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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-23627] Randomly locking in WiredTiger storage engine</title>
                <link>https://jira.mongodb.org/browse/SERVER-23627</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;last week we have upgraded from mongo 3.0.6 to 3.0.10. And after upgrading server we are getting random locking issues (even for 1 minute).&lt;br/&gt;
In general these queries will take ~70ms, but during that time it start taking 70 seconds (for us its an outage).&lt;br/&gt;
Tried switching primary to other secondary, but still facing the same issue.&lt;/p&gt;


&lt;p&gt;Below are the logs, when it start happening&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;2016-04-09T08:15:02.106+0530 I NETWORK  [conn222315] end connection 10.14.4.20:51763 (287 connections now open)&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;2016-04-09T08:15:02.107+0530 I NETWORK  [initandlisten] connection accepted from 10.14.4.20:51770 #222318 (288 connections now open)&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;2016-04-09T08:15:03.223+0530 I NETWORK  [initandlisten] connection accepted from 10.14.1.108:40449 #222319 (289 connections now open)&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;2016-04-09T08:15:03.223+0530 I NETWORK  [conn222319] end connection 10.14.1.108:40449 (288 connections now open)&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;2016-04-09T08:15:03.223+0530 I NETWORK  [initandlisten] connection accepted from 10.14.1.108:40450 #222320 (289 connections now open)&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;2016-04-09T08:15:03.224+0530 I NETWORK  [initandlisten] connection accepted from 10.14.1.108:40451 #222321 (290 connections now open)&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;2016-04-09T08:15:03.225+0530 I NETWORK  [conn222321] end connection 10.14.1.108:40451 (289 connections now open)&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;2016-04-09T08:15:03.225+0530 I NETWORK  [initandlisten] connection accepted from 10.14.1.108:40452 #222322 (290 connections now open)&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;2016-04-09T08:15:03.232+0530 I NETWORK  [initandlisten] connection accepted from 10.14.1.108:40457 #222323 (291 connections now open)&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;2016-04-09T08:15:03.340+0530 I COMMAND  [conn222323] command roster_production.$cmd command: count { count: &quot;inventories&quot;, query: { current_location.fix_time: { $lte: new Date(1460166903224) }, status: { $in: [ &quot;idle&quot; ] } } } planSummary: COLLSCAN keyUpdates:0 writeConflicts:0 numYields:786 reslen:44 locks:{ Global: { acquireCount: { r: 1574 } }, Database: { acquireCount: { r: 787 } }, Collection: { acquireCount: { r: 787 } } } 107ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-04-09T08:15:03.449+0530 I COMMAND  [conn222323] command roster_production.$cmd command: count { count: &quot;inventories&quot;, query: { current_location.fix_time: { $lte: new Date(1460166903224) }, status: { $in: [ &quot;idle&quot; ] } } } planSummary: COLLSCAN keyUpdates:0 writeConflicts:0 numYields:786 reslen:44 locks:{ Global: { acquireCount: { r: 1574 } }, Database: { acquireCount: { r: 787 } }, Collection: { acquireCount: { r: 787 } } } 107ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-04-09T08:15:03.710+0530 I COMMAND  [conn222323] command roster_production.$cmd command: count { count: &quot;inventories&quot;, query: { current_location.fix_time: { $lte: new Date(1460166903224) }, status: { $in: [ &quot;idle&quot; ] } } } planSummary: COLLSCAN keyUpdates:0 writeConflicts:0 numYields:786 reslen:44 locks:{ Global: { acquireCount: { r: 1574 } }, Database: { acquireCount: { r: 787 } }, Collection: { acquireCount: { r: 787 } } } 107ms&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;2016-04-09T08:15:06.767+0530 I NETWORK  [initandlisten] connection accepted from 127.0.0.1:50024 #222324 (292 connections now open)&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;2016-04-09T08:15:13.233+0530 I NETWORK  [conn222320] end connection 10.14.1.108:40450 (291 connections now open)&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;2016-04-09T08:15:14.758+0530 I NETWORK  [conn222317] end connection 10.14.1.207:46537 (290 connections now open)&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;2016-04-09T08:15:14.758+0530 I NETWORK  [initandlisten] connection accepted from 10.14.1.207:46545 #222325 (291 connections now open)&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;2016-04-09T08:15:23.438+0530 I COMMAND  [conn222184] command local.$cmd command: dbStats { dbStats: 1 } keyUpdates:0 writeConflicts:0 numYields:0 reslen:188 locks:{ Global: { acquireCount: { r: 2 } }, Database: { acquireCount: { R: 1 }, acquireWaitCount: { R: 1 }, timeAcquiringMicros: { R: 76628917 } } } 76629ms&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;2016-04-09T08:15:23.438+0530 I WRITE    [conn222239] update roster_production.inventories query: { _id: ObjectId(&apos;56c6b540af1df3a27122eae6&apos;) } update: { $set: { last_request_device_time: new Date(1460169847843), updated_at: new Date(1460169847848), current_location._id: ObjectId(&apos;57086c773b6f82232e000000&apos;) } } nscanned:1 nscannedObjects:1 nMatched:1 nModified:1 keyUpdates:1 writeConflicts:0 numYields:1 locks:{ Global: { acquireCount: { r: 3, w: 3 } }, Database: { acquireCount: { w: 3 }, acquireWaitCount: { w: 1 }, timeAcquiringMicros: { w: 75590590 } }, Collection: { acquireCount: { w: 2 } }, oplog: { acquireCount: { w: 1 } } } 75590ms&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;2016-04-09T08:15:23.438+0530 I WRITE    [conn222296] update roster_production.inventories query: { _id: ObjectId(&apos;56a3181aaf1df3a27122c482&apos;) } update: { $set: { last_request_device_time: new