$graphLookup triggers null pointer dereference

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      Run the above query and mondb crashes with:

      2016-11-29T14:18:21.251+0000 E QUERY    [main] Error: error doing query: failed: network error while attempting to run command 'aggregate' on host '127.0.0.1:27017'  :
DB.prototype.runCommand@src/mongo/shell/db.js:132:1
DB.prototype.runReadCommand@src/mongo/shell/db.js:109:16
DBCollection.prototype._dbReadCommand@src/mongo/shell/collection.js:183:12
DBCollection.prototype.aggregate/doAgg<@src/mongo/shell/collection.js:1298:30
DBCollection.prototype.aggregate@src/mongo/shell/collection.js:1301:15
@(shell):1:1

      The log file from "var/log/mongodb/mongod.log" contains:

      2016-11-29T14:17:08.274+0000 I NETWORK  [thread1] connection accepted from 127.0.0.1:56861 #18 (16 connections now open)
2016-11-29T14:17:08.275+0000 I NETWORK  [conn18] received client metadata from 127.0.0.1:56861 conn18: { application: { name: "MongoDB Shell" }, driver: { name: "MongoDB Internal Client", version: "3.4.0-rc3-21-gdfe9b68" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "14.04" } }
2016-11-29T14:17:44.279+0000 I -        [conn18] end connection 127.0.0.1:56861 (16 connections now open)
2016-11-29T14:18:15.786+0000 I NETWORK  [thread1] connection accepted from 127.0.0.1:56862 #19 (16 connections now open)
2016-11-29T14:18:15.787+0000 I NETWORK  [conn19] received client metadata from 127.0.0.1:56862 conn19: { application: { name: "MongoDB Shell" }, driver: { name: "MongoDB Internal Client", version: "3.4.0-rc3-21-gdfe9b68" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "14.04" } }
2016-11-29T14:18:21.117+0000 F -        [conn19] Invalid access at address: 0xa8
2016-11-29T14:18:21.134+0000 F -        [conn19] Got signal: 11 (Segmentation fault).

