<!-- 
RSS generated by JIRA (9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66) at Thu Feb 08 04:02:21 UTC 2024

It is possible to restrict the fields that are returned in this document by specifying the 'field' parameter in your request.
For example, to request only the issue key and summary append 'field=key&field=summary' to the URL of your request.
-->
<rss version="0.92" >
<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-23097] Segfault on drop of source collection during MapReduce</title>
                <link>https://jira.mongodb.org/browse/SERVER-23097</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Mongod process seems to sporadically causing segment errors while running mongo aggregation framework or/and right after completing the aggregation pipeline, most notably during dropping temp collections created as part of the aggregation framework.  &lt;/p&gt;

&lt;p&gt;We run aggregation on multiple keys on a collection,  we need unique counts for each of the field values, several aggregation pipelines are run in parallel and target collections are dropped after reading the results and writing the outputs to a unified collection [ done via map-reduce framework]. &lt;/p&gt;

&lt;p&gt;The errors seem to be happening quite frequently - in dev and qa. &lt;/p&gt;

&lt;p&gt;Platform specs : Mongo Db version 3.2.1&lt;br/&gt;
Storage Engine: WiredTiger&lt;br/&gt;
OS :Linux version 3.13.0-74-generic (buildd@lcy01-07) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) )&lt;/p&gt;</description>
                <environment></environment>
        <key id="271913">SERVER-23097</key>
            <summary>Segfault on drop of source collection during MapReduce</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="james.wahlin@mongodb.com">James Wahlin</assignee>
                                    <reporter username="ppeddada">pavan</reporter>
                        <labels>
                            <label>code-only</label>
                    </labels>
                <created>Fri, 11 Mar 2016 20:45:37 +0000</created>
                <updated>Sat, 19 Nov 2016 20:25:51 +0000</updated>
                            <resolved>Wed, 23 Mar 2016 19:35:35 +0000</resolved>
                                    <version>3.2.4</version>
                    <version>3.3.3</version>
                                    <fixVersion>3.2.5</fixVersion>
                    <fixVersion>3.3.4</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1221972" author="ppeddada" created="Fri, 1 Apr 2016 00:00:57 +0000"  >&lt;p&gt;The slowness reported during map-reduce operations is part of an open issue which can be close as of now.  &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23456&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-23456&lt;/a&gt; &lt;/p&gt;

&lt;p&gt;Apparently map-reduce owns a global lock in contrast to collection lock design paradigm - new in 3.2 . By passing/setting nonAtomic  flag to true on map-reduce jobs frees up the db for other queries, Is there any reason why map-reduce require global lock on a database ?. Lock to Oplog/local collection makes sense, just not sure why Map-reduce needs global lock when operations are on non interfering collections within the database.&lt;/p&gt;</comment>
                            <comment id="1221664" author="ppeddada" created="Thu, 31 Mar 2016 19:48:10 +0000"  >&lt;p&gt;some new observation that we like share, when running heavy map-reduce jobs,mongo seems  to respond very slowly to queries, the server is on a 4 core box, 1 core is fully owned by the map-reduce, the map-reduce logic is totally operating off of different collection - temps collections, data from temp collection is being merged into a different collection.  Mongo queries being requested are totally isolated from the map-reduce space, even then mongo seems to be , intermittently - quite visible on front end node app, where data/query ( reads) take a while to comeback , in our case  up to 16 seconds.   In the below trace its on &lt;/p&gt;

&lt;p&gt;&apos;&lt;span class=&quot;error&quot;&gt;&amp;#91;conn5599&amp;#93;&lt;/span&gt; command dim3.scans command: count&apos;&lt;/p&gt;


&lt;p&gt;2016-03-31T12:45:25.851-0700 I COMMAND  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5720&amp;#93;&lt;/span&gt; command dim3.domainstats command: mapReduce { mapreduce: &quot;whois.billing_stateprovince_56cc44bbf2e5301119d51e37s&quot;, map: &quot;function () {&lt;/p&gt;

&lt;p&gt;    var key = this._id;&lt;br/&gt;
    var value=&lt;/p&gt;
{&apos;colors&apos;:this.colors}
&lt;p&gt;;&lt;br/&gt;
    if(value.colors){&lt;br/&gt;
     //coming from aggregate collections&lt;br/&gt;
        va...&quot;, reduce: &quot;function (key, values) {&lt;/p&gt;

