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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-35857] Mongo db not able to start</title>
                <link>https://jira.mongodb.org/browse/SERVER-35857</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Unable to start mongodb server. It is contain valid data so can&apos;t afford to lose it. I can provide mdmp file.&lt;/p&gt;</description>
                <environment>Windows 10</environment>
        <key id="565006">SERVER-35857</key>
            <summary>Mongo db not able to start</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="9">Done</resolution>
                                        <assignee username="nick.brewer">Nick Brewer</assignee>
                                    <reporter username="rbokhari">Syed Rahman Bokhari</reporter>
                        <labels>
                            <label>envh</label>
                            <label>rns</label>
                            <label>rpu</label>
                            <label>trcf</label>
                            <label>wtc</label>
                    </labels>
                <created>Thu, 28 Jun 2018 09:25:13 +0000</created>
                <updated>Tue, 4 Sep 2018 03:02:57 +0000</updated>
                            <resolved>Fri, 29 Jun 2018 17:38:22 +0000</resolved>
                                    <version>3.4.10</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1935380" author="rbokhari" created="Fri, 29 Jun 2018 20:55:53 +0000"  >&lt;p&gt;For Journel files, in few minutes it add multiple 100 MB journel files.&#160;&lt;/p&gt;</comment>
                            <comment id="1935321" author="nick.brewer" created="Fri, 29 Jun 2018 20:06:09 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rbokhari&quot; class=&quot;user-hover&quot; rel=&quot;rbokhari&quot;&gt;rbokhari&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I&apos;m afraid there&apos;s nothing we can do on our end to recover the data files if the repair attempt failed. &lt;/p&gt;

&lt;p&gt;One other thing I&apos;d note: Files in the &lt;tt&gt;dbPath&lt;/tt&gt; should not be interacted with externally while they are in use by mongod - in some instances, I&apos;ve seen antivirus scans on such files cause corruption.&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;Also, I like to ask that journel size is keep growing at alot, and reaches few GBs now.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;The amount of space taken up by journal files is largely determined by the number of operations being performed. However, WiredTiger automatically removes log files  - are you finding that this is not the case? How quickly is the amount of used space growing? &lt;/p&gt;

&lt;p&gt;Nick&lt;/p&gt;</comment>
                            <comment id="1935279" author="rbokhari" created="Fri, 29 Jun 2018 19:34:03 +0000"  >&lt;p&gt;This is normal windows 10 computer with local hard drive and no replica or nodes.&#160;&lt;/p&gt;

&lt;p&gt;Is there any other solution that I check as per my description. Also, I like to ask that journel size is keep growing at alot, and reaches few GBs now. How to reduce that with wiredTiger storage engine.&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;</comment>
                            <comment id="1935096" author="nick.brewer" created="Fri, 29 Jun 2018 17:38:05 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rbokhari&quot; class=&quot;user-hover&quot; rel=&quot;rbokhari&quot;&gt;rbokhari&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Unfortunately, this error indicates that there was corruption on the disk, most often caused by a faulty storage layer. In this situation, our best recommendation would be to &lt;a href=&quot;https://docs.mongodb.com/manual/tutorial/resync-replica-set-member/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;resync the affected node&lt;/a&gt; if it is a member of a replica set, or &lt;a href=&quot;https://docs.mongodb.com/manual/core/backups/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;restore from a backup&lt;/a&gt; if possible.&lt;/p&gt;

&lt;p&gt;To prevent this type of problem in the future please take note of the following guidelines to help mitigate any issues related to unreliable storage layers or server failures. &lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Make sure your &lt;a href=&quot;https://docs.mongodb.com/manual/administration/production-notes/#disk-and-storage-systems&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;underlying storage is configured in an optimal way&lt;/a&gt;.&lt;/li&gt;
	&lt;li&gt;Schedule and perform regular checks of the integrity of your filesystems and disks.&lt;/li&gt;
	&lt;li&gt;Make sure to update MongoDB to the &lt;a href=&quot;https://docs.mongodb.com/manual/release-notes/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;most recent version&lt;/a&gt;.&lt;/li&gt;
	&lt;li&gt;Never manipulate the underlying database files in any way while &lt;tt&gt;mongod&lt;/tt&gt; is running.&lt;/li&gt;
	&lt;li&gt;Always keep up to date &lt;a href=&quot;https://docs.mongodb.com/manual/core/backups/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;backups of your databases&lt;/a&gt; and verify that you have a process in place to restore them.&lt;/li&gt;
	&lt;li&gt;Use a &lt;a href=&quot;https://docs.mongodb.com/manual/replication/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;replica set&lt;/a&gt; for improved reliability.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Regards,&lt;br/&gt;
Nick&lt;/p&gt;</comment>
                            <comment id="1935084" author="rbokhari" created="Fri, 29 Jun 2018 17:27:31 +0000"  >&lt;p&gt;Still after replacing two repaired files, mongo db service is not running. I am attaching new dump file.&lt;/p&gt;

&lt;p&gt;Many Thanks for your timely response, can you advise further ?&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="1934948" author="nick.brewer" created="Fri, 29 Jun 2018 15:55:09 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rbokhari&quot; class=&quot;user-hover&quot; rel=&quot;rbokhari&quot;&gt;rbokhari&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I&apos;ve attached the files after a repair attempt. Would you please extract these files, substitute them for the current ones in your &lt;tt&gt;$dbpath&lt;/tt&gt;, and let us know if it resolves the issue?&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Nick&lt;/p&gt;

&lt;p&gt; &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/190562/190562_repair-attempt.tar.gz&quot; title=&quot;repair-attempt.tar.gz attached to SERVER-35857&quot;&gt;repair-attempt.tar.gz&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="1934579" author="rbokhari" created="Fri, 29 Jun 2018 06:29:23 +0000"  >&lt;p&gt;I have added required two files, please have a look into it and repair those.&lt;/p&gt;

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

&lt;p&gt;Many Thanks&lt;/p&gt;</comment>
                            <comment id="1933550" author="ramon.fernandez" created="Thu, 28 Jun 2018 12:41:47 +0000"  >&lt;p&gt;Can you please upload the &lt;tt&gt;WiredTiger.wt&lt;/tt&gt; and &lt;tt&gt;WiredTiger.turtle&lt;/tt&gt; files so we can run a repair attempt?&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="190532" name="WiredTiger.turtle" size="1005" author="rbokhari" created="Fri, 29 Jun 2018 06:28:39 +0000"/>
                            <attachment id="190531" name="WiredTiger.wt" size="126976" author="rbokhari" created="Fri, 29 Jun 2018 06:28:35 +0000"/>
                            <attachment id="190463" name="log.2018-06-28T09-09-03" size="14199" author="rbokhari" created="Thu, 28 Jun 2018 09:26:03 +0000"/>
                            <attachment id="190573" name="log.2018-06-29T17-22-47" size="2213" author="rbokhari" created="Fri, 29 Jun 2018 17:27:21 +0000"/>
                            <attachment id="190562" name="repair-attempt.tar.gz" size="4640" author="nick.brewer" created="Fri, 29 Jun 2018 15:54:57 +0000"/>
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