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<channel>
    <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-48909] Fix a bug where a sharded backup/restore test loses a record</title>
                <link>https://jira.mongodb.org/browse/SERVER-48909</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The MongoDB test suite has seen a failure where a sharded backup restore test doesn&apos;t see the expected set of records at the end of the test. The test is being run with majority read concern off.&lt;/p&gt;

&lt;p&gt;The test case is:&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;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;src/mongo/db/modules/enterprise/jstests/hot_backups/sharded_last_stable_pit_backup_restore_simple.js&lt;/span&gt;&lt;/pre&gt;
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			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Stacktrace:&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;assert@src/mongo/shell/assert.js:151:9&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;_verifyDataIsCausallyConsistent@src/mongo/db/modules/enterprise/jstests/hot_backups/libs/sharded_backup_restore.js:159:13&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;_checkDataConsistency@src/mongo/db/modules/enterprise/jstests/hot_backups/libs/sharded_backup_restore.js:217:27&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;ShardedBackupRestoreTest/this.run@src/mongo/db/modules/enterprise/jstests/hot_backups/libs/sharded_backup_restore.js:960:9&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;@src/mongo/db/modules/enterprise/jstests/hot_backups/sharded_last_stable_pit_backup_restore_simple.js:24:11&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;@src/mongo/db/modules/enterprise/jstests/hot_backups/sharded_last_stable_pit_backup_restore_simple.js:10:2&lt;/span&gt;&lt;/pre&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Logs:&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;assert failed : Doc 100 is missing&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
</description>
                <environment></environment>
        <key id="1379026">SERVER-48909</key>
            <summary>Fix a bug where a sharded backup/restore test loses a record</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="13203">Gone away</resolution>
                                        <assignee username="lamont.nelson@mongodb.com">Lamont Nelson</assignee>
                                    <reporter username="alexander.gorrod@mongodb.com">Alexander Gorrod</reporter>
                        <labels>
                            <label>sharding-nyc-subteam2</label>
                    </labels>
                <created>Thu, 11 Jun 2020 23:25:44 +0000</created>
                <updated>Tue, 28 Nov 2023 20:28:36 +0000</updated>
                            <resolved>Tue, 28 Nov 2023 20:28:35 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="5910388" author="lamont.nelson" created="Tue, 28 Nov 2023 20:28:36 +0000"  >&lt;p&gt;The last occurrence of this was in 2021. Closing this issue.&lt;/p&gt;</comment>
                            <comment id="4350798" author="JIRAUSER1263882" created="Fri, 11 Feb 2022 16:54:53 +0000"  >&lt;p&gt;After analyzing the logs from &lt;a href=&quot;https://jira.mongodb.org/browse/BFG-939373&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/BFG-939373&lt;/a&gt;&#160;with the last occurrence on Dec 9,2021: and also looking at the archived data files added in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49146&quot; title=&quot;Enable s3 archiving of data files for backup tests in src/mongo/db/modules/enterprise/jstests/hot_backups&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49146&quot;&gt;&lt;del&gt;SERVER-49146&lt;/del&gt;&lt;/a&gt;&#160; - and bringing up a mongod server on shard0 restore file with the restore option of&lt;/p&gt;