&lt;p&gt;    //printjson(values)&lt;br/&gt;
    var reduce ={colors:{whois:{}}};&lt;br/&gt;
    values.forEach(function(value){&lt;br/&gt;
        var properties = Ob...&quot;, verbose: true, out: &lt;/p&gt;
{ reduce: &quot;domainstats&quot; }
&lt;p&gt;, jsMode: true, sort: &lt;/p&gt;
{ _id: 1 }
&lt;p&gt;, readPreference: &quot;primary&quot; } planSummary: COUNT keyUpdates:0 writeConflicts:0 numYields:961 reslen:218 locks:{ Global: { acquireCount: &lt;/p&gt;
{ r: 432022, w: 245061, W: 61263 }
&lt;p&gt; }, Database: { acquireCount: &lt;/p&gt;
{ r: 61752, w: 245055, R: 1097, W: 8 }
&lt;p&gt;, acquireWaitCount: &lt;/p&gt;
{ W: 4 }
&lt;p&gt;, timeAcquiringMicros: &lt;/p&gt;
{ W: 66963 }
&lt;p&gt; }, Collection: { acquireCount: &lt;/p&gt;
{ r: 61752, w: 122530 }
&lt;p&gt; }, Metadata: { acquireCount: &lt;/p&gt;
{ w: 122527 }
&lt;p&gt; }, oplog: { acquireCount: &lt;/p&gt;
{ w: 122527 }
&lt;p&gt; } } protocol:op_query 31020ms&lt;br/&gt;
2016-03-31T12:45:25.880-0700 I COMMAND  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5599&amp;#93;&lt;/span&gt; command dim3.scans command: count { count: &quot;scans&quot;, query: { $and: [ &lt;/p&gt;
{ scan_status: &quot;Filter Domains&quot; }
&lt;p&gt; ], brand_id: &lt;/p&gt;
{ $in: [ ObjectId(&apos;56cd9f5898fd55053830554d&apos;), ObjectId(&apos;56cea82d8a0e5d7952142b5e&apos;), ObjectId(&apos;56cea94366e6e6a354584d97&apos;), ObjectId(&apos;56d5e2203c6909fb46e08883&apos;), ObjectId(&apos;56e122cc2d661b6302c47ced&apos;), ObjectId(&apos;56e1233f2d661b6302c47cf2&apos;), ObjectId(&apos;56e1239b2d661b6302c47cf3&apos;), ObjectId(&apos;56e124142d661b6302c47cf4&apos;), ObjectId(&apos;56e13eca2d661b6302c47d0d&apos;), ObjectId(&apos;56e13f182d661b6302c47d13&apos;), ObjectId(&apos;56e167562d661b6302c47d45&apos;), ObjectId(&apos;56e167a02d661b6302c47d46&apos;), ObjectId(&apos;56e167ba2d661b6302c47d47&apos;), ObjectId(&apos;56e7b8fc0ae6fbaa5e3907a2&apos;), ObjectId(&apos;56f3b357b168e8630b701bf5&apos;), ObjectId(&apos;56fabd55a0949280749497bb&apos;) ] }
&lt;p&gt; } } planSummary: IXSCAN &lt;/p&gt;
{ scan_status: 1.0 }
&lt;p&gt; keyUpdates:0 writeConflicts:0 numYields:5 reslen:62 locks:{ Global: { acquireCount: &lt;/p&gt;
{ r: 12 }
&lt;p&gt;, acquireWaitCount: &lt;/p&gt;
{ r: 1 }
&lt;p&gt;, timeAcquiringMicros: &lt;/p&gt;
{ r: 16598608 }
&lt;p&gt; }, Database: { acquireCount: &lt;/p&gt;
{ r: 6 }
&lt;p&gt;, acquireWaitCount: &lt;/p&gt;
{ r: 4 }
&lt;p&gt;, timeAcquiringMicros: &lt;/p&gt;
{ r: 18213 }
&lt;p&gt; }, Collection: { acquireCount: &lt;/p&gt;
{ r: 6 }
&lt;p&gt; } } protocol:op_query 16707ms&lt;br/&gt;
2016-03-31T12:45:25.903-0700 I COMMAND  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5600&amp;#93;&lt;/span&gt; command dim3.scans command: count { count: &quot;scans&quot;, query: { brand_id: &lt;/p&gt;
{ $in: [ ObjectId(&apos;56cd9f5898fd55053830554d&apos;), ObjectId(&apos;56cea82d8a0e5d7952142b5e&apos;), ObjectId(&apos;56cea94366e6e6a354584d97&apos;), ObjectId(&apos;56d5e2203c6909fb46e08883&apos;), ObjectId(&apos;56e122cc2d661b6302c47ced&apos;), ObjectId(&apos;56e1233f2d661b6302c47cf2&apos;), ObjectId(&apos;56e1239b2d661b6302c47cf3&apos;), ObjectId(&apos;56e124142d661b6302c47cf4&apos;), ObjectId(&apos;56e13eca2d661b6302c47d0d&apos;), ObjectId(&apos;56e13f182d661b6302c47d13&apos;), ObjectId(&apos;56e167562d661b6302c47d45&apos;), ObjectId(&apos;56e167a02d661b6302c47d46&apos;), ObjectId(&apos;56e167ba2d661b6302c47d47&apos;), ObjectId(&apos;56e7b8fc0ae6fbaa5e3907a2&apos;), ObjectId(&apos;56f3b357b168e8630b701bf5&apos;), ObjectId(&apos;56fabd55a0949280749497bb&apos;) ] }
&lt;p&gt; } } planSummary: COLLSCAN keyUpdates:0 writeConflicts:0 numYields:7 reslen:62 locks:{ Global: { acquireCount: &lt;/p&gt;
{ r: 16 }
&lt;p&gt;, acquireWaitCount: &lt;/p&gt;
{ r: 1 }
&lt;p&gt;, timeAcquiringMicros: &lt;/p&gt;
{ r: 15101649 }
&lt;p&gt; }, Database: { acquireCount: &lt;/p&gt;
{ r: 8 }
&lt;p&gt;, acquireWaitCount: &lt;/p&gt;
{ r: 4 }
&lt;p&gt;, timeAcquiringMicros: &lt;/p&gt;
{ r: 22334 }
&lt;p&gt; }, Collection: { acquireCount: &lt;/p&gt;
{ r: 8 }
&lt;p&gt; } } protocol:op_query 15232ms&lt;br/&gt;
2016-03-31T12:45:25.918-0700 I COMMAND  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt; CMD: drop dim3.tmp.mr.whois.registrar_56cc44bbf2e5301119d51e37s_3850&lt;br/&gt;
2016-03-31T12:45:26.060-0700 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; connection accepted from 172.31.32.189:37107 #5824 (358 connections now open)&lt;br/&gt;
2016-03-31T12:45:28.005-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R: (1/3) Emit Progress: 54900/61061 89%&lt;br/&gt;
2016-03-31T12:45:31.006-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R: (3/3) Final Reduce Progress: 56600/61061 92%&lt;br/&gt;
2016-03-31T12:45:34.016-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 6400/61061 10%&lt;br/&gt;
2016-03-31T12:45:37.016-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 13300/61061 21%&lt;br/&gt;
2016-03-31T12:45:40.040-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 20200/61061 33%&lt;br/&gt;
