[SERVER-39391] Segmentation fault when performing aggregation with $lookup.let and $lookup.pipeline Created: 06/Feb/19  Updated: 28/Jul/21  Resolved: 06/May/19

Status: Closed
Project: Core Server
Component/s: Aggregation Framework
Affects Version/s: 4.0.6
Fix Version/s: None

Type: Bug Priority: Major - P3
Reporter: Hubert Bielenia Assignee: Danny Hatcher (Inactive)
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Operating System: ALL
Participants:

 Description   

Hello

I encounter a segmentation fault problem with MongoDB 4.0.6 when executing one particular aggregation.

MongoDB instance is deployed in Docker 18.09.1, running on Ubuntu 18.04.1, running on EC2 t3.xlarge instance. I was unable to reproduce the error in any other environment, however, it's often reproducible within these specifications.

I've nailed the issue to this set of example data and aggregation query:

db.actions

{ "_id" : ObjectId("5c5994639df716001e51e2c5"), "company_id" : 1, "campaign_id" : ObjectId("5c5994639df716001e51e2c4"), "brand" : "Test", "created_at" : ISODate("
2019-02-05T13:49:23.670Z") } 
{ "_id" : ObjectId("5c59974b6c62000010a95700"), "company_id" : 1, "campaign_id" : ObjectId("5c59974b6c62000010a956ff"), "brand" : "Test", "created_at" : ISODate("
2019-02-05T14:01:47.274Z") }

db.campaigns

{ "_id" : ObjectId("5c5994639df716001e51e2c4"), "name" : "FR_WK1_test", "company_id" : 1, "created_at"
 : ISODate("2019-02-05T13:49:23.665Z") } 
{ "_id" : ObjectId("5c59974b6c62000010a956ff"), "name" : "FR_WK2_test2", "company_id" : 1, "created_at
" : ISODate("2019-02-05T14:01:47.268Z") }

The query

db.actions.aggregate([
  { '$match': { 'company_id': 1 } },
  { '$group': {
    '_id': '$campaign_id',
    'brands': { '$addToSet': '$brand' },
  }},
  { '$lookup': {
    from: 'campaigns',
    localField: '_id',
    foreignField: '_id',
    as: 'campaign',
  }},
  { '$unwind': '$campaign' },
  { '$lookup': {
    from: 'data',
    let: { 'action_campaign_id': '$_id' },
    pipeline: [
      { '$match': {
        '$expr': {
          '$eq': ['$campaign_id', '$$action_campaign_id'],
        },
      }},
      { '$group': {
        '_id': '$campaign_id',
        'clicks': { '$sum': '$data.clicks' },
      }},
    ],
    as: 'kpi',
  }}
])

db.data collection exists, but is empty. Adding some records to it didn't affect the outcome.

The query above results either in this error:

2019-02-06T12:50:16.859+0000 E QUERY    [js] Error: command failed: { 
        "ok" : 0, 
        "errmsg" : "BufBuilder attempted to grow() to 838295666 bytes, past the 64MB limit.", 
        "code" : 13548, 
        "codeName" : "Location13548" 
} : aggregate failed : 
_getErrorWithCode@src/mongo/shell/utils.js:25:13 
doassert@src/mongo/shell/assert.js:18:14 
_assertCommandWorked@src/mongo/shell/assert.js:536:17 
assert.commandWorked@src/mongo/shell/assert.js:620:16 
DB.prototype._runAggregate@src/mongo/shell/db.js:260:9 
DBCollection.prototype.aggregate@src/mongo/shell/collection.js:1062:12

Or in this segfault:

 

