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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-48606] Unhandled exception in WTCheckpointThread</title>
                <link>https://jira.mongodb.org/browse/SERVER-48606</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After upgrading our nodes to 4.2.7 we&apos;ve been getting unhandled exceptions sporadically. The mongod.exe ends up terminating and this is affecting terribly our live environment.&#160;&lt;/p&gt;

&lt;p&gt;The exception from the mongodb.log is as follows:&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;2020-06-04T06:29:59.276-0500 F CONTROL &lt;span class=&quot;error&quot;&gt;&amp;#91;WTCheckpointThread&amp;#93;&lt;/span&gt; *** unhandled exception (access violation) at 0x00007FF649BBB29A, terminating&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;2020-06-04T06:29:59.276-0500 F CONTROL &lt;span class=&quot;error&quot;&gt;&amp;#91;WTCheckpointThread&amp;#93;&lt;/span&gt; *** access violation was a read from 0x2667ffeee&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;2020-06-04T06:29:59.276-0500 F CONTROL &lt;span class=&quot;error&quot;&gt;&amp;#91;WTCheckpointThread&amp;#93;&lt;/span&gt; *** stack trace for unhandled exception:&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;2020-06-04T06:30:00.611-0500 I - &lt;span class=&quot;error&quot;&gt;&amp;#91;WTCheckpointThread&amp;#93;&lt;/span&gt; mongod.exe ...\src\third_party\gperftools-2.7\dist\src\tcmalloc.cc(1972) tc_calloc+0x9a&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\os_common\os_alloc.c(50) __wt_calloc+0x5a&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\block\block_session.c(34) __block_ext_alloc+0x57&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\block\block_ext.c(233) __block_off_insert+0x2a&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\block\block_ext.c(1005) __block_merge+0x1b0&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\block\block_ext.c(894) __wt_block_extlist_merge+0x30a&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\block\block_ckpt.c(654) __ckpt_process+0x3b0&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\block\block_ckpt.c(255) __wt_block_checkpoint+0xa4&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\btree\bt_io.c(346) __wt_bt_write+0x3cc&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\reconcile\rec_write.c(2303) __rec_write_wrapup+0x5f1&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\reconcile\rec_write.c(209) __reconcile+0x2e2&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\reconcile\rec_write.c(102) __wt_reconcile+0x176&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\reconcile\rec_write.c(516) __rec_root_write+0x20b&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\reconcile\rec_write.c(278) __reconcile+0x5ad&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\reconcile\rec_write.c(102) __wt_reconcile+0x176&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\btree\bt_sync.c(311) __wt_sync_file+0x620&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\txn\txn_ckpt.c(1578) __checkpoint_tree+0x169&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\txn\txn_ckpt.c(1686) __checkpoint_tree_helper+0x55&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\txn\txn_ckpt.c(199) __checkpoint_apply+0x56&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\txn\txn_ckpt.c(848) __txn_checkpoint+0x50d&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\txn\txn_ckpt.c(1043) __txn_checkpoint_wrapper+0x189&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\txn\txn_ckpt.c(1101) __wt_txn_checkpoint+0x112&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\third_party\wiredtiger\src\session\session_api.c(1962) __session_checkpoint+0x3bc&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\mongo\db\storage\wiredtiger\wiredtiger_kv_engine.cpp(375) mongo::WiredTigerKVEngine::WiredTigerCheckpointThread::run+0x78a&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe ...\src\mongo\util\background.cpp(154) mongo::BackgroundJob::jobBody+0x145&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe c:\program files (x86)\microsoft visual studio\2017\professional\vc\tools\msvc\14.16.27023\include\thr\xthread(230) std::_LaunchPad&amp;lt;std::unique_ptr&amp;lt;std::tuple&amp;lt;&amp;lt;lambda_e94772a372767cbd7bebbcdd24044cf3&amp;gt; &amp;gt;,std::default_delete&amp;lt;std::tuple&amp;lt;&amp;lt;lambda_e94772a372767cbd7bebbcdd24044cf3&amp;gt; &amp;gt; &amp;gt; &amp;gt; &amp;gt;::_Go+0x6d&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;mongod.exe c:\program files (x86)\microsoft visual studio\2017\professional\vc\tools\msvc\14.16.27023\include\thr\xthread(209) std::_Pad::_Call_func+0x9&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;ucrtbase.dll o_exp+0x5a&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;KERNEL32.DLL BaseThreadInitThunk+0x14&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;2020-06-04T06:30:00.612-0500 I CONTROL &lt;span class=&quot;error&quot;&gt;&amp;#91;WTCheckpointThread&amp;#93;&lt;/span&gt; writing minidump diagnostic file C:\MMSAutomation\versions\mongodb-win32-x86_64-4.2.7-ent\bin\mongod.2020-06-04T11-30-00.mdmp&lt;/tt&gt;&lt;br/&gt;