2016-03-31T12:45:41.222-0700 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; connection accepted from 172.31.32.189:37108 #5825 (359 connections now open)&lt;br/&gt;
2016-03-31T12:45:41.224-0700 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5823&amp;#93;&lt;/span&gt; end connection 172.31.32.189:37106 (358 connections now open)&lt;br/&gt;
2016-03-31T12:45:43.039-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 27000/61061 44%&lt;br/&gt;
2016-03-31T12:45:46.021-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 33700/61061 55%&lt;br/&gt;
2016-03-31T12:45:49.030-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 40700/61061 66%&lt;br/&gt;
2016-03-31T12:45:52.013-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 47500/61061 77%&lt;br/&gt;
2016-03-31T12:45:55.039-0700 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt;   M/R Reduce Post Processing Progress: 54400/61061 89%&lt;br/&gt;
2016-03-31T12:45:58.000-0700 I COMMAND  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5722&amp;#93;&lt;/span&gt; CMD: drop dim3.tmp.mr.whois.registrar_56cc44bbf2e5301119d51e37s_3850&lt;br/&gt;
2016-03-31T12:45:58.001-0700 I COMMAND  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5824&amp;#93;&lt;/span&gt; command local.oplog.rs command: getMore { getMore: 117817015601, collection: &quot;oplog.rs&quot;, maxTimeMS: 5000, term: 17, lastKnownCommittedOpTime: &lt;/p&gt;
{ ts: Timestamp 1459453531000|4444, t: 17 }
&lt;p&gt; } cursorid:117817015601 keyUpdates:0 writeConflicts:0 exception: operation exceeded time limit code:50 numYields:0 reslen:74 locks:{ Global: { acquireCount: &lt;/p&gt;
{ r: 2 }
&lt;p&gt;, acquireWaitCount: &lt;/p&gt;
{ r: 1 }
&lt;p&gt;, timeAcquiringMicros: &lt;/p&gt;
{ r: 26779529 }
&lt;p&gt; }, Database: { acquireCount: &lt;/p&gt;
{ r: 1 }
&lt;p&gt; }, oplog: { acquireCount: &lt;/p&gt;
{ r: 1 }
&lt;p&gt; } } protocol:op_command 26779ms&lt;br/&gt;
2016-03-31T12:45:58.002-0700 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5824&amp;#93;&lt;/span&gt; end connection 172.31.32.189:37107 (357 connections now open)&lt;br/&gt;
2016-03-31T12:45:58.002-0700 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;conn5825&amp;#93;&lt;/span&gt; end connection 172.31.32.189:37108 (356 connections now open)&lt;/p&gt;</comment>
                            <comment id="1213205" author="xgen-internal-githook" created="Wed, 23 Mar 2016 22:09:26 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23097&quot; title=&quot;Segfault on drop of source collection during MapReduce&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23097&quot;&gt;&lt;del&gt;SERVER-23097&lt;/del&gt;&lt;/a&gt; fixed lint in MapReduce&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7bd2ffaaadae400efc05d642d43436210aa835b3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7bd2ffaaadae400efc05d642d43436210aa835b3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1212983" author="xgen-internal-githook" created="Wed, 23 Mar 2016 19:29:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jameswahlin&apos;, u&apos;name&apos;: u&apos;James Wahlin&apos;, u&apos;email&apos;: u&apos;james.wahlin@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23097&quot; title=&quot;Segfault on drop of source collection during MapReduce&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23097&quot;&gt;&lt;del&gt;SERVER-23097&lt;/del&gt;&lt;/a&gt; Fix segfault on invalid BSONObj reference in MapReduce&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bcac0c80bcf1e4c6b7a55e165f9d08336338068d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bcac0c80bcf1e4c6b7a55e165f9d08336338068d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1212911" author="xgen-internal-githook" created="Wed, 23 Mar 2016 18:51:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jameswahlin&apos;, u&apos;name&apos;: u&apos;James Wahlin&apos;, u&apos;email&apos;: u&apos;james.wahlin@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23097&quot; title=&quot;Segfault on drop of source collection during MapReduce&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23097&quot;&gt;&lt;del&gt;SERVER-23097&lt;/del&gt;&lt;/a&gt; Improve killed executor handling in MapReduce&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 200b4f971b021f792194489c8ffbc95b9f9cba35)&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/20bafb68ae90b11883258d25a2c380843d01a1d7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/20bafb68ae90b11883258d25a2c380843d01a1d7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1212910" author="xgen-internal-githook" created="Wed, 23 Mar 2016 18:51:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jameswahlin&apos;, u&apos;name&apos;: u&apos;James Wahlin&apos;, u&apos;email&apos;: u&apos;james.wahlin@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23097&quot; title=&quot;Segfault on drop of source collection during MapReduce&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23097&quot;&gt;&lt;del&gt;SERVER-23097&lt;/del&gt;&lt;/a&gt; Handle PlanExecutor error in MapReduce&lt;/p&gt;