2019-02-06T10:26:07.853+0000 F - [conn4] Invalid access at address: 0x5593140fad97
2019-02-06T10:26:07.892+0000 F - [conn4] Got signal: 11 (Segmentation fault).
0x558c0d646b61 0x558c0d645d79 0x558c0d6463e6 0x7fbb5bf33390 0x558c0d46ae7f 0x558c0c56b8f6 0x558c0c56d1d0 0x558c0c570282 0x558c0c5710d4 0x558c0c5715bb 0x558c0cc1e96c 0x558c0cc203cc 0x558c0cc20c67 0x558c0cc56858 0x558c0cc6d56d 0x558c0c5311b5 0x558c0c53136c 0x558c0c5318bb 0x558c0c58229d 0x558c0c582c2b 0x558c0c32937d 0x558c0c31f2a4 0x558c0d0b13b9 0x558c0bd10cb5 0x558c0bd129a9 0x558c0bd138e1 0x558c0bcff15a 0x558c0bd0bc0a 0x558c0bd06897 0x558c0bd0a0e1 0x558c0cea17c2 0x558c0bd04a80 0x558c0bd07c65 0x558c0bd05fd7 0x558c0bd0691d 0x558c0bd0a0e1 0x558c0cea1d25 0x558c0d59f6e4 0x7fbb5bf296ba 0x7fbb5bc5f41d
----- BEGIN BACKTRACE -----
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mongod(_ZN5mongo19ServiceStateMachine22_scheduleNextWithGuardENS0_11ThreadGuardENS_9transport15ServiceExecutor13ScheduleFlagsENS2_23ServiceExecutorTaskNameENS0_9OwnershipE+0x150) [0x558c0bd04a80]
mongod(_ZN5mongo19ServiceStateMachine15_sourceCallbackENS_6StatusE+0xB05) [0x558c0bd07c65]
mongod(_ZN5mongo19ServiceStateMachine14_sourceMessageENS0_11ThreadGuardE+0x357) [0x558c0bd05fd7]
mongod(_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE+0x11D) [0x558c0bd0691d]
mongod(+0xAC00E1) [0x558c0bd0a0e1]
mongod(+0x1C57D25) [0x558c0cea1d25]
mongod(+0x23556E4) [0x558c0d59f6e4]
libpthread.so.0(+0x76BA) [0x7fbb5bf296ba]
libc.so.6(clone+0x6D) [0x7fbb5bc5f41d]
----- END BACKTRACE -----

 

The issue appears to be caused by this expression in $lookup.pipeline:

 

{
  '$match': {
    '$expr': {
      '$eq': ['$campaign_id', '$$action_campaign_id'],
    },
  },
}

 

Removing it makes the output appear:

 

{ "_id" : ObjectId("5c59974b6c62000010a956ff"), "brands" : [ "Test" ], "campaign" : { "_id" : ObjectId("5c59974b6c62000010a956ff")
, "name" : "FR_WK2_test2", "company_id" : 1, "created_at" : ISODate("2019-02-05T14:01:47.268Z") }, "kp
i" : [ ] } 
{ "_id" : ObjectId("5c5994639df716001e51e2c4"), "brands" : [ "Test" ], "campaign" : { "_id" : ObjectId("5c5994639df716001e51e2c4")
, "name" : "FR_WK1_test", "company_id" : 1, "created_at" : ISODate("2019-02-05T13:49:23.665Z") }, "kpi
" : [ ] }

 

As you can probably tell, the $match expression doesn't change anything here, since the data collection is empty. However, it was added before to address performance when data collection exists and contains big amount of documents and I would like to leave it, especially given the fact that it looks totally okay given the documentation: https://docs.mongodb.com/manual/reference/operator/aggregation/lookup/#specify-multiple-join-conditions-with-lookup



 Comments   
Comment by HAO JIE ELVIS JIAO [ 28/Jul/21 ]

hi hbielenia, we meet the same error, could you let me know the root cause of this issue, because of data?

it may very useful for us, thanks.

Comment by Danny Hatcher (Inactive) [ 25/Apr/19 ]

hbielenia are you still experiencing this issue?

Comment by Danny Hatcher (Inactive) [ 28/Feb/19 ]

Hello Hubert,

After speaking with some of my colleagues, we are not aware of anything that could be triggering this problem. Have you had success in speaking with Docker?

Thank you,

Danny

Comment by Hubert Bielenia [ 16/Feb/19 ]

Hi, sorry for the delay.

This week, I did more attempts at reproducing the issue, including a try with the same environment (matching Docker and Ubuntu versions). Unfortunately, none of them was successful. I determined only one additional piece of information: recreating the container and wiping data makes issues go away, until the server is restarted, at which point only container is recreated but data stays the same. Then, the query in description causes errors and segfaults again.