&lt;p&gt;--setParameter recoverFromOplogAsStandalone=true&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Shard0 is missing a bunch of document IDs from restore/shard0/-&#160; 100,104,.... 1520 and then the rest are all in the collection.&#160;&lt;/li&gt;
	&lt;li&gt;Shard1 has all the documentIDs expected as far as I can tell&lt;/li&gt;
	&lt;li&gt;The WT message from the recovery mongod log has a timestamp of&#160;1638974263&lt;/li&gt;
&lt;/ol&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;
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font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;2022-02-11T14:58:06.292+00:00&quot;&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;},&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;s&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;I&quot;&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;,&#160; 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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: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;msg&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;Recovering from stable timestamp&quot;&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;,&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;attr&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;stableTimestamp&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;$timestamp&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;t&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1638974263&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;,&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;i&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;4&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;}},&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;topOfOplog&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;ts&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;$timestamp&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;t&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1638974263&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;,&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;i&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;4&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;}},&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;t&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2&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;},&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;appliedThrough&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;ts&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;$timestamp&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;t&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;0&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;,&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;i&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;0&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;}},&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;t&quot;&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;:-&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1&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;},&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;oplogTruncateAfterPoint&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;$timestamp&quot;&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;:{&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;t&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;0&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;,&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;i&quot;&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;:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;0&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;}}}}&lt;/span&gt;&lt;/pre&gt;
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					&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;&#160;&lt;/span&gt;&lt;/pre&gt;
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&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;&#160; &#160; &#160;4. The document 100 insert timestamp from the BF log : -&#160;{&quot;$timestamp&quot;:{&quot;t&quot;:1638974152,&quot;i&quot;:125}}&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="4188959" author="kaloian.manassiev" created="Mon, 15 Nov 2021 15:19:05 +0000"  >&lt;p&gt;Putting this ticket in Needs Triage and on the NYC&apos;s backlog since it is not related to the catalog.&lt;/p&gt;</comment>
                            <comment id="3276230" author="lamont.nelson" created="Wed, 8 Jul 2020 22:13:44 +0000"  >&lt;p&gt;Since &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49146&quot; title=&quot;Enable s3 archiving of data files for backup tests in src/mongo/db/modules/enterprise/jstests/hot_backups&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49146&quot;&gt;&lt;del&gt;SERVER-49146&lt;/del&gt;&lt;/a&gt; was committed, I think we need to see what was actually persisted in a future run to determine what we need to fix.&lt;/p&gt;</comment>
                            <comment id="3276223" author="lamont.nelson" created="Wed, 8 Jul 2020 22:09:48 +0000"  >&lt;p&gt;Yes, in the originating BF for this ticket the restore point was also after the backup point. I didn&apos;t see evidence in the log for the timestamp of document 100, but the restore point was after the timestamp for document 101. I&apos;m unable repro this locally, and the logs do not indicate whether this is a problem in writing the data or reading from the backup.&lt;/p&gt;</comment>
                            <comment id="3214328" author="daniel.gottlieb@10gen.com" created="Thu, 18 Jun 2020 15:31:56 +0000"  >&lt;p&gt;Perhaps the same root cause as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48934&quot; title=&quot;Investigate replica set data mismatch from Jepsen testing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48934&quot;&gt;&lt;del&gt;SERVER-48934&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3212441" author="judah.schvimer" created="Wed, 17 Jun 2020 15:45:03 +0000"  >&lt;blockquote&gt;
&lt;p&gt;How do you distinguish between a causal write and a non-causal write? Or is what you are saying that the only way to do that is to know how the session is setup?&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;I&apos;m currently just looking at the session ids and assuming they&apos;re causal or not based on what the test does. &lt;tt&gt;3c3a7373-4def-4c02-8099-143f5f3d161&lt;/tt&gt; seems to be the first session, so I&apos;m assuming that&apos;s the non-causal one. We also see this line:&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;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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:34:11.754+0000 [jsTest] New session started with sessionID: {  &quot;id&quot; : UUID(&quot;3c3a7373-4def-4c02-8099-143f5f3d1618&quot;) } and options: {  &quot;causalConsistency&quot; : false }&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;&lt;tt&gt;6036b3f8-307e-412f-8106-5aea0828bd45&lt;/tt&gt; comes next, so I think that&apos;s the causal one, but we never see it get started, likely due to some details in how the test infrastructure works involving the second shell we start.&lt;/p&gt;

&lt;p&gt;If we saw &lt;tt&gt;afterClusterTime&lt;/tt&gt; arguments we&apos;d know causal consistency was enabled. I don&apos;t think we log that though for inserts here (since we don&apos;t log the entire command in slow operation logs), so I think we don&apos;t really know. I would guess causal consistency is enabled though, and that it&apos;s not sufficient for the test due to some other test bug, or that there is a server bug, which would be very concerning. If I were to choose a non-storage team, I&apos;d start with sharding.&lt;/p&gt;</comment>
                            <comment id="3211518" author="sue.loverso" created="Tue, 16 Jun 2020 23:49:01 +0000"  >&lt;p&gt;If this is a backup test issue the first thing (or maybe it is already done) would be for the test to keep a copy of the backup that we restart from. I thought the tests already did that into some kind of shadow directory but I might be remembering wrong. Determining whether backup and logs are the issue should be able to be determined with that directory.&lt;/p&gt;</comment>
                            <comment id="3211495" author="daniel.gottlieb@10gen.com" created="Tue, 16 Jun 2020 23:20:10 +0000"  >&lt;p&gt;The test uses causal because it&apos;s for sharding. E.g: the opTime for insert #90 must be less than #91 even though they&apos;ll end up on different shards. Write #100 is special because that&apos;s the first write after forcing a checkpoint with the &lt;tt&gt;fsync&lt;/tt&gt; command. Opening up a backup cursor after that point will likely contain writes 0-99 in the checkpoints (spread across the shards) and writes 100+ will be part of the journal that&apos;s copied.&lt;/p&gt;