 0x7f0314e774d1 0x7f0314e765c9 0x7f0314e76c36 0x7f0312564330 0x7f03146cc811 0x7f03146cf8b9 0x7f0314664ad5 0x7f031466506f 0x7f0314713292 0x7f03144a7045 0x7f03144a723c 0x7f03144a7833 0x7f03147aaf9a 0x7f03147ab8bb 0x7f03143effbb 0x7f03143f14e9 0x7f031436930b 0x7f031436a550 0x7f0314981c7d 0x7f0314589b4d 0x7f031417a9dd 0x7f031417b31d 0x7f0314ddd242 0x7f031255c184 0x7f031228937d
----- BEGIN BACKTRACE -----
{"backtrace":[{"b":"7F03138FA000","o":"157D4D1","s":"_ZN5mongo15printStackTraceERSo"},{"b":"7F03138FA000","o":"157C5C9"},{"b":"7F03138FA000","o":"157CC36"},{"b":"7F0312554000","o":"10330"},{"b":"7F03138FA000","o":"DD2811","s":"_ZNK5mongo17ExpressionCompare16evaluateInternalEPNS_9VariablesE"},{"b":"7F03138FA000","o":"DD58B9","s":"_ZNK5mongo16ExpressionObject16evaluateInternalEPNS_9VariablesE"},{"b":"7F03138FA000","o":"D6AAD5","s":"_ZN5mongo25DocumentSourceGraphLookUp13performSearchEv"},{"b":"7F03138FA000","o":"D6B06F","s":"_ZN5mongo25DocumentSourceGraphLookUp7getNextEv"},{"b":"7F03138FA000","o":"E19292","s":"_ZN5mongo8Pipeline7getNextEv"},{"b":"7F03138FA000","o":"BAD045","s":"_ZN5mongo18PipelineProxyStage11getNextBsonEv"},{"b":"7F03138FA000","o":"BAD23C","s":"_ZN5mongo18PipelineProxyStage6doWorkEPm"},{"b":"7F03138FA000","o":"BAD833","s":"_ZN5mongo9PlanStage4workEPm"},{"b":"7F03138FA000","o":"EB0F9A","s":"_ZN5mongo12PlanExecutor11getNextImplEPNS_11SnapshottedINS_7BSONObjEEEPNS_8RecordIdE"},{"b":"7F03138FA000","o":"EB18BB","s":"_ZN5mongo12PlanExecutor7getNextEPNS_7BSONObjEPNS_8RecordIdE"},{"b":"7F03138FA000","o":"AF5FBB"},{"b":"7F03138FA000","o":"AF74E9"},{"b":"7F03138FA000","o":"A6F30B","s":"_ZN5mongo7Command3runEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS3_21ReplyBuilderInterfaceE"},{"b":"7F03138FA000","o":"A70550","s":"_ZN5mongo7Command11execCommandEPNS_16OperationContextEPS0_RKNS_3rpc16RequestInterfaceEPNS4_21ReplyBuilderInterfaceE"},{"b":"7F03138FA000","o":"1087C7D","s":"_ZN5mongo11runCommandsEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS2_21ReplyBuilderInterfaceE"},{"b":"7F03138FA000","o":"C8FB4D","s":"_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE"},{"b":"7F03138FA000","o":"8809DD","s":"_ZN5mongo23ServiceEntryPointMongod12_sessionLoopERKSt10shared_ptrINS_9transport7SessionEE"},{"b":"7F03138FA000","o":"88131D"},{"b":"7F03138FA000","o":"14E3242"},{"b":"7F0312554000","o":"8184"},{"b":"7F031218F000","o":"FA37D","s":"clone"}],"processInfo":{ "mongodbVersion" : "3.4.0-rc3-21-gdfe9b68", "gitVersion" : "dfe9b688956e19095e2d37e21bb40c7b7ad17900", "compiledModules" : [], "uname" : { "sysname" : "Linux", "release" : "3.13.0-92-generic", "version" : "#139-Ubuntu SMP Tue Jun 28 20:42:26 UTC 2016", "machine" : "x86_64" }, "somap" : [ { "b" : "7F03138FA000", "elfType" : 3, "buildId" : "EFB15FEA59BDDC105B35964BBC570A9D8804C7CB" }, { "b" : "7FFFAA0A9000", "elfType" : 3, "buildId" : "7F14688F101A2ACE5CAD23DFBFBC918616651576" }, { "b" : "7F0313476000", "path" : "/lib/x86_64-linux-gnu/libssl.so.1.0.0", "elfType" : 3, "buildId" : "74864DB9D5F69D39A67E4755012FB6573C469B3D" }, { "b" : "7F031309A000", "path" : "/lib/x86_64-linux-gnu/libcrypto.so.1.0.0", "elfType" : 3, "buildId" : "AAE7CFF8351B730830BDBCE0DCABBE06574B7144" }, { "b" : "7F0312E92000", "path" : "/lib/x86_64-linux-gnu/librt.so.1", "elfType" : 3, "buildId" : "E2A6DD5048A0A051FD61043BDB69D8CC68192AB7" }, { "b" : "7F0312C8E000", "path" : "/lib/x86_64-linux-gnu/libdl.so.2", "elfType" : 3, "buildId" : "DA9B8C234D0FE9FD8CAAC8970A7EC1B6C8F6623F" }, { "b" : "7F0312988000", "path" : "/lib/x86_64-linux-gnu/libm.so.6", "elfType" : 