&lt;p&gt;(selective cherry pick of mr.cpp changes from commit&lt;br/&gt;
a12f3f807900829a36f97dc777f98bebe74ad591)&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/03f73c9d8f3b593b2bb3b6abf6135cde78163b99&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/03f73c9d8f3b593b2bb3b6abf6135cde78163b99&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1212505" author="james.wahlin@10gen.com" created="Wed, 23 Mar 2016 15:12:32 +0000"  >&lt;p&gt;Reopening to address concurrency suite test failure.&lt;/p&gt;</comment>
                            <comment id="1210171" author="xgen-internal-githook" created="Mon, 21 Mar 2016 20:24:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jameswahlin&apos;, u&apos;name&apos;: u&apos;James Wahlin&apos;, u&apos;email&apos;: u&apos;james.wahlin@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23097&quot; title=&quot;Segfault on drop of source collection during MapReduce&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23097&quot;&gt;&lt;del&gt;SERVER-23097&lt;/del&gt;&lt;/a&gt; Improve killed executor handling in MapReduce&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/200b4f971b021f792194489c8ffbc95b9f9cba35&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/200b4f971b021f792194489c8ffbc95b9f9cba35&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1204382" author="james.wahlin@10gen.com" created="Tue, 15 Mar 2016 19:48:11 +0000"  >&lt;p&gt;Thanks Pavan! We believe we understand where the issues lies (our 3.2 MapReduce code is not handling collection drop adequately) but having this information may help confirm. We will proceed with our patch either way and will supplement if needed.&lt;/p&gt;</comment>
                            <comment id="1204378" author="ppeddada" created="Tue, 15 Mar 2016 19:43:54 +0000"  >&lt;p&gt;Hello  James, increased the log level to 2 on dev/qa/prod. I tried to simulate the tests on my mac - doing concurrent operations on the collection that has the aggregation logic - bulk inserts and fetches, same time ran aggregation, no errors so far. On Mac it was 2 node replicate set. The log is enabled now, will share the logs  and crash report as soon as we see the issue again - Thx.&lt;/p&gt;</comment>
                            <comment id="1202898" author="james.wahlin@10gen.com" created="Mon, 14 Mar 2016 19:48:34 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ppeddada&quot; class=&quot;user-hover&quot; rel=&quot;ppeddada&quot;&gt;ppeddada&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for sharing details on how your application is triggering this. I will be working to investigate this issue and will update once I have information to share. &lt;/p&gt;

