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    <title>MongoDB Jira</title>
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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-67924] 4.2 secondary crashes on fassert when replicating a deprecated collMod command option originating from a 4.0 primary</title>
                <link>https://jira.mongodb.org/browse/SERVER-67924</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During the upgrade path from 4.0 to 4.2, applications that use&#160;the 4.0 accepted command&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;   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;db.getSiblingDB(&quot;test&quot;).runCommand({ collMod: &quot;test_col&quot;, usePowerOf2Sizes: true });&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;will crash any 4.2 secondaries that attempt to replicate this command. &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;2022-07-08T12:34:52.641-0400 E  REPL     [repl-writer-worker-0] Failed command { collMod: &quot;test_col&quot;, usePowerOf2Sizes: true } on test with status InvalidOptions: unknown option to collMod: usePowerOf2Sizes during oplog application&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;2022-07-08T12:34:52.660-0400 F  REPL     [repl-writer-worker-0] Error applying operation ({ op: &quot;c&quot;, ns: &quot;test.$cmd&quot;, ui: UUID(&quot;9cdb54d2-a0a7-4f68-9d94-ac0e6622b191&quot;), o: { collMod: &quot;test_col&quot;, usePowerOf2Sizes: true }, o2: { collectionOptions_old: { uuid: UUID(&quot;9cdb54d2-a0a7-4f68-9d94-ac0e6622b191&quot;), flags: 1 } }, ts: Timestamp(1657298092, 1), t: 1, h: -8911072701486057981, v: 2, wall: new Date(1657298092618) }):  :: caused by :: InvalidOptions: unknown option to collMod: usePowerOf2Sizes&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2022-07-08T12:34:52.660-0400 F  REPL     [rsSync-0] Failed to apply batch of operations. Number of operations in batch: 1. First operation: { op: &quot;c&quot;, ns: &quot;test.$cmd&quot;, ui: UUID(&quot;9cdb54d2-a0a7-4f68-9d94-ac0e6622b191&quot;), o: { collMod: &quot;test_col&quot;, usePowerOf2Sizes: true }, o2: { collectionOptions_old: { uuid: UUID(&quot;9cdb54d2-a0a7-4f68-9d94-ac0e6622b191&quot;), flags: 1 } }, ts: Timestamp(1657298092, 1), t: 1, h: -8911072701486057981, v: 2, wall: new Date(1657298092618) }. Last operation: { op: &quot;c&quot;, ns: &quot;test.$cmd&quot;, ui: UUID(&quot;9cdb54d2-a0a7-4f68-9d94-ac0e6622b191&quot;), o: { collMod: &quot;test_col&quot;, usePowerOf2Sizes: true }, o2: { collectionOptions_old: { uuid: UUID(&quot;9cdb54d2-a0a7-4f68-9d94-ac0e6622b191&quot;), flags: 1 } }, ts: Timestamp(1657298092, 1), t: 1, h: -8911072701486057981, v: 2, wall: new Date(1657298092618) }. Oplog application failed in writer thread 4: InvalidOptions: unknown option to collMod: usePowerOf2Sizes&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;2022-07-08T12:34:52.660-0400 F  -        [rsSync-0] Fatal assertion 34437 InvalidOptions: unknown option to collMod: usePowerOf2Sizes at src/mongo/db/repl/sync_tail.cpp 851&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;2022-07-08T12:34:52.660-0400 F  -        [rsSync-0] \n\n***aborting after fassert() failure\n\n&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;This can lead to an undesirable upgrade experience that can cause 4.2 secondary nodes to suddenly crash while following the upgrade procedure.&lt;/p&gt;

&lt;p&gt;MongoDB should be able to handle this failed batch replication better either by ignoring it and/or logging that this collMod option is no longer supported.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2086097">SERVER-67924</key>
            <summary>4.2 secondary crashes on fassert when replicating a deprecated collMod command option originating from a 4.0 primary</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="edwin.zhou@mongodb.com">Edwin Zhou</assignee>
                                    <reporter username="edwin.zhou@mongodb.com">Edwin Zhou</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Jul 2022 21:00:24 +0000</created>
                <updated>Tue, 12 Jul 2022 18:10:25 +0000</updated>
                            <resolved>Tue, 12 Jul 2022 18:10:25 +0000</resolved>
                                    <version>4.2.21</version>
                                                                        <votes>1</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="4674472" author="JIRAUSER1257066" created="Tue, 12 Jul 2022 18:10:25 +0000"  >&lt;p&gt;As 4.0 is already EOL, and any solution will be non-trivial since it will require significant changes to the way we apply collMod operations on 4.2, we are closing this ticket as &quot;Won&apos;t Fix&quot;. &lt;/p&gt;

&lt;p&gt;Users can recover from this by removing any invocations of collMod commands on 4.0 nodes which use MMAPv1 options that were deprecated since 3.0, waiting a bit, and then retrying the upgrade.&lt;/p&gt;

&lt;p&gt;We will be updating our documentation to warn users about deprecated collMod options which can be tracked in &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15477&quot; title=&quot;[SERVER] During the upgrade path from 4.0 to 4.2, warn about legacy collMod options crashing secondary during rolling upgrade&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15477&quot;&gt;&lt;del&gt;DOCS-15477&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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                            <customfieldvalue>&lt;p&gt;This issue can be reproduced by running&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;db.getSiblingDB(&quot;test&quot;).getCollection(&quot;test_col&quot;).insert({a:1})&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;   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;db.getSiblingDB(&quot;test&quot;).runCommand({ collMod: &quot;test_col&quot;, usePowerOf2Sizes: true });&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;on a 4.0 primary with one 4.2 secondary.&lt;/p&gt;</customfieldvalue>

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