I thought this may indicate some kind of data corruption taking place, but validation gave no results:

> db.actions.validate({full:true});
{
 "ns" : "mydb.actions",
 "nInvalidDocuments" : NumberLong(0),
 "nrecords" : 5,
 "nIndexes" : 1,
 "keysPerIndex" : {
 "mydb.actions.$_id_" : 5
 },
 "indexDetails" : {
 "mydb.actions.$_id_" : {
 "valid" : true
 }
 },
 "valid" : true,
 "warnings" : [ ],
 "errors" : [ ],
 "ok" : 1
}
> db.campaigns.validate({full:true});
{
 "ns" : "mydb.campaigns",
 "nInvalidDocuments" : NumberLong(0),
 "nrecords" : 3,
 "nIndexes" : 1,
 "keysPerIndex" : {
 "mydb.campaigns.$_id_" : 3
 },
 "indexDetails" : {
 "mydb.campaigns.$_id_" : {
 "valid" : true
 }
 },
 "valid" : true,
 "warnings" : [ ],
 "errors" : [ ],
 "ok" : 1
}
> db.data.validate({full:true});
{
 "ns" : "mydb.data",
 "nInvalidDocuments" : NumberLong(0),
 "nrecords" : 3,
 "nIndexes" : 1,
 "keysPerIndex" : {
 "mydb.data.$_id_" : 3
 },
 "indexDetails" : {
 "mydb.data.$_id_" : {
 "valid" : true
 }
 },
 "valid" : true,
 "warnings" : [ ],
 "errors" : [ ],
 "ok" : 1
}

To me, it would indicate that problem lies with Docker runtime and not Mongo, but I need to point out that Mongo is the only service from several others that misbehaves like that. Nonetheless, if your technical expertise would suggest so, I'll go and file this with Docker guys and see if they can help.

You also requested mongod logs - the backtrace in description is taken from there, If you want full then here's an example from recent run:

mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.029+0000 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] MongoDB starting : pid=1 port=27017 dbpath=/data/db 64-bit host=33014e4a86f0
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] db version v4.0.6
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] git version: caa42a1f75a56c7643d0b68d3880444375ec42e3
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2g 1 Mar 2016
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] allocator: tcmalloc
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] modules: none
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] build environment:
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] distmod: ubuntu1604
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] distarch: x86_64
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] target_arch: x86_64
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I CONTROL [initandlisten] options: { net: { bindIpAll: true }, security: { authorization: "enabled" } }
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 W STORAGE [initandlisten] Detected unclean shutdown - /data/db/mongod.lock is not empty.
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I STORAGE [initandlisten] Detected data files in /data/db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 W STORAGE [initandlisten] Recovering data from the last clean checkpoint.
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I STORAGE [initandlisten] 
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.033+0000 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=7415M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=(recovery_progress),
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.749+0000 I STORAGE [initandlisten] WiredTiger message [1550328442:749042][1:0x7fd1a20d4a40], txn-recover: Main recovery loop: starting at 15/12288 to 16/256
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.749+0000 I STORAGE [initandlisten] WiredTiger message [1550328442:749445][1:0x7fd1a20d4a40], txn-recover: Recovering log 15 through 16
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.818+0000 I STORAGE [initandlisten] WiredTiger message [1550328442:818293][1:0x7fd1a20d4a40], txn-recover: Recovering log 16 through 16
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.866+0000 I STORAGE [initandlisten] WiredTiger message [1550328442:866961][1:0x7fd1a20d4a40], txn-recover: Set global recovery timestamp: 0
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:22.880+0000 I RECOVERY [initandlisten] WiredTiger recoveryTimestamp. Ts: Timestamp(0, 0)
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.005+0000 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.006+0000 I NETWORK [initandlisten] waiting for connections on port 27017
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.181+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35440 #1 (1 connection now open)
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.184+0000 I ACCESS [conn1] Successfully authenticated as principal api_server on admin
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.192+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35442 #2 (2 connections now open)
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.195+0000 I ACCESS [conn2] Successfully authenticated as principal api_server on admin
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.263+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35444 #3 (3 connections now open)
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.266+0000 I ACCESS [conn3] Successfully authenticated as principal api_server on admin
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.316+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35446 #4 (4 connections now open)
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:23.318+0000 I ACCESS [conn4] Successfully authenticated as principal api_server on admin
mongo.1.nis0knxf0jj7@ip-172-31-19-75 | 2019-02-16T14:47:24.007+0000 I FTDC [ftdc] Unclean full-time diagnostic data capture shutdown detected, found interim file, some metrics may have been lost. OK
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.691+0000 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] MongoDB starting : pid=1 port=27017 dbpath=/data/db 64-bit host=fa6146aab85d
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] db version v4.0.6
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] git version: caa42a1f75a56c7643d0b68d3880444375ec42e3
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2g 1 Mar 2016
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] allocator: tcmalloc
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] modules: none
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] build environment:
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] distmod: ubuntu1604
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] distarch: x86_64
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] target_arch: x86_64
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.708+0000 I CONTROL [initandlisten] options: { net: { bindIpAll: true }, security: { authorization: "enabled" } }
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.724+0000 I STORAGE [initandlisten] Detected data files in /data/db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.724+0000 I STORAGE [initandlisten] 
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.724+0000 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.724+0000 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:34:59.724+0000 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=7415M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=(recovery_progress),