&lt;p&gt;If possible, can you increase the logging level to 2 on your primary and trigger this issue? Log level 2 will write operations to the log file before execution and will provide details on the operation that is triggering the segmentation fault. If you can provide, please attach the log output to this ticket, including the crash and the preceding operation for the given connection (so for your example above, the preceding operation would contain &quot;[conn1601]&quot;.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
James&lt;/p&gt;</comment>
                            <comment id="1202835" author="ppeddada" created="Mon, 14 Mar 2016 19:11:28 +0000"  >&lt;p&gt;We had this error again in our QA environment today, pretty consistent whenever aggregation pipeline is run.  The cluster/replica set is a 3 node system.  We drop aggregation collections right after the pipeline execution, not sure if oplog/sync process between nodes has problems on visibility of  collections  dropped - like trying to access a dropped collection ???.  Something to note on this specific use case.  The Node layer launches the aggregation command and  on completion drops the output collections.&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;2016-03-14T02:22:52.081-0700 I COMMAND  [conn1703] command dim3.domains command: aggregate { aggregate: &quot;domains&quot;, pipeline: [ { $match: { scan_id: ObjectId(&apos;56e37ec5f2867caf306845d0&apos;) } }, { $group: { _id: { admin_organization: &quot;$whois.admin_organization&quot; }, count: { $sum: 1 }, keys: { $push: &quot;$_id&quot; }, scan_id: { $first: &quot;$scan_id&quot; } } }, { $match: { count: { $gt: 1 } } }, { $project: { _id: 0, keys: &quot;$keys&quot;, scan_id: &quot;$scan_id&quot;, colors: { whois: { admin_organization: { value: &quot;$_id.admin_organization&quot;, count: &quot;$count&quot; } } } } }, { $unwind: &quot;$keys&quot; }, { $project: { _id: &quot;$keys&quot;, scan_id: &quot;$scan_id&quot;, colors: &quot;$colors&quot; } }, { $sort: { _id: 1 } }, { $out: &quot;whois.admin_organization_56e37ec5f2867caf306845d0s&quot; } ], allowDiskUse: true } keyUpdates:0 writeConflicts:0 numYields:1 reslen:68 locks:{ Global: { acquireCount: { r: 23, w: 8, W: 1 }, acquireWaitCount: { r: 2, w: 1, W: 1 }, timeAcquiringMicros: { r: 181655, w: 108645, W: 121857 } }, Database: { acquireCount: { r: 6, w: 6, R: 1, W: 2 }, acquireWaitCount: { r: 4, R: 1, W: 2 }, timeAcquiringMicros: { r: 106549, R: 43136, W: 175094 } }, Collection: { acquireCount: { r: 6, w: 1 } }, Metadata: { acquireCount: { w: 102 } }, oplog: { acquireCount: { w: 5 } } } protocol:op_query 777ms&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;2016-03-14T02:22:52.081-0700 I COMMAND  [conn1728] command dim3.domains command: aggregate { aggregate: &quot;domains&quot;, pipeline: [ { $match: { scan_id: ObjectId(&apos;56e37ec5f2867caf306845d0&apos;) } }, { $group: { _id: { created_date: &quot;$whois.created_date&quot; }, count: { $sum: 1 }, keys: { $push: &quot;$_id&quot; }, scan_id: { $first: &quot;$scan_id&quot; } } }, { $match: { count: { $gt: 1 } } }, { $project: { _id: 0, keys: &quot;$keys&quot;, scan_id: &quot;$scan_id&quot;, colors: { whois: { created_date: { value: &quot;$_id.created_date&quot;, count: &quot;$count&quot; } } } } }, { $unwind: &quot;$keys&quot; }, { $project: { _id: &quot;$keys&quot;, scan_id: &quot;$scan_id&quot;, colors: &quot;$colors&quot; } }, { $sort: { _id: 1 } }, { $out: &quot;whois.created_date_56e37ec5f2867caf306845d0s&quot; } ], allowDiskUse: true } keyUpdates:0 writeConflicts:0 numYields:1 reslen:68 locks:{ Global: { acquireCount: { r: 23, w: 8, W: 1 }, acquireWaitCount: { r: 2, w: 1, W: 1 }, timeAcquiringMicros: { r: 141075, w: 108388, W: 158985 } }, Database: { acquireCount: { r: 6, w: 6, R: 1, W: 2 }, acquireWaitCount: { r: 4, R: 1, W: 2 }, timeAcquiringMicros: { r: 71893, R: 37179, W: 217667 } }, Collection: { acquireCount: { r: 6, w: 1 } }, Metadata: { acquireCount: { w: 100 } }, oplog: { acquireCount: { w: 5 } } } protocol:op_query 767ms&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;2016-03-14T02:22:52.081-0700 I COMMAND  [conn1721] command dim3.domains command: aggregate { aggregate: &quot;domains&quot;, pipeline: [ { $match: { scan_id: ObjectId(&apos;56e37ec5f2867caf306845d0&apos;) } }, { $group: { _id: { billing_fax: &quot;$whois.billing_fax&quot; }, count: { $sum: 1 }, keys: { $push: &quot;$_id&quot; }, scan_id: { $first: &quot;$scan_id&quot; } } }, { $match: { count: { $gt: 1 } } }, { $project: { _id: 0, keys: &quot;$keys&quot;, scan_id: &quot;$scan_id&quot;, colors: { whois: { billing_fax: { value: &quot;$_id.billing_fax&quot;, count: &quot;$count&quot; } } } } }, { $unwind: &quot;$keys&quot; }, { $project: { _id: &quot;$keys&quot;, scan_id: &quot;$scan_id&quot;, colors: &quot;$colors&quot; } }, { $sort: { _id: 1 } }, { $out: &quot;whois.billing_fax_56e37ec5f2867caf306845d0s&quot; } ], allowDiskUse: true } keyUpdates:0 writeConflicts:0 numYields:1 reslen:68 locks:{ Global: { acquireCount: { r: 23, w: 8, W: 1 }, acquireWaitCount: { r: 2, w: 1, W: 1 }, timeAcquiringMicros: { r: 203895, w: 109771, W: 98989 } }, Database: { acquireCount: { r: 6, w: 6, R: 1, W: 2 }, acquireWaitCount: { r: 4, R: 1, W: 2 }, timeAcquiringMicros: { r: 64782, R: 52577, W: 215537 } }, Collection: { acquireCount: { r: 6, w: 1 } }, Metadata: { acquireCount: { w: 104 } }, oplog: { acquireCount: { w: 5 } } } protocol:op_query 770ms&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;2016-03-14T02:22:52.081-0700 F -        [conn1601] Invalid access at address: 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;2016-03-14T02:22:52.082-0700 I