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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-19101] ERROR: writer worker caught exception:  :: caused by :: 10287 insertDocument :: caused by :: 10287 btree: key+recloc already in index on</title>
                <link>https://jira.mongodb.org/browse/SERVER-19101</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;two members of a replica set can&apos;t restart after unclean shut down(power loss), we use version 2.6.1&lt;/p&gt;

&lt;p&gt;at first, the primary power loss, then restart, we find logs :&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;2015-05-30T14:31:54.231+0800 [repl writer worker 1] omm_spc.vcm_lpr_info  caught assertion addKeysToIndex omm_spc.vcm_lpr_info.$src_1_id: ObjectId(&apos;556955b9498ebd989bba8da3&apos;)&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;2015-05-30T14:31:54.232+0800 [repl writer worker 1] ERROR: writer worker caught exception:  :: caused by :: 10287 insertDocument :: caused by :: 10287 btree: key+recloc already in index on: { ts: Timestamp 1432966585000|10, h: -2776666315254503545, v: 2, op: &quot;i&quot;, ns: &quot;omm_spc.vcm_lpr_info&quot;, o: { _id: ObjectId(&apos;556955b9498ebd989bba8da3&apos;), ctime: 20150530141625, alarm: &quot;637503ee069311e582bad8490bc947d4004588&quot;, cmrid: 14291, dflag: false, lpr: { bright: 1, color: 0, coords: { bottom: 0.983, left: 0.231, right: 0.282, top: 0.962 }, direc: 0, match: 91, pcolor: 6, pnr: &quot;AT664T&quot;, ptype: 1 }, src: 2, stime: 20150530141620, vdid: &quot;&quot;, vsid: 421 } }&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;2015-05-30T14:31:54.232+0800 [repl writer worker 1] Fatal Assertion 16360&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;2015-05-30T14:31:54.232+0800 [repl writer worker 1] &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;&amp;nbsp;&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;***aborting after fassert() failure&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;


&lt;p&gt;after restart 10 times, we find logs :&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;2015-05-30T16:34:45.752+0800 [rsBackgroundSync] replSet syncing to: BH-DCMN:8888&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;2015-05-30T16:34:45.754+0800 [rsBackgroundSync] replset setting syncSourceFeedback to BH-DCMN:8888&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;2015-05-30T16:34:45.766+0800 [rsSync] replSet still syncing, not yet to minValid optime 556955bb:6&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;2015-05-30T16:34:45.922+0800 [repl writer worker 1] ERROR: writer worker caught exception:  :: caused by :: 13440 bad offset:0 accessing file: /sre_storage/data1/mongo/omm_spc.0. See http://dochub.mongodb.org/core/data-recovery on: { ts: Timestamp 1432966583000|8, h: 6965683350597498871, v: 2, op: &quot;i&quot;, ns: &quot;omm_spc.omm_case_file&quot;, o: { _id: ObjectId(&apos;556955b7498ee6b560cd1c61&apos;), _fileId: &quot;aceaa504-9867-450b-a9f0-8dcf23d29fd8&quot;, _len: 449594, _host: [ { _m_id: &quot;6&quot;, _s_inx: 4 } ], _objectType: &quot;RESOURCE_TYPE&quot;, fdescr: &quot;&quot;, _ctime: new Date(1432966583201), online: false, longi: &quot;117.30741844508651&quot;, timestamp: 0, cmrId: 4655, height: 0, offset: &quot;3728:42&quot;, vhflag: 0, _acls: [], msStatus: 1, _mtime: new Date(1432966583201), _resourceLastRead: new Date(1432966583201), vendor: 0, fps: 0, width: 0, fcount: 0, _musr: &quot;admin&quot;, vusrId: 1, cmrdr: &quot;&quot;, srvId: 2, oldSrvId: 0, lati: &quot;31.875971894223834&quot;, ftype: 1, _cusr: &quot;admin&quot;, _poid: &quot;542af3e6ed501b43fe57e9e2&quot;, _utime: new Date(1432966583201), _name: &quot;32_20150530141621_269.jpg&quot; } }&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;2015-05-30T16:34:45.922+0800 [repl writer worker 1] Fatal Assertion 16360&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;2015-05-30T16:34:45.922+0800 [repl writer worker 1] &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;&amp;nbsp;&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;***aborting after fassert() failure&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;


