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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-34762] Unclean shutdown prevents startup (iOS)</title>
                <link>https://jira.mongodb.org/browse/SERVER-34762</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Received the following error log after terminating an iOS application (signal 9):&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;&lt;b&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;storage&amp;#93;&lt;/span&gt; Detected unclean shutdown - /Users/jasonflax/Library/Developer/CoreSimulator/Devices/A8328A47-7C7E-4CB7-A96A-A0DC3D50AFA1/data/Containers/Data/Application/E51E8B25-71B5-4862-833A-CB98B45B0082/mongod.lock is not empty.&lt;/b&gt;&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;It appears that `MongoMobile.close()` was not called as `deinit` is not called when an application is terminated.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;This was replicated on an iOS simulator.&lt;/p&gt;</description>
                <environment></environment>
        <key id="536798">SERVER-34762</key>
            <summary>Unclean shutdown prevents startup (iOS)</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="henrik.edin@mongodb.com">Henrik Edin</assignee>
                                    <reporter username="jason.flax@mongodb.com">Jason Flax</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Mon, 30 Apr 2018 22:59:52 +0000</created>
                <updated>Sun, 29 Oct 2023 22:32:13 +0000</updated>
                            <resolved>Wed, 13 Jun 2018 20:54:31 +0000</resolved>
                                                    <fixVersion>4.0.0-rc6</fixVersion>
                    <fixVersion>4.1.1</fixVersion>
                                    <component>Build</component>
                                        <votes>0</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="1920092" author="xgen-internal-githook" created="Wed, 13 Jun 2018 20:53:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;henrikedin&apos;, &apos;name&apos;: &apos;Henrik Edin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34762&quot; title=&quot;Unclean shutdown prevents startup (iOS)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34762&quot;&gt;&lt;del&gt;SERVER-34762&lt;/del&gt;&lt;/a&gt; Remove lock file on embedded.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 85477a157ab217912eec55422a9d7b2d0e7b0d47)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/aaea3d23d7846af05b71c5f416bda2665606bc44&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/aaea3d23d7846af05b71c5f416bda2665606bc44&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1920041" author="xgen-internal-githook" created="Wed, 13 Jun 2018 20:17:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;henrikedin&apos;, &apos;name&apos;: &apos;Henrik Edin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34762&quot; title=&quot;Unclean shutdown prevents startup (iOS)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34762&quot;&gt;&lt;del&gt;SERVER-34762&lt;/del&gt;&lt;/a&gt; Remove lock file on embedded.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/85477a157ab217912eec55422a9d7b2d0e7b0d47&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/85477a157ab217912eec55422a9d7b2d0e7b0d47&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1914522" author="geert.bosch" created="Thu, 7 Jun 2018 23:27:51 +0000"  >&lt;p&gt;We had a discussion tonight with the world-wide storage team and came to the conclusion that the decision of whether to use a lock file or not is really not storage-engine specific, but instead related to the specific platform / &lt;tt&gt;mongod&lt;/tt&gt; build. A mobile phone may require no lock file, but the same Mobile storage engine in a different embedded Linux environment might still require one.&lt;/p&gt;

&lt;p&gt;We also discussed the fact that many storage engines have their own protection against concurrent use of the same data directory, but that is not really sufficient as the check has to happen earlier, and of course also wouldn&apos;t protect against starting a &lt;tt&gt;mongod&lt;/tt&gt; with two different storage engines.&lt;/p&gt;

&lt;p&gt;So your conclusion was that the decision on whether to use a lock file or not should be a build time decision depending on the platform. One suggested solution was a &lt;tt&gt;scons&lt;/tt&gt; build option. In any case it seems clear that this is an area owned by the platform team and does not really involve storage.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=acm&quot; class=&quot;user-hover&quot; rel=&quot;acm&quot;&gt;acm&lt;/a&gt;, I&apos;m reassigning to platforms for triage.&lt;/p&gt;</comment>
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