COMMAND  [conn1921] command local.oplog.rs command: getMore { getMore: 787104288244, collection: &quot;oplog.rs&quot;, maxTimeMS: 5000, term: 9, lastKnownCommittedOpTime: { ts: Timestamp 1457947371000|556, t: 9 } } cursorid:787104288244 keyUpdates:0 writeConflicts:0 numYields:16 nreturned:2107 reslen:422173 locks:{ Global: { acquireCount: { r: 34 }, acquireWaitCount: { r: 3 }, timeAcquiringMicros: { r: 420899 } }, Database: { acquireCount: { r: 17 } }, oplog: { acquireCount: { r: 17 } } } protocol:op_command 426ms&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;2016-03-14T02:22:52.082-0700 I COMMAND  [conn1885] command local.oplog.rs command: getMore { getMore: 790194289981, collection: &quot;oplog.rs&quot;, maxTimeMS: 5000, term: 9, lastKnownCommittedOpTime: { ts: Timestamp 1457947371000|556, t: 9 } } cursorid:790194289981 keyUpdates:0 writeConflicts:0 numYields:13 nreturned:1739 reslen:347305 locks:{ Global: { acquireCount: { r: 28 }, acquireWaitCount: { r: 3 }, timeAcquiringMicros: { r: 418458 } }, Database: { acquireCount: { r: 14 } }, oplog: { acquireCount: { r: 14 } } } protocol:op_command 427ms&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;2016-03-14T02:22:52.089-0700 F -        [conn1601] Got signal: 11 (Segmentation fault).&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="1201190" author="charlie.swanson" created="Fri, 11 Mar 2016 21:12:43 +0000"  >&lt;p&gt;Backtrace from the 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;2016-03-11T18:56:00.944+0000 F -        [conn29677] Got signal: 11 (Segmentation fault).&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;   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; 0x12f14b2 0x12f0609 0x12f0988 0x7f074e3b4340 0xafd0de 0xaccda8 0xb495c5 0xba5449 0xba6106 0xb02330 0xcaf525 0xcb1db6 0x9968cc 0x129ee6d 0x7f074e3ac182 0x7f074e0d947d&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;----- BEGIN BACKTRACE -----&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;{&quot;backtrace&quot;:[{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;EF14B2&quot;,&quot;s&quot;:&quot;_ZN5mongo15printStackTraceERSo&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;EF0609&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;EF0988&quot;},{&quot;b&quot;:&quot;7F074E3A4000&quot;,&quot;o&quot;:&quot;10340&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;6FD0DE&quot;,&quot;s&quot;:&quot;_ZN5mongo27CollectionIndexUsageTracker17recordIndexAccessENS_10StringDataE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;6CCDA8&quot;,&quot;s&quot;:&quot;_ZN5mongo19CollectionInfoCache13notifyOfQueryEPNS_16OperationContextERKSt3setISsSt4lessISsESaISsEE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;7495C5&quot;,&quot;s&quot;:&quot;_ZN5mongo2mr16MapReduceCommand3runEPNS_16OperationContextERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;7A5449&quot;,&quot;s&quot;:&quot;_ZN5mongo7Command3runEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS3_21ReplyBuilderInterfaceE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;7A6106&quot;,&quot;s&quot;:&quot;_ZN5mongo7Command11execCommandEPNS_16OperationContextEPS0_RKNS_3rpc16RequestInterfaceEPNS4_21ReplyBuilderInterfaceE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;702330&quot;,&quot;s&quot;:&quot;_ZN5mongo11runCommandsEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS2_21ReplyBuilderInterfaceE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;8AF525&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;8B1DB6&quot;,&quot;s&quot;:&quot;_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;5968CC&quot;,&quot;s&quot;:&quot;_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;E9EE6D&quot;,&quot;s&quot;:&quot;_ZN5mongo17PortMessageServer17handleIncomingMsgEPv&quot;},{&quot;b&quot;:&quot;7F074E3A4000&quot;,&quot;o&quot;:&quot;8182&quot;},{&quot;b&quot;:&quot;7F074DFDF000&quot;,&quot;o&quot;:&quot;FA47D&quot;,&quot;s&quot;:&quot;clone&quot;}],&quot;processInfo&quot;:{ &quot;mongodbVersion&quot; : &quot;3.2.3&quot;, &quot;gitVersion&quot; : &quot;b326ba837cf6f49d65c2f85e1b70f6f31ece7937&quot;, &quot;compiledModules&quot; : [], &quot;uname&quot; : { &quot;sysname&quot; : &quot;Linux&quot;, &quot;release&quot; : &quot;3.13.0-74-generic&quot;, &quot;version&quot; : &quot;#118-Ubuntu SMP Thu Dec 17 22:52:10 UTC 2015&quot;, &quot;machine&quot; : &quot;x86_64&quot; }, &quot;somap&quot; : [ { &quot;elfType&quot; : 2, &quot;b&quot; : &quot;400000&quot;, &quot;buildId&quot; : &quot;C1CD0F405485844DA016C6B5275C8BEF3D68DB7A&quot; }, { &quot;b&quot; : &quot;7FFD17EBB000&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;DC075B751E9FB361F14CD59BD81300A6BB5CB377&quot; }, { &quot;b&quot; : &quot;7F074F5C9000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libssl.so.1.0.0&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;D08DD65F97859C71BB2CBBF1043BD968EFE18AAD&quot; }, { &quot;b&quot; : &quot;7F074F1EE000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libcrypto.so.1.0.0&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;F86FA9FB4ECEB4E06B40DBDF761A4172B70A4229&quot; }, { &quot;b&quot; : &quot;7F074EFE6000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/librt.so.1&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;92FCF41EFE012D6186E31A59AD05BDBB487769AB&quot; }, { &quot;b&quot; : &quot;7F074EDE2000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libdl.so.2&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;C1AE4CB7195D337A77A3C689051DABAA3980CA0C&quot; }, { &quot;b&quot; : &quot;7F074EADE000&quot;, &quot;path&quot; : &quot;/usr/lib/x86_64-linux-gnu/libstdc++.