execution traces are permitted by selected TLA+ specs</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="jesse@mongodb.com">A. Jesse Jiryu Davis</assignee>
                                    <reporter username="jesse@mongodb.com">A. Jesse Jiryu Davis</reporter>
                        <labels>
                    </labels>
                <created>Tue, 24 Sep 2019 16:11:22 +0000</created>
                <updated>Sun, 29 Oct 2023 22:16:51 +0000</updated>
                            <resolved>Mon, 13 Jan 2020 23:17:06 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2724439" author="jesse" created="Tue, 14 Jan 2020 15:13:49 +0000"  >&lt;p&gt;We chose to implement &lt;a href=&quot;https://pron.github.io/files/Trace.pdf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Ron Pressler&apos;s method&lt;/a&gt; of generating a temporary TLA&amp;#43; spec that asserts a particular execution trace is a valid spec behavior, and then model-checking the temporary spec with TLC. I wrote &lt;a href=&quot;https://github.com/mongodb-labs/repl-trace-checker&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;a Python script&lt;/a&gt; that parses and merges logs from a real replica set, generates the temporary spec, and executes TLC.&lt;/p&gt;

&lt;p&gt;The final point, checking that we execute each state transition via the expected &lt;b&gt;action&lt;/b&gt;, is future work.&lt;/p&gt;</comment>
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