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<channel>
    <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-14676] Index creation caused Fatal Assertion 16967</title>
                <link>https://jira.mongodb.org/browse/SERVER-14676</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On OSX, with mongo version:&lt;br/&gt;
db version v2.6.0&lt;br/&gt;
2014-07-24T16:08:10.119-0500 git version: nogitversion&lt;/p&gt;

&lt;p&gt;Single server, no replica sets. Mongo crashed when I tried to ensureIndex on a collection. I had previously (as in a few minutes before) successfully added other indexes.&lt;/p&gt;

&lt;p&gt;Mongo starts back up but db.repairDatabase() crashes it again. It is a relatively small/medium sized collection - about 11 million rows at a taking up about 10GB of disk space.&lt;/p&gt;

&lt;p&gt;Snippet below (see full stack traces attached)&lt;/p&gt;
&lt;p/&gt;
&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;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&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;014-07-24T15:48:43.790-0500 [conn1] 		Index Build: 8066000/11203300	71%&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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;2014-07-24T15:48:46.000-0500 [conn1] 		Index Build: 9142100/11203300	81%&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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;2014-07-24T15:48:48.844-0500 [conn1] Confirmation.actionLog Fatal Assertion 16967&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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;2014-07-24T15:48:48.848-0500 [conn1] Confirmation.actionLog 0x10e60b3ea 0x10e5c11c4 0x10e5af9cb 0x10e40bdb3 0x10e40bddc 0x10e438b15 0x10e1113ef 0x10e31363b 0x10dffb97a 0x10dffc8e5 0x10dff2f0a 0x10e028d14 0x10e0c0869 0x10e0c164e 0x10e0c2921 0x10e2fd2ac 0x10e1af18f 0x10defb41e 0x10e5cebe6 0x10e63f111&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 0   mongod                              0x000000010e60b3ea _ZN5mongo15printStackTraceERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEE + 58&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 1   mongod                              0x000000010e5c11c4 _ZN5mongo10logContextEPKc + 196&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 2   mongod                              0x000000010e5af9cb _ZN5mongo13fassertFailedEi + 187&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 3   mongod                              0x000000010e40bdb3 _ZNK5mongo13ExtentManager21getNextRecordInExtentERKNS_7DiskLocE + 179&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 4   mongod                              0x000000010e40bddc _ZNK5mongo13ExtentManager13getNextRecordERKNS_7DiskLocE + 28&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 5   mongod                              0x000000010e438b15 _ZN5mongo12FlatIterator7getNextEv + 85&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 6   mongod                              0x000000010e1113ef _ZN5mongo14CollectionScan4workEPm + 303&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 7   mongod                              0x000000010e31363b _ZN5mongo12PlanExecutor7getNextEPNS_7BSONObjEPNS_7DiskLocE + 267&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 8   mongod                              0x000000010dffb97a _ZN5mongo18addExistingToIndexEPNS_10CollectionEPKNS_15IndexDescriptorEPNS_17IndexAccessMethodEb + 890&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 9   mongod                              0x000000010dffc8e5 _ZN5mongo12buildAnIndexEPNS_10CollectionEPNS_17IndexCatalogEntryEb + 1365&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 10  mongod                              0x000000010dff2f0a _ZN5mongo12IndexCatalog11createIndexENS_7BSONObjEbNS0_16ShutdownBehaviorE + 1290&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 11  mongod                              0x000000010e028d14 _ZN5mongo14CmdCreateIndex3runERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEERNS_7BSONObjEiRS7_RNS_14BSONObjBuilderEb + 5892&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 12  mongod                              0x000000010e0c0869 _ZN5mongo12_execCommandEPNS_7CommandERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEERNS_7BSONObjEiRS8_RNS_14BSONObjBuilderEb + 41&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 13  mongod                              0x000000010e0c164e _ZN5mongo7Command11execCommandEPS0_RNS_6ClientEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb + 2286&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 14  mongod                              0x000000010e0c2921 _ZN5mongo12_runCommandsEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi + 1313&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 15  mongod                              0x000000010e2fd2ac _ZN5mongo11newRunQueryERNS_7MessageERNS_12QueryMessageERNS_5CurOpES1_ + 876&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 16  mongod                              0x000000010e1af18f _ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE + 2351&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 17  mongod                              0x000000010defb41e _ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE + 190&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 18  mongod                              0x000000010e5cebe6 _ZN5mongo17PortMessageServer17handleIncomingMsgEPv + 1078&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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; 19  mongod                              0x000000010e63f111 _ZN5boost12_GLOBAL__N_112thread_proxyEPv + 177&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 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;2014-07-24T15:48:48.848-0500 [conn1]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="148981">SERVER-14676</key>
            <summary>Index creation caused Fatal Assertion 16967</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="ramon.fernandez@mongodb.com">Ramon Fernandez Marina</assignee>
                                    <reporter username="ryan.carmichael@elabsolutions.com">Ryan Carmichael</reporter>
                        <labels>
                    </labels>
                <created>Thu, 24 Jul 2014 21:14:11 +0000</created>
                <updated>Tue, 16 Nov 2021 17:35:44 +0000</updated>
                            <resolved>Tue, 12 Aug 2014 18:42:44 +0000</resolved>
                                    <version>2.6.0</version>
                                                    <component>Index Maintenance</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="688451" author="ramon.fernandez" created="Tue, 12 Aug 2014 18:42:22 +0000"  >&lt;p&gt;Thanks for the update &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ryan.carmichael%40elabsolutions.com&quot; class=&quot;user-hover&quot; rel=&quot;ryan.carmichael@elabsolutions.com&quot;&gt;ryan.carmichael@elabsolutions.com&lt;/a&gt;, glad to hear 2.6.3 is working for you. We&apos;re going to mark this ticket as resolved, since not having database files makes it impossible to do any further investigation.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                            <comment id="688216" author="ryan.carmichael@elabsolutions.com" created="Tue, 12 Aug 2014 15:56:45 +0000"  >&lt;p&gt;Just as a sort of final comment on my side, I updated to 2.6.3, wiped the database and did bunch more inserts with the same data, ensureIndexes, etc., etc., all with logLevel set to 1. Everything was A-OK, no repeats of the crash, repairDb runs with no issues. Removed all the data, inserted the 11M rows again, several times. All good.&lt;/p&gt;</comment>
                            <comment id="678933" author="ramon.fernandez" created="Fri, 1 Aug 2014 17:44:09 +0000"  >&lt;p&gt;Thanks for the update &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rcarmich&quot; class=&quot;user-hover&quot; rel=&quot;rcarmich&quot;&gt;rcarmich&lt;/a&gt;. I&apos;m going to keep this open a tad longer and revisit the stack traces to see if we can find something.&lt;/p&gt;

