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    <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-31090] Crash during collection compaction can drop indexes it intended to recreate.</title>
                <link>https://jira.mongodb.org/browse/SERVER-31090</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The index drop is performed in a separate WriteUnitOfWork than their recreation on the catalog (part of `MultiIndexBlock::init`):&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/5767ee2421fa6c7934a90e9083f07743a83dcf71/src/mongo/db/catalog/collection_compact.cpp#L179-L188&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/5767ee2421fa6c7934a90e9083f07743a83dcf71/src/mongo/db/catalog/collection_compact.cpp#L179-L188&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Note how repairDatabase&apos;s index rebuild avoids this problem: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5767ee2421fa6c7934a90e9083f07743a83dcf71/src/mongo/db/repair_database.cpp#L146-L150&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/5767ee2421fa6c7934a90e9083f07743a83dcf71/src/mongo/db/repair_database.cpp#L146-L150&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;It may be reasonable to have compact re-use the repairDatabase code for this.&lt;/p&gt;</description>
                <environment></environment>
        <key id="427515">SERVER-31090</key>
            <summary>Crash during collection compaction can drop indexes it intended to recreate.</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="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Thu, 14 Sep 2017 15:51:16 +0000</created>
                <updated>Tue, 6 Dec 2022 03:51:56 +0000</updated>
                            <resolved>Fri, 14 Sep 2018 19:35:39 +0000</resolved>
                                                                    <component>MMAPv1</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1675248" author="daniel.gottlieb@10gen.com" created="Mon, 18 Sep 2017 13:16:40 +0000"  >&lt;p&gt;Hah! So we do. Nonetheless from what I can tell, `repairDatabase` is not prone to the same error. It would be beneficial to remove that scenario (by fixing having the logic mimic that of `repairDatabase` or removing the index rebuild component).&lt;/p&gt;</comment>
                            <comment id="1673870" author="milkie" created="Fri, 15 Sep 2017 14:20:33 +0000"  >&lt;p&gt;We can remove the index dropping from compact for doc-locking storage engines to fix this.  &lt;/p&gt;</comment>
                            <comment id="1673313" author="asya" created="Thu, 14 Sep 2017 20:54:04 +0000"  >&lt;p&gt;We actually call that out in the docs:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://docs.mongodb.com/manual/reference/command/compact/index.html#operation-termination&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/reference/command/compact/index.html#operation-termination&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&quot;You may have to manually rebuild the indexes.&quot;&lt;/p&gt;</comment>
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