&lt;tt&gt;2020-06-04T06:30:01.395-0500 I NETWORK &lt;span class=&quot;error&quot;&gt;&amp;#91;listener&amp;#93;&lt;/span&gt; connection accepted from 169.254.1.2:64568 #6240 (97 connections now open)&lt;/tt&gt;&lt;br/&gt;
{{2020-06-04T06:30:01.395-0500 I NETWORK &lt;span class=&quot;error&quot;&gt;&amp;#91;conn6240&amp;#93;&lt;/span&gt; received client metadata from 169.254.1.2:64568 conn6240: { driver: &lt;/p&gt;
{ name: &quot;mongo-go-driver&quot;, version: &quot;v1.1.4&quot; }
&lt;p&gt;, os: { type: &quot;windows&quot;, architecture: &quot;amd64&quot; }, platform: &quot;go1.14.2&quot; }}}&lt;br/&gt;
&lt;tt&gt;2020-06-04T06:30:01.401-0500 F CONTROL &lt;span class=&quot;error&quot;&gt;&amp;#91;WTCheckpointThread&amp;#93;&lt;/span&gt; *** immediate exit due to unhandled exception&lt;/tt&gt;&lt;/p&gt;</description>
                <environment>Windows Server 2019 Standard&lt;br/&gt;
&lt;br/&gt;
Dell Server PER540&lt;br/&gt;
&lt;br/&gt;
Processor: Intel(R) Xeon(R) Silver 4212 CPU @ 2.20GHz (2 processors)&lt;br/&gt;
&lt;br/&gt;
RAM: 128 GB&lt;br/&gt;
&lt;br/&gt;
Hard Disk: Dell PERC H740P Apd SCSI</environment>
        <key id="1372970">SERVER-48606</key>
            <summary>Unhandled exception in WTCheckpointThread</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="diana@orionswave.com">Diana Zhivkova</reporter>
                        <labels>
                    </labels>
                <created>Fri, 5 Jun 2020 04:46:39 +0000</created>
                <updated>Fri, 5 Jun 2020 16:00:14 +0000</updated>
                            <resolved>Fri, 5 Jun 2020 08:15:40 +0000</resolved>
                                    <version>4.2.7</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3192566" author="keith.smith" created="Fri, 5 Jun 2020 15:51:06 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=pasette&quot; class=&quot;user-hover&quot; rel=&quot;pasette&quot;&gt;pasette&lt;/a&gt;. That&apos;s correct, &lt;a href=&quot;https://jira.mongodb.org/browse/WT-6366&quot; title=&quot;Off-by-one overflow in block-modification bitmaps for incremental backup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-6366&quot;&gt;&lt;del&gt;WT-6366&lt;/del&gt;&lt;/a&gt; should only happen when incremental backup is used; It doesn&apos;t matter whether it&apos;s invoked via ops mgr. &#160;I can&apos;t tell from the error whether the customer has incrementals enabled, but the stack trace is exactly what we&apos;ve seen in other &lt;a href=&quot;https://jira.mongodb.org/browse/WT-6366&quot; title=&quot;Off-by-one overflow in block-modification bitmaps for incremental backup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-6366&quot;&gt;&lt;del&gt;WT-6366&lt;/del&gt;&lt;/a&gt; failures.&lt;/p&gt;</comment>
                            <comment id="3192040" author="diana@orionswave.com" created="Fri, 5 Jun 2020 12:03:11 +0000"  >&lt;p&gt;Confirmed. Downgrading to 4.6.2 removes the issues.&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;</comment>
                            <comment id="3191874" author="dan@10gen.com" created="Fri, 5 Jun 2020 10:14:26 +0000"  >&lt;p&gt;To workaround until 4.2.8 is released, please downgrade to 4.2.6&lt;/p&gt;</comment>
                            <comment id="3191787" author="alexander.gorrod" created="Fri, 5 Jun 2020 08:15:16 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=diana%40orionswave.com&quot; class=&quot;user-hover&quot; rel=&quot;diana@orionswave.com&quot;&gt;diana@orionswave.com&lt;/a&gt; - thanks for reporting this issue, and we are sorry that you encountered it. I believe it is a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/WT-6366&quot; title=&quot;Off-by-one overflow in block-modification bitmaps for incremental backup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-6366&quot;&gt;&lt;del&gt;WT-6366&lt;/del&gt;&lt;/a&gt; - which we have a fix in process for, and will be available in an upcoming MongoDB 4.2.8 release. Please follow that ticket to track the progress of the fix.&lt;/p&gt;</comment>
                    </comments>
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