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;4BF6F7ADD8244AD86008E6BF40D90F8873892197&quot; }, { &quot;b&quot; : &quot;7F074E7D8000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libm.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;1D76B71E905CB867B27CEF230FCB20F01A3178F5&quot; }, { &quot;b&quot; : &quot;7F074E5C2000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libgcc_s.so.1&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;36311B4457710AE5578C4BF00791DED7359DBB92&quot; }, { &quot;b&quot; : &quot;7F074E3A4000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libpthread.so.0&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;9318E8AF0BFBE444731BB0461202EF57F7C39542&quot; }, { &quot;b&quot; : &quot;7F074DFDF000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libc.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;30C94DC66A1FE95180C3D68D2B89E576D5AE213C&quot; }, { &quot;b&quot; : &quot;7F074F828000&quot;, &quot;path&quot; : &quot;/lib64/ld-linux-x86-64.so.2&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;9F00581AB3C73E3AEA35995A0C50D24D59A01D47&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; mongod(_ZN5mongo15printStackTraceERSo+0x32) [0x12f14b2]&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; mongod(+0xEF0609) [0x12f0609]&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; mongod(+0xEF0988) [0x12f0988]&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; libpthread.so.0(+0x10340) [0x7f074e3b4340]&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; mongod(_ZN5mongo27CollectionIndexUsageTracker17recordIndexAccessENS_10StringDataE+0x62E) [0xafd0de]&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; mongod(_ZN5mongo19CollectionInfoCache13notifyOfQueryEPNS_16OperationContextERKSt3setISsSt4lessISsESaISsEE+0x38) [0xaccda8]&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; mongod(_ZN5mongo2mr16MapReduceCommand3runEPNS_16OperationContextERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderE+0xAF5) [0xb495c5]&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; mongod(_ZN5mongo7Command3runEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS3_21ReplyBuilderInterfaceE+0x3F9) [0xba5449]&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; mongod(_ZN5mongo7Command11execCommandEPNS_16OperationContextEPS0_RKNS_3rpc16RequestInterfaceEPNS4_21ReplyBuilderInterfaceE+0x406) [0xba6106]&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; mongod(_ZN5mongo11runCommandsEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS2_21ReplyBuilderInterfaceE+0x1F0) [0xb02330]&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; mongod(+0x8AF525) [0xcaf525]&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; mongod(_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0x696) [0xcb1db6]&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; mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortE+0xEC) [0x9968cc]&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; mongod(_ZN5mongo17PortMessageServer17handleIncomingMsgEPv+0x26D) [0x129ee6d]&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; libpthread.so.0(+0x8182) [0x7f074e3ac182]&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; libc.so.6(clone+0x6D) [0x7f074e0d947d]&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;-----  END BACKTRACE  -----&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="1201176" author="ramon.fernandez" created="Fri, 11 Mar 2016 21:04:03 +0000"  >&lt;p&gt;Thanks for your report &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ppeddada&quot; class=&quot;user-hover&quot; rel=&quot;ppeddada&quot;&gt;ppeddada&lt;/a&gt;, the Query team is investigating this issue.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="226328">SERVER-20050</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="113233" name="mongod_error.log.gz" size="20852" author="ppeddada" created="Fri, 11 Mar 2016 20:45:37 +0000"/>
                    </attachments>
                <subtasks>
                    </subtasks>
                <customfields>
                                                <customfield id="customfield_10050" key="com.atlassian.jira.toolkit:comments">
                        <customfieldname># Replies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>14.0</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_18555" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname># of Sprints</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1.0</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                    <customfield id="customfield_12451" key="com.atlassian.jira.plugin.system.customfieldtypes:multiversion">
                        <customfieldname>Backport Completed</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue id="16541">3.2.5</customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_10011" key="com.atlassian.jira.plugin.system.customfieldtypes:radiobuttons">
                        <customfieldname>Backwards Compatibility</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="10038"><![CDATA[Fully Compatible]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                            <customfield id="customfield_10055" key="com.atlassian.jira.ext.charting:firstresponsedate">
                        <customfieldname>Date of 1st Reply</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>Fri, 11 Mar 2016 21:04:03 +0000</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10052" key="com.atlassian.jira.toolkit:dayslastcommented">
                        <customfieldname>Days since reply</customfieldname>
                        <customfieldvalues>
                                        7 years, 45 weeks, 6 days ago
    