&lt;p&gt;One suggestion for your consideration is to &lt;a href=&quot;http://docs.mongodb.org/manual/reference/parameters/#param.logLevel&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;increase the &lt;tt&gt;logLevel&lt;/tt&gt; to 1&lt;/a&gt; if you re-insert the data. If there&apos;s a bug in MongoDB and you hit the problem again, the verbose logs may help us find out what&apos;s going on.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                            <comment id="678831" author="ryan.carmichael@elabsolutions.com" created="Fri, 1 Aug 2014 16:11:33 +0000"  >&lt;p&gt;Unfortunately I have not been able to easily reproduce this again. I suppose the ticket could be closed. If this were a production system I would be able to spend more time figuring it out but since it is a development machine it will be easier to just wipe the data. Thanks for looking into it.&lt;/p&gt;</comment>
                            <comment id="674408" author="ryan.carmichael@elabsolutions.com" created="Tue, 29 Jul 2014 02:03:24 +0000"  >&lt;p&gt;This is the type of data inserted (about 11 million rows of it). The data below is fake, not real patient info.&lt;/p&gt;

{ _id: ObjectId(&apos;53d150edd6c4a034594b1eb7&apos;), action: &quot;Added medication &apos;XANAX&apos;&quot;, objectType: &quot;com.xyz.abc.Specimen&quot;, searchParams: &quot;Jim|Dr. XYZ|111223X|Urine|123-555-1212|St. Louis|MO|St. Louis|J234382|Smith|111_111223X|&quot;, username: &quot;myusername&quot;, eventId: 16, eventTime: new Date(1402423097000), objectId: 529237 }

&lt;p&gt;The indexes I had were on:&lt;br/&gt;
username&lt;br/&gt;
objectId&lt;/p&gt;

&lt;p&gt;The index I was trying to add when it crashed:&lt;br/&gt;
eventId&lt;/p&gt;

&lt;p&gt;I was adding them via:&lt;/p&gt;

&lt;p&gt;db.actionLog.ensureIndex(&lt;/p&gt;
{username: 1}
&lt;p&gt;)&lt;br/&gt;
db.actionLog.ensureIndex(&lt;/p&gt;
{objectId: 1}
&lt;p&gt;)&lt;br/&gt;
db.actionLog.ensureIndex(&lt;/p&gt;
{eventId: 1}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;I am not aware of any unclean shutdowns.. Couldn&apos;t find any indication of such in the log files, except for the ones I had when the issue started and it crashed during the index build.&lt;/p&gt;

&lt;p&gt;The SMART status of my hard drive is fine. I will try to run a full diagnostic of it tomorrow.&lt;/p&gt;</comment>
                            <comment id="674247" author="ramon.fernandez" created="Mon, 28 Jul 2014 22:36:49 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rcarmich&quot; class=&quot;user-hover&quot; rel=&quot;rcarmich&quot;&gt;rcarmich&lt;/a&gt;, did you have any unclean shutdowns before the problems started? Also, can you tell us a bit more about the number of indexes and their shape? Also, how were you building those indexes? Finally, can you double-check the health of your hard drives? Flaky drives are a common cause for data corruption, and we need to rule that option out no matter how unlikely.&lt;/p&gt;

&lt;p&gt;I&apos;m trying to reproduce on my end with sample documents containing numbers, strings, and arrays of numbers. If you manage to reproduce the problem with data you can share please let us know.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                            <comment id="672090" author="ryan.carmichael@elabsolutions.com" created="Sat, 26 Jul 2014 02:10:35 +0000"  >&lt;p&gt;Unfortunately the data contains patient information and is not something I can share. It probably doesn&apos;t help any but what preceded this issue was me inserting a bunch of data into the table, creating some indexes, and then db.actionLog.remove({}). I loaded and erased the data probably 6 or 7 times, doing db.repairDatabase() several times in between. Basically just messing around with converting some mysql data into mongo.&lt;/p&gt;

&lt;p&gt;On Monday I will attempt to recreate the issue with non sensitive data, but I expect it will be difficult to reproduce. In this case the loss or corruption of data isn&apos;t important because it was on a development machine... Just have to convince my boss this won&apos;t happen in production &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="671919" author="ramon.fernandez" created="Fri, 25 Jul 2014 21:47:08 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rcarmich&quot; class=&quot;user-hover&quot; rel=&quot;rcarmich&quot;&gt;rcarmich&lt;/a&gt;, looks like your indexes are corrupted, but I would not expect &lt;tt&gt;db.repairDatabase()&lt;/tt&gt; to cause a crash. Is there a chance we can get a copy of your data so we can investigate this problem? If this is an option, we can provide a way to upload the data securely and confidentially &amp;#8211; please let us know.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                    </comments>
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