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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>
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<item>
            <title>[SERVER-35317] restartCatalog problematically discards minVisibleSnapshot data</title>
                <link>https://jira.mongodb.org/browse/SERVER-35317</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Restarting the catalog destroys in memory catalog objects (Database, Collection, IndexCatalog&lt;span class=&quot;error&quot;&gt;&amp;#91;Entry&amp;#93;&lt;/span&gt;) and reconstructs them based on the state of the storage engine. However, because the catalog is not versioned, this process loses versioning information, in particular the &quot;minimum visible snapshot&quot; value. That value is used to prevent reading the catalog at too early of a time.&lt;/p&gt;

&lt;p&gt;Typically with rollback, those values are get filled in to correct values when replication recovery plays forward from the stable timestamp. However the restart catalog command does not roll back data, and therefore does not perform any replication recovery.&lt;/p&gt;

&lt;p&gt;This case is only problematic in testing, as the restartCatalog command is test-only.&lt;/p&gt;</description>
                <environment></environment>
        <key id="552279">SERVER-35317</key>
            <summary>restartCatalog problematically discards minVisibleSnapshot data</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="13201">Fixed</resolution>
                                        <assignee username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Thu, 31 May 2018 17:04:55 +0000</created>
                <updated>Sun, 29 Oct 2023 22:31:15 +0000</updated>
                            <resolved>Mon, 2 Jul 2018 14:46:42 +0000</resolved>
                                                    <fixVersion>4.0.1</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1937132" author="xgen-internal-githook" created="Mon, 2 Jul 2018 19:48:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;dgottlieb&apos;, &apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35317&quot; title=&quot;restartCatalog problematically discards minVisibleSnapshot data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35317&quot;&gt;&lt;del&gt;SERVER-35317&lt;/del&gt;&lt;/a&gt;: Disallow mmapv1 from running `restartCatalog`.&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/77c1f02a1d15b75e4f38a62dfb85d5a05b1c821c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/77c1f02a1d15b75e4f38a62dfb85d5a05b1c821c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1936680" author="xgen-internal-githook" created="Mon, 2 Jul 2018 15:53:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;dgottlieb&apos;, &apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35317&quot; title=&quot;restartCatalog problematically discards minVisibleSnapshot data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35317&quot;&gt;&lt;del&gt;SERVER-35317&lt;/del&gt;&lt;/a&gt;: Preserve minVisible values when refreshing the catalog.&lt;/p&gt;

&lt;p&gt;Restarting the catalog throws away the &quot;minVisibleSnapshot&quot; info on all&lt;br/&gt;
collections. This is typically safe for rollback, the value is reinstantiated&lt;br/&gt;
when replication recovery rolls forward from the stable timestamp. However, it&apos;s&lt;br/&gt;
possible to read behind the stable timestamp. Currently only test commands can&lt;br/&gt;
do so, but the future may formally expose this case particularly for sharded&lt;br/&gt;
cluster snapshot reads.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit b3a542545c7367f96d57cab5e89dc389748c0e2c)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53a0c9cba92239d3236016a1d1bf486e95ce860c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53a0c9cba92239d3236016a1d1bf486e95ce860c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1936550" author="xgen-internal-githook" created="Mon, 2 Jul 2018 14:46:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;dgottlieb&apos;, &apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35317&quot; title=&quot;restartCatalog problematically discards minVisibleSnapshot data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35317&quot;&gt;&lt;del&gt;SERVER-35317&lt;/del&gt;&lt;/a&gt;: Preserve minVisible values when refreshing the catalog.&lt;/p&gt;

&lt;p&gt;Restarting the catalog throws away the &quot;minVisibleSnapshot&quot; info on all&lt;br/&gt;
collections. This is typically safe for rollback, the value is reinstantiated&lt;br/&gt;
when replication recovery rolls forward from the stable timestamp. However, it&apos;s&lt;br/&gt;
possible to read behind the stable timestamp. Currently only test commands can&lt;br/&gt;
do so, but the future may formally expose this case particularly for sharded&lt;br/&gt;
cluster snapshot reads.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b3a542545c7367f96d57cab5e89dc389748c0e2c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b3a542545c7367f96d57cab5e89dc389748c0e2c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1932906" author="xgen-internal-githook" created="Wed, 27 Jun 2018 16:47:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;dgottlieb&apos;, &apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35317&quot; title=&quot;restartCatalog problematically discards minVisibleSnapshot data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35317&quot;&gt;&lt;del&gt;SERVER-35317&lt;/del&gt;&lt;/a&gt;: Preserve minVisible values when refreshing the catalog.&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit dc849ad01396b513e61ae389b3bce4b28f3404be.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7bac7301b387e843e5672ad50d3ffcfcd807cb03&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7bac7301b387e843e5672ad50d3ffcfcd807cb03&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1932722" author="xgen-internal-githook" created="Wed, 27 Jun 2018 14:04:35 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;dgottlieb&apos;, &apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35317&quot; title=&quot;restartCatalog problematically discards minVisibleSnapshot data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35317&quot;&gt;&lt;del&gt;SERVER-35317&lt;/del&gt;&lt;/a&gt;: Preserve minVisible values when refreshing the catalog.&lt;/p&gt;

&lt;p&gt;Restarting the catalog throws away the &quot;minVisibleSnapshot&quot; info on all&lt;br/&gt;
collections. This is typically safe for rollback, the value is reinstantiated&lt;br/&gt;
when replication recovery rolls forward from the stable timestamp. However, it&apos;s&lt;br/&gt;
possible to read behind the stable timestamp. Currently only test commands can&lt;br/&gt;
do so, but the future may formally expose this case particularly for sharded&lt;br/&gt;
cluster snapshot reads.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dc849ad01396b513e61ae389b3bce4b28f3404be&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dc849ad01396b513e61ae389b3bce4b28f3404be&lt;/a&gt;&lt;/p&gt;</comment>
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