&lt;p&gt;Given there&apos;s been challenges getting WT to replay the log from backup data, I&apos;d first rule that out. I tried figuring out which of these tickets has a patch should have stuck, but I&apos;m struggling to untangle things. They&apos;re all closed as duplicates of each other and the two with commits, have a corresponding revert: &lt;a href=&quot;https://jira.mongodb.org/browse/WT-6015&quot; title=&quot;(4.4-only) Backup test appears to be missing oplog entries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-6015&quot;&gt;&lt;del&gt;WT-6015&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/WT-6324&quot; title=&quot;Need logging to be configured when checking compatibility&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-6324&quot;&gt;&lt;del&gt;WT-6324&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/WT-6327&quot; title=&quot;Skip level upgrade.js still failing after applying WT-6324&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-6327&quot;&gt;&lt;del&gt;WT-6327&lt;/del&gt;&lt;/a&gt;. Assuming a fix did actually land on 4.4 for the BF run, I&apos;d look to see that WT replayed log files on startup and that one of the shard&apos;s data files contains write #100 in the oplog.&lt;/p&gt;

&lt;p&gt;That said, this could very well be a MongoDB bug. What I just described is how I triage whether this is something for WT or SERVER to look at.&lt;/p&gt;</comment>
                            <comment id="3211469" author="alexander.gorrod" created="Tue, 16 Jun 2020 22:58:57 +0000"  >&lt;p&gt;Thanks &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; - could you help find the right backlog to move this to for initial analysis? I&apos;ve moved it to a SERVER ticket to make that more obvious. Even if this ends up being a WiredTiger bug, I think we&apos;ll need help in characterizing what the test is expecting and where it&apos;s going wrong.&lt;/p&gt;</comment>
                            <comment id="3210302" author="judah.schvimer" created="Tue, 16 Jun 2020 17:20:22 +0000"  >&lt;p&gt;This is definitely worth digging deeper into. It certainly could make sense though for someone on repl/sharding/execution to look first for a test bug.&lt;/p&gt;</comment>
                            <comment id="3209317" author="alexander.gorrod" created="Tue, 16 Jun 2020 03:06:25 +0000"  >&lt;p&gt;&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; you recently made a change to the test referenced here in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47024&quot; title=&quot;Ensure there is a &amp;quot;lastDocID&amp;quot; in sharded_backup_restore.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47024&quot;&gt;&lt;del&gt;SERVER-47024&lt;/del&gt;&lt;/a&gt;, so I&apos;m reaching out to you. Please push back if you aren&apos;t the right person.&lt;/p&gt;

&lt;p&gt;The failure being reported &lt;tt&gt;assert failed : Doc 100 is missing&lt;/tt&gt; seems interesting to me. The test log shows that there are a &lt;b&gt;lot&lt;/b&gt; more documents than that &lt;tt&gt;There are 22170 documents in total.&lt;/tt&gt; which makes me wonder why that specific document.&lt;/p&gt;

&lt;p&gt;The question that I have explicitly is that the failure is coming from a function called &lt;tt&gt;_verifyDataIsCausallyConsistent&lt;/tt&gt;, when the test output is sprinkled very liberally with {{options: {  &quot;causalConsistency&quot; : false }}}. For example:&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;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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.830+0000 &lt;/span&gt;&lt;/pre&gt;
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					&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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.830+0000 [jsTest] ----&lt;/span&gt;&lt;/pre&gt;
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					&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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.830+0000 [jsTest] Verifying data is causally consistent&lt;/span&gt;&lt;/pre&gt;
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					&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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.830+0000 [jsTest] ----&lt;/span&gt;&lt;/pre&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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.830+0000 &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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.830+0000 &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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.830+0000 &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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.831+0000 [jsTest] ----&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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.831+0000 [jsTest] New session started with sessionID: {  &quot;id&quot; : UUID(&quot;dca2c93f-4e3f-41e4-a96f-fbdaca2c517d&quot;) } and options: {  &quot;causalConsistency&quot; : false }&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;[js_test:sharded_last_stable_pit_backup_restore_simple] 2020-06-10T18:38:33.831+0000 [jsTest] ----&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 are more familiar with the test than me. Do you think it&apos;s likely that this is a test problem, or is it something worth digging deeper into? We&apos;ve seen the failure exactly once, so I don&apos;t have much signal about when the problem was introduced.&lt;/p&gt;</comment>
                            <comment id="3207299" author="alexander.gorrod" created="Sun, 14 Jun 2020 23:38:53 +0000"  >&lt;p&gt;I kicked off relevant testing on a number of intermediate jobs, to see if we can get more information about when this started and how often it occurs:&lt;br/&gt;
&lt;a href=&quot;https://evergreen.mongodb.com/waterfall/mongodb-mongo-v4.4?bv_filter=major&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/waterfall/mongodb-mongo-v4.4?bv_filter=major&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3206297" author="alexander.gorrod" created="Thu, 11 Jun 2020 23:27:32 +0000"  >&lt;p&gt;The first step here is understanding the test case, and the failure. We should check to see if any changes we&apos;ve made since the failure happened could explain the symptom (especially those around recovery and rollback to stable).&lt;/p&gt;

&lt;p&gt;It&apos;s possible that the failure isn&apos;t due to a bug in WiredTiger - but unlikely, since WiredTiger has been most actively changing how backup and recovery work.&lt;/p&gt;</comment>
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