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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>
    </build-info>


<item>
            <title>[SERVER-30635] WiredTiger read checksum error</title>
                <link>https://jira.mongodb.org/browse/SERVER-30635</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;mongo crashed again. Please help me fix mongo files. Thanks a lot.&lt;/p&gt;</description>
                <environment></environment>
        <key id="416088">SERVER-30635</key>
            <summary>WiredTiger read checksum error</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="mark.agarunov">Mark Agarunov</assignee>
                                    <reporter username="xigua">Bing Zou</reporter>
                        <labels>
                    </labels>
                <created>Mon, 14 Aug 2017 05:48:31 +0000</created>
                <updated>Wed, 6 Sep 2017 19:42:56 +0000</updated>
                            <resolved>Tue, 15 Aug 2017 18:03:59 +0000</resolved>
                                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1649182" author="xigua" created="Wed, 16 Aug 2017 01:52:08 +0000"  >&lt;p&gt;there is no backup as it&apos;s my local. I guess I will have to start from scratch. &lt;/p&gt;

&lt;p&gt;Thanks for the help.&lt;/p&gt;</comment>
                            <comment id="1648809" author="mark.agarunov" created="Tue, 15 Aug 2017 18:03:48 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=xigua&quot; class=&quot;user-hover&quot; rel=&quot;xigua&quot;&gt;xigua&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Unfortunately, this error indicates that there was additional corruption on the disk. In this situation, my 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; 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;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                            <comment id="1648254" author="xigua" created="Tue, 15 Aug 2017 04:00:27 +0000"  >&lt;p&gt;somehow doesn&apos;t help this time. got the following error while starting up&lt;/p&gt;

&lt;p&gt;2017-08-15T03:56:37.725+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; MongoDB starting : pid=1 port=27017 dbpath=/data/db 64-bit host=2690fba6587a&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; db version v3.4.1&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; git version: 5e103c4f5583e2566a45d740225dc250baacfbd7&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; OpenSSL version: OpenSSL 1.0.1t  3 May 2016&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; allocator: tcmalloc&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; modules: none&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; build environment:&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;     distmod: debian81&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;     distarch: x86_64&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;     target_arch: x86_64&lt;br/&gt;
2017-08-15T03:56:37.726+0000 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; options: { storage: &lt;/p&gt;
{ engine: &quot;wiredTiger&quot; }
&lt;p&gt; }&lt;br/&gt;
2017-08-15T03:56:37.728+0000 W -        &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; Detected unclean shutdown - /data/db/mongod.lock is not empty.&lt;br/&gt;
2017-08-15T03:56:37.737+0000 W STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; Recovering data from the last clean checkpoint.&lt;br/&gt;
2017-08-15T03:56:37.738+0000 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; wiredtiger_open config: create,cache_size=487M,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),&lt;br/&gt;
2017-08-15T03:56:38.958+0000 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; Fatal Assertion 34433 at src/mongo/db/storage/wiredtiger/wiredtiger_record_store.cpp 793&lt;br/&gt;
2017-08-15T03:56:38.958+0000 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;***aborting after fassert() failure&lt;/p&gt;

&lt;p&gt;This is my local mongo inside docker, the /data/db volume is mapped to local disk. My mac crashed a few time the day before which seemed cause the docker mongo failure.&lt;br/&gt;
Please help.&lt;/p&gt;

&lt;p&gt;It&apos;s not production but I do have many databases on my local for my day to day work. My mac is late 2013 MBP with SSD and OS is Sierra. &lt;br/&gt;
Thanks,&lt;br/&gt;
Bing&lt;/p&gt;</comment>
                            <comment id="1647629" author="mark.agarunov" created="Mon, 14 Aug 2017 15:38:32 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=xigua&quot; class=&quot;user-hover&quot; rel=&quot;xigua&quot;&gt;xigua&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for the report. I&apos;ve attached a repair attempt of the files you&apos;ve provided. Would you please extract these files and replace them in your &lt;tt&gt;$dbpath&lt;/tt&gt; and let us know if it resolves the issue? If you are still seeing errors after replacing these files, please provide the complete logs from mongod so that we can further investigate. Additionally, if this issue persists, please provide the following information:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;What kind of underlying storage mechanism are you using? Are the storage devices attached locally or over the network? Are the disks SSDs or HDDs? What kind of RAID and/or volume management system are you using?&lt;/li&gt;
	&lt;li&gt;Would you please check the integrity of your disks?&lt;/li&gt;
	&lt;li&gt;Has the database always been running this version of MongoDB? If not please describe the upgrade/downgrade cycles the database has been through.&lt;/li&gt;
	&lt;li&gt;Have you manipulated (copied or moved) the underlying database files? If so, was mongod running?&lt;/li&gt;
	&lt;li&gt;Have you ever restored this instance from backups?&lt;/li&gt;
	&lt;li&gt;What method do you use to create backups?&lt;/li&gt;
	&lt;li&gt;When was the underlying filesystem last checked and is it currently marked clean?&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="163223" name="SERVER-30635-repair.tar.gz" size="139007" author="mark.agarunov" created="Mon, 14 Aug 2017 15:38:27 +0000"/>
                            <attachment id="163198" name="WiredTiger.turtle" size="979" author="xigua" created="Mon, 14 Aug 2017 05:48:10 +0000"/>
                            <attachment id="163197" name="WiredTiger.wt" size="2805760" author="xigua" created="Mon, 14 Aug 2017 05:48:19 +0000"/>
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