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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-47617] On Sharding,  WiredTiger error : calculated block checksum  doesn&apos;t match expected checksum</title>
                <link>https://jira.mongodb.org/browse/SERVER-47617</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For the service, we make database at once.&lt;/p&gt;

&lt;p&gt;The build database process is &lt;br/&gt;
1. insert data for 140 collections&lt;br/&gt;
2. build 350 index &lt;br/&gt;
3. add shard 140 collections.&lt;/p&gt;

&lt;p&gt;When shard collections, we met log message below.&lt;/p&gt;

&lt;p&gt;We used mongoDB 4.2.0 and 4.2.5. and got simular error message.&lt;/p&gt;

&lt;p&gt;Servers are one mongos, three mongo config servers for one replication set and three shard servers each for the first replication set.&lt;/p&gt;

&lt;p&gt;Could you give us an advice what we should check for it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1318863">SERVER-47617</key>
            <summary>On Sharding,  WiredTiger error : calculated block checksum  doesn&apos;t match expected checksum</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="carl.champain@mongodb.com">Carl Champain</assignee>
                                    <reporter username="jjongei0@gmail.com">jongsun moon</reporter>
                        <labels>
                            <label>repair</label>
                            <label>repairDatabase</label>
                    </labels>
                <created>Fri, 17 Apr 2020 08:10:34 +0000</created>
                <updated>Thu, 23 Apr 2020 19:29:59 +0000</updated>
                            <resolved>Thu, 23 Apr 2020 19:29:38 +0000</resolved>
                                    <version>4.2.0</version>
                    <version>4.2.5</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3053321" author="carl.champain" created="Thu, 23 Apr 2020 19:29:25 +0000"  >&lt;p&gt;I&apos;m sorry to hear that &lt;tt&gt;--repair&lt;/tt&gt; didn&apos;t work! I&apos;m going to close this ticket now.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
 Carl&lt;br/&gt;
 &#160;&lt;/p&gt;</comment>
                            <comment id="3052158" author="jjongei0@gmail.com" created="Thu, 23 Apr 2020 01:51:03 +0000"  >&lt;p&gt;Oh... I see.&lt;/p&gt;

&lt;p&gt;We ran --repair on&#160;the server that contains corrupted data. But it gave us same error message.&lt;/p&gt;

&lt;p&gt;Anyway, as you pointed out, it seems to be happened because of physical problem.&#160;&#160;&lt;/p&gt;

&lt;p&gt;With&#160;new&#160;physical&#160;server, it works well until now.&lt;/p&gt;

&lt;p&gt;Thank you for your help.&lt;/p&gt;</comment>
                            <comment id="3051004" author="carl.champain" created="Wed, 22 Apr 2020 14:57:04 +0000"  >&lt;p&gt;Then you should run&#160;&lt;tt&gt;--repair&lt;/tt&gt;&#160;on the server that contains corrupted data.&lt;/p&gt;</comment>
                            <comment id="3050328" author="jjongei0@gmail.com" created="Wed, 22 Apr 2020 03:38:19 +0000"  >&lt;p&gt;We have three shard cluster.&lt;/p&gt;

&lt;p&gt;Each shard cluster has only one server as primary server of replication set.(no slave server.)&lt;/p&gt;</comment>
                            <comment id="3049203" author="carl.champain" created="Tue, 21 Apr 2020 15:20:07 +0000"  >&lt;p&gt;Are the shard servers part of the same replica set? If so, we recommend&#160;a clean&#160;&lt;a href=&quot;https://docs.mongodb.org/manual/tutorial/resync-replica-set-member/#automatically-sync-a-member&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;resync&lt;/a&gt;&#160;from an unaffected node.&lt;/p&gt;</comment>
                            <comment id="3048476" author="jjongei0@gmail.com" created="Tue, 21 Apr 2020 03:35:24 +0000"  >&lt;p&gt;Hi&#160;Carl&#160;Champain,&lt;/p&gt;

&lt;p&gt;Thank&#160;you&#160;for&#160;your&#160;kindly&#160;comment.&lt;/p&gt;