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:00.622+0000 I STORAGE [initandlisten] WiredTiger message [1550327700:622040][1:0x7f9d0d6a7a40], txn-recover: Main recovery loop: starting at 14/174592 to 15/256
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:00.827+0000 I STORAGE [initandlisten] WiredTiger message [1550327700:827225][1:0x7f9d0d6a7a40], txn-recover: Recovering log 14 through 15
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:00.951+0000 I STORAGE [initandlisten] WiredTiger message [1550327700:951573][1:0x7f9d0d6a7a40], txn-recover: Recovering log 15 through 15
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:01.028+0000 I STORAGE [initandlisten] WiredTiger message [1550327701:28127][1:0x7f9d0d6a7a40], txn-recover: Set global recovery timestamp: 0
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:01.057+0000 I RECOVERY [initandlisten] WiredTiger recoveryTimestamp. Ts: Timestamp(0, 0)
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:01.309+0000 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:01.324+0000 I NETWORK [initandlisten] waiting for connections on port 27017
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.119+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35352 #1 (1 connection now open)
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.125+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35358 #2 (2 connections now open)
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.130+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35368 #3 (3 connections now open)
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.130+0000 I NETWORK [listener] connection accepted from 10.0.0.18:35370 #4 (4 connections now open)
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.136+0000 I NETWORK [conn1] received client metadata from 10.0.0.18:35352 conn1: { driver: { name: "nodejs", version: "3.0.2" }, os: { type: "Linux", name: "linux", architecture: "x64", version: "4.15.0-1032-aws" }, platform: "Node.js v11.6.0, LE, mongodb-core: 3.0.2" }
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.141+0000 I NETWORK [conn2] received client metadata from 10.0.0.18:35358 conn2: { driver: { name: "nodejs", version: "3.0.2" }, os: { type: "Linux", name: "linux", architecture: "x64", version: "4.15.0-1032-aws" }, platform: "Node.js v11.6.0, LE, mongodb-core: 3.0.2" }
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.152+0000 I NETWORK [conn3] received client metadata from 10.0.0.18:35368 conn3: { driver: { name: "nodejs", version: "3.0.2" }, os: { type: "Linux", name: "linux", architecture: "x64", version: "4.15.0-1032-aws" }, platform: "Node.js v11.6.0, LE, mongodb-core: 3.0.2" }
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.156+0000 I NETWORK [conn4] received client metadata from 10.0.0.18:35370 conn4: { driver: { name: "nodejs", version: "3.0.2" }, os: { type: "Linux", name: "linux", architecture: "x64", version: "4.15.0-1032-aws" }, platform: "Node.js v11.6.0, LE, mongodb-core: 3.0.2" }
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.173+0000 I ACCESS [conn2] Successfully authenticated as principal api_server on admin
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.173+0000 I ACCESS [conn1] Successfully authenticated as principal api_server on admin
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.178+0000 I ACCESS [conn3] Successfully authenticated as principal api_server on admin
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:35:06.178+0000 I ACCESS [conn4] Successfully authenticated as principal api_server on admin
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:42:46.966+0000 I NETWORK [listener] connection accepted from 127.0.0.1:38250 #5 (5 connections now open)
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:42:46.967+0000 I NETWORK [conn5] received client metadata from 127.0.0.1:38250 conn5: { application: { name: "MongoDB Shell" }, driver: { name: "MongoDB Internal Client", version: "4.0.6" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "16.04" } }
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:42:46.980+0000 I ACCESS [conn5] Successfully authenticated as principal admin on admin
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:42:47.009+0000 I ACCESS [conn5] Successfully authenticated as principal admin on admin
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:47:16.741+0000 F - [conn5] Invalid access at address: 0
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 2019-02-16T14:47:16.778+0000 F - [conn5] Got signal: 11 (Segmentation fault).
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 0x55a3de180b61 0x55a3de17fd79 0x55a3de1803e6 0x7f9d0be2b390 0x7f9d0bb9e168 0x55a3ddfa4e78 0x55a3dd0a58f6 0x55a3dd0a71d0 0x55a3dd0aa282 0x55a3dd0ab0d4 0x55a3dd0ab5bb 0x55a3dd75896c 0x55a3dd75ad06 0x55a3dd7a756d 0x55a3dd06b1b5 0x55a3dd06b36c 0x55a3dd06b8bb 0x55a3dd0bc29d 0x55a3dd0bcc2b 0x55a3dce6337d 0x55a3dce592a4 0x55a3ddbeb3b9 0x55a3dc84acb5 0x55a3dc84c9a9 0x55a3dc84d8e1 0x55a3dc83915a 0x55a3dc845c0a 0x55a3dc840897 0x55a3dc8440e1 0x55a3dd9db7c2 0x55a3dc83ea80 0x55a3dc841c65 0x55a3dc83ffd7 0x55a3dc84091d 0x55a3dc8440e1 0x55a3dd9dbd25 0x55a3de0d96e4 0x7f9d0be216ba 0x7f9d0bb5741d
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | ----- BEGIN BACKTRACE -----