&lt;p&gt;after 30 minutes, a secondary power loss, then restart, we find logs :&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;2015-05-30T16:19:49.538+0800 [rsBackgroundSync] replSet syncing to: BH-DCMN:8888&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;2015-05-30T16:19:49.539+0800 [rsSync] replSet still syncing, not yet to minValid optime 55695d7d:61&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;2015-05-30T16:19:49.582+0800 [rsBackgroundSync] replset setting syncSourceFeedback to BH-DCMN:8888&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;2015-05-30T16:19:49.640+0800 [repl writer worker 1] omm_spc.vcm_alarm_files  caught assertion addKeysToIndex omm_spc.vcm_alarm_files.$alarm_1_id: ObjectId(&apos;55695d7d498e2fa3545a614f&apos;)&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;2015-05-30T16:19:49.641+0800 [repl writer worker 1] ERROR: writer worker caught exception:  :: caused by :: 10287 insertDocument :: caused by :: 10287 btree: key+recloc already in index on: { ts: Timestamp 1432968573000|97, h: 7186593903883142160, v: 2, op: &quot;i&quot;, ns: &quot;omm_spc.vcm_alarm_files&quot;, o: { _id: ObjectId(&apos;55695d7d498e2fa3545a614f&apos;), imgid: ObjectId(&apos;55695d7d498ef202c3e00044&apos;), alarm: &quot;076f9c44069811e582b578d752971959006024&quot;, dflag: 0 } }&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;2015-05-30T16:19:49.641+0800 [repl writer worker 1] Fatal Assertion 16360&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;2015-05-30T16:19:49.641+0800 [repl writer worker 1] &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;&amp;nbsp;&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;***aborting after fassert() failure&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;finally, we clean up the dbpath of two members, and copy data from the other, this issue resolved.&lt;br/&gt;
However, this process takes three hours, and our business has been cut off, because we have a large amount of data. &lt;br/&gt;
Is there any other way to solve or evade the problem more quickly? &lt;/p&gt;</description>
                <environment></environment>
        <key id="212641">SERVER-19101</key>
            <summary>ERROR: writer worker caught exception:  :: caused by :: 10287 insertDocument :: caused by :: 10287 btree: key+recloc already in index on</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="sam.kleinman">Sam Kleinman</assignee>
                                    <reporter username="rujun">rujun</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 Jun 2015 05:52:42 +0000</created>
                <updated>Thu, 25 Jun 2015 14:02:00 +0000</updated>
                            <resolved>Wed, 24 Jun 2015 19:15:36 +0000</resolved>
                                    <version>2.6.1</version>
                                                    <component>Admin</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="950509" author="samk" created="Thu, 25 Jun 2015 14:02:00 +0000"  >&lt;p&gt;I just want to make it clear that I&apos;m very sorry that you&apos;ve encountered this issue, and I definitely understand it&apos;s severity and impact. Without more information its difficult to determine the exact source of the issue. If you can provide a reproduction script or instructions against the current stale release (i.e. 3.0.x) we can investigate. Issues like this; however, may also be a result of errors at the storage or networking layer are are difficult to isolate without the ability to reproduce the issue and on older versions.&lt;/p&gt;

&lt;p&gt;Using additional replica set members, and re-syncing when you encounter a data validity bug is the correct way to manage issues like this in the future. If you are able to reliably reproduce this error, we&apos;d be more eager to revisit this issue and investigate that further. &lt;/p&gt;

&lt;p&gt;Sorry again that you encountered this issue.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
sam&lt;/p&gt;</comment>
                            <comment id="950405" author="rujun" created="Thu, 25 Jun 2015 12:06:47 +0000"  >&lt;p&gt;Thank you Sam&lt;br/&gt;
is this a bug of mongodb, or is there a plan to solve this problem, Once this problem occurs, it is quite serious&lt;/p&gt;</comment>
                            <comment id="949690" author="samk" created="Wed, 24 Jun 2015 19:15:09 +0000"  >&lt;p&gt;It looks as if this issue is caused by an invalid document in the oplog, which could be caused by the power failure or another issue. In general, the most expedient solution in this case is to &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/resync-replica-set-member/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;resync the member&lt;/a&gt; as soon as you encounter a data validity issue like this. You may also consider increasing the number of replica set members to increase the amount of redundancy and allow the system to remain available during disruptions and maintenance.. &lt;/p&gt;

&lt;p&gt;Additionally, we recommend always running the latest release in your release stable (2.6.10 for 2.6). &lt;/p&gt;

&lt;p&gt;I hope this helps. &lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
sam&lt;/p&gt;</comment>
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