&lt;p&gt;I&#160;have&#160;a&#160;question.&lt;br/&gt;
I&#160;have&#160;three&#160;shard&#160;server.&#160;And&#160;I&#160;should&#160;have&#160;run&#160;&quot;--repair&quot;&#160;all&#160;shard&#160;server?&lt;/p&gt;

&lt;p&gt;Below&#160;is&#160;what&#160;we&#160;did.&lt;br/&gt;
1.&#160;run&#160;&quot;-&lt;del&gt;repair&quot;&#160;on&#160;the&#160;server&#160;which&#160;had&#160;problem.&#160;&#160;&lt;/del&gt;&amp;gt;&#160;&#160;It&#160;did&#160;not&#160;work.&lt;br/&gt;
2.&#160;Use&#160;new&#160;physical&#160;server&#160;and&#160;run&#160;&quot;-&lt;del&gt;repair&quot;&#160;&lt;/del&gt;&amp;gt;&#160;&#160;It&#160;did&#160;not&#160;work.&#160;&lt;br/&gt;
&#160;&#160;&#160;:&#160;we&#160;copied&#160;$dbpath&#160;directory&#160;to&#160;the&#160;new&#160;physical&#160;server,&#160;then&#160;started&#160;mongod&#160;after&#160;changing&#160;shard&#160;server&#160;ip&#160;and&#160;replication&#160;set&#160;ip&#160;as&#160;the&#160;new&#160;physical&#160;server&#160;ip.&lt;br/&gt;
3.&#160;With&#160;new&#160;physical&#160;server,&#160;now&#160;we&#160;have&#160;done&#160;building&#160;database&#160;processs&#160;newly.&#160;-&amp;gt;&#160;in&#160;progress.&lt;/p&gt;

&lt;p&gt;I&#160;will&#160;let&#160;you&#160;know&#160;the&#160;#3&#160;result.&lt;/p&gt;

&lt;p&gt;Regards,&lt;/p&gt;</comment>
                            <comment id="3047172" author="carl.champain" created="Mon, 20 Apr 2020 15:16:23 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jjongei0%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;jjongei0@gmail.com&quot;&gt;jjongei0@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;This error message leads us to suspect some form of physical corruption. Please make a complete copy of the database&apos;s &lt;tt&gt;$dbpath&lt;/tt&gt; directory to safeguard so that you can work off of the current &lt;tt&gt;$dbpath&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;The ideal resolution is to perform a clean &lt;a href=&quot;https://docs.mongodb.org/manual/tutorial/resync-replica-set-member/#automatically-sync-a-member&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;resync&lt;/a&gt; from an unaffected node. &lt;/p&gt;

&lt;p&gt;You can also try &lt;a href=&quot;https://docs.mongodb.com/manual/reference/program/mongod/#cmdoption-mongod-repair&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;mongod --repair&lt;/tt&gt;&lt;/a&gt; using the latest version of MongoDB.&lt;/p&gt;

&lt;p&gt;In the event that a &lt;tt&gt;--repair&lt;/tt&gt; operation is unsuccessful, then please also provide:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;The logs of the repair operation.&lt;/li&gt;
	&lt;li&gt;The logs of any attempt to start mongod after the repair operation completed.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Kind regards,&lt;br/&gt;
Carl&lt;/p&gt;</comment>
                    </comments>
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                            <attachment id="256408" name="shard_us_1.log" size="353246" author="jjongei0@gmail.com" created="Fri, 17 Apr 2020 08:09:01 +0000"/>
                            <attachment id="256407" name="shard_us_1.log.2020-04-01T02-14-46" size="22393530" author="jjongei0@gmail.com" created="Fri, 17 Apr 2020 08:10:26 +0000"/>
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&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&#160;2020-04-16T17:17:52.001+0900 I SHARDING [migrateThread] Finished deleting IPOFFICE_200201_US.TBL_FEA_CRH_KW_TECHCATE range [\{ _id: ObjectId(&apos;5e90bdabaf8f0460a6c7cfb7&apos;) }, \{ _id: ObjectId(&apos;5e90bdac0fa88058daa0deb6&apos;) })&lt;/span&gt;&lt;/pre&gt;
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