Date(1460169848325), updated_at: new Date(1460169848330), current_location._id: ObjectId(&apos;57086c78706d2756aa000000&apos;) } } nscanned:1 nscannedObjects:1 nMatched:1 nModified:1 keyUpdates:1 writeConflicts:0 numYields:1 locks:{ Global: { acquireCount: { r: 3, w: 3 } }, Database: { acquireCount: { w: 3 }, acquireWaitCount: { w: 1 }, timeAcquiringMicros: { w: 75106091 } }, Collection: { acquireCount: { w: 2 } }, oplog: { acquireCount: { w: 1 } } } 75106ms&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;2016-04-09T08:15:23.438+0530 I NETWORK  [conn222184] end connection 127.0.0.1:50008 (290 connections now open)&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;2016-04-09T08:15:23.438+0530 I WRITE    [conn222231] insert roster_production.legs query: { _id: ObjectId(&apos;57086c78706d27547b000004&apos;), session_id: ObjectId(&apos;5708621d706d272159000850&apos;), engaged_by: 114135077, coverage: 1471870, wait_time: 686.0, request_time: new Date(1460169847000), lazy: false, source: &quot;fixed&quot;, previous_status: &quot;idle&quot;, current_status: &quot;engaged&quot;, next_status: &quot;idle&quot;, inventory_id: ObjectId(&apos;56cedb47af1df3a27122ef0d&apos;), updated_at: new Date(1460169848132), created_at: new Date(1460169848132), start: { _id: ObjectId(&apos;57086c78706d27547b000002&apos;), time: new Date(1460168370000), location: { _id: ObjectId(&apos;57086c78706d27547b000005&apos;), alt: null, accuracy: 20.0, fix_time: new Date(1460168367000), provider: &quot;fused&quot;, bearing: 197.0 } }, end: { _id: ObjectId(&apos;57086c78706d27547b000003&apos;), time: new Date(1460169846000), location: { _id: ObjectId(&apos;57086c78706d27547b000006&apos;), alt: null, accuracy: 20.0, fix_time: new Date(1460169842000), altitude: 570.4, provider: &quot;fused&quot;, bearing: 1.0 } } } ninserted:1 keyUpdates:0 writeConflicts:0 numYields:0 locks:{ Global: { acquireCount: { r: 2, w: 2 } }, Database: { acquireCount: { w: 2 }, acquireWaitCount: { w: 1 }, timeAcquiringMicros: { w: 75305189 } }, Collection: { acquireCount: { w: 1 } }, oplog: { acquireCount: { w: 1 } } } 75305ms&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;Getting Lots of queries like above one.&lt;/p&gt;
</description>
                <environment>production</environment>
        <key id="278630">SERVER-23627</key>
            <summary>Randomly locking in WiredTiger storage engine</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="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="rakesh.mib.j@gmail.com">Rakesh Kumar</reporter>
                        <labels>
                            <label>query</label>
                            <label>replicaset</label>
                    </labels>
                <created>Sat, 9 Apr 2016 16:50:52 +0000</created>
                <updated>Tue, 16 Nov 2021 17:19:22 +0000</updated>
                            <resolved>Mon, 18 Apr 2016 15:32:39 +0000</resolved>
                                    <version>3.0.10</version>
                                                    <component>Performance</component>
                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1238760" author="ramon.fernandez" created="Mon, 18 Apr 2016 15:32:39 +0000"  >&lt;p&gt;Thanks for the update &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rakesh.mib.j&quot; class=&quot;user-hover&quot; rel=&quot;rakesh.mib.j&quot;&gt;rakesh.mib.j&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1237998" author="rakesh.mib.j@gmail.com" created="Sun, 17 Apr 2016 06:54:25 +0000"  >&lt;p&gt;Thanks, But we got the exact issue after a long discussion with AWS.&lt;br/&gt;
There is an issue with EBS volume at AWS end, due to that disk is not available for some duration and during that duration we face this issue.&lt;br/&gt;
Please close the ticket and sorry for the delayed response.&lt;/p&gt;</comment>
                            <comment id="1231627" author="ramon.fernandez" created="Mon, 11 Apr 2016 09:22:59 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rakesh.mib.j&quot; class=&quot;user-hover&quot; rel=&quot;rakesh.mib.j&quot;&gt;rakesh.mib.j&lt;/a&gt;, I&apos;ve created a &lt;a href=&quot;https://10gen-httpsupload.s3.amazonaws.com/upload_forms/3ca052e9-dcbe-4375-9a43-77e29e2fc8de.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;private upload portal&lt;/a&gt; so you can share with us privately and securely the information requested by Alexander above.&lt;/p&gt;</comment>
                            <comment id="1231414" author="alexander.gorrod" created="Sun, 10 Apr 2016 23:48:17 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rakesh.kumar&quot; class=&quot;user-hover&quot; rel=&quot;rakesh.kumar&quot;&gt;rakesh.kumar&lt;/a&gt; It would be useful if you can gather:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;iostat and cpustat output for a time period that spans operations stalls.&lt;/li&gt;
	&lt;li&gt;level 1 mongod log&lt;/li&gt;
	&lt;li&gt;Periodic serverStatus output at 1-second intervals for a time period that spans operations stalls. You can do that by running the following command:&lt;/li&gt;
&lt;/ul&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;   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;  mongo --eval &quot;while(true) {print(JSON.stringify(db.serverStatus())); sleep(1000)}&quot; &amp;gt;ss.log &amp;amp;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;It would also be very valuable to know whether the same issue occurs on the latest stable release of MongoDB which is 3.2.4.&lt;/p&gt;</comment>
                            <comment id="1231349" author="rakesh.mib.j@gmail.com" created="Sun, 10 Apr 2016 16:50:11 +0000"  >&lt;p&gt;@Dan Pasette : Please let me know what information you need at my end, We are using mms monitoring for these servers. I can provide the same (In private ticket, which can&apos;t be seen in public) if needed.&lt;/p&gt;