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | 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mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo15printStackTraceERSo+0x41) [0x55a3de180b61]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0x23FBD79) [0x55a3de17fd79]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0x23FC3E6) [0x55a3de1803e6]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | libpthread.so.0(+0x11390) [0x7f9d0be2b390]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | libc.so.6(+0x14E168) [0x7f9d0bb9e168]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZNK5mongo13CollationSpec6toBSONEv+0x2B8) [0x55a3ddfa4e78]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0x13218F6) [0x55a3dd0a58f6]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo9PipelineD15prepareExecutorEPNS_16OperationContextEPNS_10CollectionERKNS_15NamespaceStringEPNS_8PipelineERKN5boost13intrusive_ptrINS_17ExpressionContextEEEbRKNSB_INS_18DocumentSourceSortEEERKNS_11DepsTrackerERKNS_7BSONObjEPKNS_18AggregationRequestEPSN_ST_+0x590) [0x55a3dd0a71d0]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo9PipelineD19prepareCursorSourceEPNS_10CollectionERKNS_15NamespaceStringEPKNS_18AggregationRequestEPNS_8PipelineE+0x732) [0x55a3dd0aa282]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo9PipelineD15MongoDInterface28attachCursorSourceToPipelineERKN5boost13intrusive_ptrINS_17ExpressionContextEEEPNS_8PipelineE+0x254) [0x55a3dd0ab0d4]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo9PipelineD15MongoDInterface12makePipelineERKSt6vectorINS_7BSONObjESaIS3_EERKN5boost13intrusive_ptrINS_17ExpressionContextEEENS_21MongoProcessInterface19MakePipelineOptionsE+0xEB) [0x55a3dd0ab5bb]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo20DocumentSourceLookUp13buildPipelineERKNS_8DocumentE+0x1EC) [0x55a3dd75896c]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo20DocumentSourceLookUp7getNextEv+0xE6) [0x55a3dd75ad06]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo8Pipeline7getNextEv+0x3D) [0x55a3dd7a756d]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo18PipelineProxyStage11getNextBsonEv+0x35) [0x55a3dd06b1b5]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo18PipelineProxyStage6doWorkEPm+0xFC) [0x55a3dd06b36c]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo9PlanStage4workEPm+0x6B) [0x55a3dd06b8bb]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo12PlanExecutor11getNextImplEPNS_11SnapshottedINS_7BSONObjEEEPNS_8RecordIdE+0x50D) [0x55a3dd0bc29d]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo12PlanExecutor7getNextEPNS_7BSONObjEPNS_8RecordIdE+0x4B) [0x55a3dd0bcc2b]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo12runAggregateEPNS_16OperationContextERKNS_15NamespaceStringERKNS_18AggregationRequestERKNS_7BSONObjERNS_14BSONObjBuilderE+0x1E5D) [0x55a3dce6337d]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0x10D52A4) [0x55a3dce592a4]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo12BasicCommand10Invocation3runEPNS_16OperationContextEPNS_19CommandReplyBuilderE+0xD9) [0x55a3ddbeb3b9]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0xAC6CB5) [0x55a3dc84acb5]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0xAC89A9) [0x55a3dc84c9a9]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo23ServiceEntryPointCommon13handleRequestEPNS_16OperationContextERKNS_7MessageERKNS0_5HooksE+0x3C1) [0x55a3dc84d8e1]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo23ServiceEntryPointMongod13handleRequestEPNS_16OperationContextERKNS_7MessageE+0x3A) [0x55a3dc83915a]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo19ServiceStateMachine15_processMessageENS0_11ThreadGuardE+0xBA) [0x55a3dc845c0a]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE+0x97) [0x55a3dc840897]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0xAC00E1) [0x55a3dc8440e1]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo9transport26ServiceExecutorSynchronous8scheduleESt8functionIFvvEENS0_15ServiceExecutor13ScheduleFlagsENS0_23ServiceExecutorTaskNameE+0x1A2) [0x55a3dd9db7c2]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo19ServiceStateMachine22_scheduleNextWithGuardENS0_11ThreadGuardENS_9transport15ServiceExecutor13ScheduleFlagsENS2_23ServiceExecutorTaskNameENS0_9OwnershipE+0x150) [0x55a3dc83ea80]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo19ServiceStateMachine15_sourceCallbackENS_6StatusE+0xB05) [0x55a3dc841c65]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo19ServiceStateMachine14_sourceMessageENS0_11ThreadGuardE+0x357) [0x55a3dc83ffd7]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE+0x11D) [0x55a3dc84091d]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0xAC00E1) [0x55a3dc8440e1]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0x1C57D25) [0x55a3dd9dbd25]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | mongod(+0x23556E4) [0x55a3de0d96e4]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | libpthread.so.0(+0x76BA) [0x7f9d0be216ba]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | libc.so.6(clone+0x6D) [0x7f9d0bb5741d]
mongo.1.4f4adtf5jh7z@ip-172-31-19-75 | ----- END BACKTRACE -----

Comment by Hubert Bielenia [ 08/Feb/19 ]

Hi Danny, thanks for your help.

By "often reproducible" I meant that this query have sometimes resulted in BufBuilder error, and sometimes in segfault. These seem related, but the report itself is about the segfault, hence my wording. Indeed, every attempt to execute this query resulted in one of the above.

I'll provide you with the requested information next week. As to the reproducibility, I haven't tested with another Ubuntu 18.04 environment - I'll try that as well.

Thanks again!

Comment by Danny Hatcher (Inactive) [ 08/Feb/19 ]

Hello Hubert,

I've tried using your provided documents and query on Ubuntu 18.04 but I'm unable to replicate your issue. You mention that you have been unable to cause the problem in other environments; does that mean you are unable to reproduce in other Ubuntu 18.04 environments as well? You also mention that it's "often reproducible" on that specific environment that sees the problem; how often is often?

Could you reproduce the issue once again and provide the mongod log files from the server that fails?

Thank you,

Danny

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