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_18254" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Dependencies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue><![CDATA[]]></customfieldvalue>


                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_15850" key="com.atlassian.jira.plugins.jira-development-integration-plugin:devsummary">
                        <customfieldname>Development</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    <customfield id="customfield_10057" key="com.atlassian.jira.toolkit:lastusercommented">
                        <customfieldname>Last comment by Customer</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>true</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_10056" key="com.atlassian.jira.toolkit:lastupdaterorcommenter">
                        <customfieldname>Last commenter</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>ian@mongodb.com</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_11151" key="com.atlassian.jira.toolkit:LastCommentDate">
                        <customfieldname>Last public comment date</customfieldname>
                        <customfieldvalues>
                            7 years, 45 weeks, 6 days ago
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_16465" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Linked BF Score</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>0.0</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                        <customfield id="customfield_10032" key="com.atlassian.jira.plugin.system.customfieldtypes:select">
                        <customfieldname>Operating System</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="10026"><![CDATA[ALL]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_10051" key="com.atlassian.jira.toolkit:participants">
                        <customfieldname>Participants</customfieldname>
                        <customfieldvalues>
                                        <customfieldvalue>charlie.swanson@mongodb.com</customfieldvalue>
            <customfieldvalue>xgen-internal-githook</customfieldvalue>
            <customfieldvalue>james.wahlin@mongodb.com</customfieldvalue>
            <customfieldvalue>ppeddada</customfieldvalue>
            <customfieldvalue>ramon.fernandez@mongodb.com</customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                        <customfield id="customfield_14254" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Product Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|hrkduf:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_12550" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>2|hreevz:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10558" key="com.pyxis.greenhopper.jira:gh-global-rank">
                        <customfieldname>Rank (Obsolete)</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>9223372036854775807</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_23361" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Requested By</customfieldname>
                        <customfieldvalues>
                                

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                        <customfield id="customfield_10557" key="com.pyxis.greenhopper.jira:gh-sprint">
                        <customfieldname>Sprint</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue id="967">Query 12 (04/04/16)</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                        <customfield id="customfield_10750" key="com.atlassian.jira.plugin.system.customfieldtypes:textarea">
                        <customfieldname>Steps To Reproduce</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>&lt;p&gt;1) run aggregation on a collection in parallel on multiple keys &lt;br/&gt;
2) drop the target collection after completion&lt;/p&gt;</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                    <customfield id="customfield_10053" key="com.atlassian.jira.ext.charting:timeinstatus">
                        <customfieldname>Time In Status</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        <customfield id="customfield_22870" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Triagers</customfieldname>
                        <customfieldvalues>
                                

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                    <customfield id="customfield_14350" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>serverRank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|hrj9qf:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                    </customfields>
    </item>
</channel>
</rss>