&lt;p&gt;Server Hardware (EC2 Instance Type) : c4.4xlarge, with 500Gb gp2 EBS volume.&lt;br/&gt;
Below are mongo server configuration, which we use in mongod.conf (as in all nodes, replicaset cluster). &lt;/p&gt;

&lt;p&gt;oplogSize=40000&lt;br/&gt;
replSet=PordCluster&lt;br/&gt;
storageEngine=wiredTiger&lt;br/&gt;
wiredTigerCollectionBlockCompressor=none&lt;br/&gt;
wiredTigerIndexPrefixCompression=false&lt;/p&gt;

&lt;p&gt;Further we are facing issue in mongo 3.0.10 (after upgrading from 3.0.6) and after some time (after locking release) things become normal (no performance degradation).&lt;br/&gt;
And we are doing lots of bulk updates in this cluster, with a batch size of 100.&lt;/p&gt;

&lt;p&gt;Please let me know if you need any other details to debug this issue.&lt;/p&gt;</comment>
                            <comment id="1231345" author="dan@10gen.com" created="Sun, 10 Apr 2016 16:18:43 +0000"  >&lt;p&gt;Hi Rakesh, we don&apos;t have enough information to say for sure, but the log messages you&apos;ve provided are consistent with symptoms reported in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21782&quot; title=&quot;WiredTiger freezing at 100% cache in use until service restart (daily)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21782&quot;&gt;&lt;del&gt;SERVER-21782&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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