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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-35452] Build testing infrastructure to default to majority writeConcern either for all transaction ops or drops done in the same JS file</title>
                <link>https://jira.mongodb.org/browse/SERVER-35452</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Problem: two-phase drop takes a strong lock asynchronously and can cause transaction operations, which have 0-second lock request times, to fail randomly. Desired behavior: add majority writeConcern to such drop cmds to ensure the second phase finishes before testing proceeds; or the transaction op subsequent to the drop cmd needs majority write concern to achieve the same effect.&lt;/p&gt;

&lt;p&gt;There needs to be some generic testing solution to two-phase drop interfering with transaction operations. It seems unlikely that every test writer will know to add majority writeConcern to drop cmds done in the proximity of transaction operations.&lt;/p&gt;</description>
                <environment></environment>
        <key id="555163">SERVER-35452</key>
            <summary>Build testing infrastructure to default to majority writeConcern either for all transaction ops or drops done in the same JS file</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="13203">Gone away</resolution>
                                        <assignee username="xiangyu.yao@mongodb.com">Xiangyu Yao</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                            <label>nyc</label>
                    </labels>
                <created>Wed, 6 Jun 2018 19:11:43 +0000</created>
                <updated>Fri, 27 Oct 2023 20:43:23 +0000</updated>
                            <resolved>Mon, 28 Jan 2019 20:47:18 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2129813" author="dianna.hohensee" created="Mon, 28 Jan 2019 20:47:00 +0000"  >&lt;p&gt;I think this can be resolved when the replication two-phase drop logic is removed, eliminating the asynchronous X lock acquisition in v4.2 that can deadlock with transactions.&lt;/p&gt;

&lt;p&gt;This ticket was intended to prevent existing and new tests from running into the deadlock that could occur in tests with concurrent transactions and dropCollection commands.&lt;/p&gt;

&lt;p&gt;Looking at the linked BF, the associated failures haven&apos;t reoccurred since June 2018, so maybe the existing and new tests have been stabilized. Actually, looks like a later filed ticket, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35919&quot; title=&quot;Ensure all tests that &amp;quot;use transactions&amp;quot; perform collection drops with w:majority&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35919&quot;&gt;&lt;del&gt;SERVER-35919&lt;/del&gt;&lt;/a&gt;, did this ticket&apos;s work. Closing.&lt;/p&gt;</comment>
                            <comment id="2129564" author="benety.goh" created="Mon, 28 Jan 2019 18:22:41 +0000"  >&lt;p&gt;Starting in 4.1.7 / &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38670&quot; title=&quot;enable KV drop-pending ident support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38670&quot;&gt;&lt;del&gt;SERVER-38670&lt;/del&gt;&lt;/a&gt;, two phase collection drops no longer take strong locks. Is the work described in this ticket still relevant?&lt;/p&gt;</comment>
                            <comment id="1935763" author="max.hirschhorn@10gen.com" created="Mon, 2 Jul 2018 01:27:12 +0000"  >&lt;blockquote&gt;
&lt;p&gt;It isn&apos;t clear to me though how the testing infrastructure could know when the file is necessary as it depends on the test or test suite indicating that transactions are going to be used.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;I had a new thought of how we could get the override file approach to work after &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=judah.schvimer&quot; class=&quot;user-hover&quot; rel=&quot;judah.schvimer&quot;&gt;judah.schvimer&lt;/a&gt; stopped by in the #server-tig Slack channel asking about &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34349&quot; title=&quot;Wait for drop to be majority committed in transaction tests&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34349&quot;&gt;&lt;del&gt;SERVER-34349&lt;/del&gt;&lt;/a&gt; and ways to generalize it. resmoke.py knows whether a JavaScript test is tagged with &quot;uses_transactions&quot;; however, the JavaScript test itself does not because the information is stored as a comment rather than code. If we made resmoke.py inject the tags of a JavaScript test as a new &lt;tt&gt;TestData&lt;/tt&gt; parameter, then we could have override files make programmatic decisions based on those tags. We wouldn&apos;t need to put any logic in the server to use &quot;majority&quot; when test commands are enabled or anything like that, but could instead have the override file do something along the lines of&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;if (jsTest.options().testTags.includes(&quot;uses_transactions&quot;)) {&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;    // We create a copy of &apos;commandObj&apos; to avoid mutating the parameter the caller specified.&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;    commandObj = Object.assign({}, commandObj);&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;    commandObj.writeConcern = Object.assign({}, commandObj.writeConcern);&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;    commandObj.writeConcern.w = &quot;majority&quot;;&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;   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;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="1916983" author="dianna.hohensee" created="Mon, 11 Jun 2018 15:19:02 +0000"  >&lt;p&gt;Another way to fix this might be to just default drop to use majority writeConcern, unless it&apos;s otherwise specified. This could probably be done easily via a temporary check of &lt;/p&gt;

&lt;p&gt;if (enableTestCommands) &lt;/p&gt;
{
    use majority write concern
}

&lt;p&gt;in the drop command. I think the cluster drop cmd might already use majority writeConcern in self-defense.&lt;/p&gt;</comment>
                            <comment id="1912873" author="max.hirschhorn@10gen.com" created="Wed, 6 Jun 2018 19:46:18 +0000"  >&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r4.1.0/jstests/libs/override_methods/set_read_and_write_concerns.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;The &lt;tt&gt;set_read_and_write_concerns.js&lt;/tt&gt; override file&lt;/a&gt; is some prior art that may be a useful reference for this ticket. It isn&apos;t clear to me though how the testing infrastructure could know when the file is necessary as it depends on the test or test suite indicating that transactions are going to be used.&lt;/p&gt;</comment>
                    </comments>
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                                        <issuelink>
            <issuekey id="565790">SERVER-35919</issuekey>
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            <issuekey id="655909">SERVER-38670</issuekey>
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