3, "buildId" : "D144258E614900B255A31F3FD2283A878670D5BC" }, { "b" : "7F0312772000", "path" : "/lib/x86_64-linux-gnu/libgcc_s.so.1", "elfType" : 3, "buildId" : "36311B4457710AE5578C4BF00791DED7359DBB92" }, { "b" : "7F0312554000", "path" : "/lib/x86_64-linux-gnu/libpthread.so.0", "elfType" : 3, "buildId" : "31E9F21AE8C10396171F1E13DA15780986FA696C" }, { "b" : "7F031218F000", "path" : "/lib/x86_64-linux-gnu/libc.so.6", "elfType" : 3, "buildId" : "CF699A15CAAE64F50311FC4655B86DC39A479789" }, { "b" : "7F03136D5000", "path" : "/lib64/ld-linux-x86-64.so.2", "elfType" : 3, "buildId" : "D0F537904076D73F29E4A37341F8A449E2EF6CD0" } ] }}
 mongod(_ZN5mongo15printStackTraceERSo+0x41) [0x7f0314e774d1]
 mongod(+0x157C5C9) [0x7f0314e765c9]
 mongod(+0x157CC36) [0x7f0314e76c36]
 libpthread.so.0(+0x10330) [0x7f0312564330]
 mongod(_ZNK5mongo17ExpressionCompare16evaluateInternalEPNS_9VariablesE+0x61) [0x7f03146cc811]
 mongod(_ZNK5mongo16ExpressionObject16evaluateInternalEPNS_9VariablesE+0x99) [0x7f03146cf8b9]
 mongod(_ZN5mongo25DocumentSourceGraphLookUp13performSearchEv+0x75) [0x7f0314664ad5]
 mongod(_ZN5mongo25DocumentSourceGraphLookUp7getNextEv+0x9F) [0x7f031466506f]
 mongod(_ZN5mongo8Pipeline7getNextEv+0x42) [0x7f0314713292]
 mongod(_ZN5mongo18PipelineProxyStage11getNextBsonEv+0x35) [0x7f03144a7045]
 mongod(_ZN5mongo18PipelineProxyStage6doWorkEPm+0x11C) [0x7f03144a723c]
 mongod(_ZN5mongo9PlanStage4workEPm+0x63) [0x7f03144a7833]
 mongod(_ZN5mongo12PlanExecutor11getNextImplEPNS_11SnapshottedINS_7BSONObjEEEPNS_8RecordIdE+0x19A) [0x7f03147aaf9a]
 mongod(_ZN5mongo12PlanExecutor7getNextEPNS_7BSONObjEPNS_8RecordIdE+0x4B) [0x7f03147ab8bb]
 mongod(+0xAF5FBB) [0x7f03143effbb]
 mongod(+0xAF74E9) [0x7f03143f14e9]
 mongod(_ZN5mongo7Command3runEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS3_21ReplyBuilderInterfaceE+0x5FB) [0x7f031436930b]
 mongod(_ZN5mongo7Command11execCommandEPNS_16OperationContextEPS0_RKNS_3rpc16RequestInterfaceEPNS4_21ReplyBuilderInterfaceE+0x9E0) [0x7f031436a550]
 mongod(_ZN5mongo11runCommandsEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS2_21ReplyBuilderInterfaceE+0x26D) [0x7f0314981c7d]
 mongod(_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0xCBD) [0x7f0314589b4d]
 mongod(_ZN5mongo23ServiceEntryPointMongod12_sessionLoopERKSt10shared_ptrINS_9transport7SessionEE+0x1ED) [0x7f031417a9dd]
 mongod(+0x88131D) [0x7f031417b31d]
 mongod(+0x14E3242) [0x7f0314ddd242]
 libpthread.so.0(+0x8184) [0x7f031255c184]
 libc.so.6(clone+0x6D) [0x7f031228937d]
-----  END BACKTRACE  -----
2016-11-29T14:18:21.252+0000 I NETWORK  [main] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2016-11-29T14:18:21.256+0000 I NETWORK  [main] Socket recv() Connection reset by peer 127.0.0.1:27017
2016-11-29T14:18:21.256+0000 I NETWORK  [main] SocketException: remote: (NONE):0 error: 9001 socket exception [RECV_ERROR] server [127.0.0.1:27017]
2016-11-29T14:18:21.256+0000 I NETWORK  [main] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed
      Show
      Run the above query and mondb crashes with: 2016-11-29T14:18:21.251+0000 E QUERY [main] Error: error doing query: failed: network error while attempting to run command 'aggregate' on host '127.0.0.1:27017' : DB.prototype.runCommand@src/mongo/shell/db.js:132:1 DB.prototype.runReadCommand@src/mongo/shell/db.js:109:16 DBCollection.prototype._dbReadCommand@src/mongo/shell/collection.js:183:12 DBCollection.prototype.aggregate/doAgg<@src/mongo/shell/collection.js:1298:30 DBCollection.prototype.aggregate@src/mongo/shell/collection.js:1301:15 @(shell):1:1 The log file from "var/log/mongodb/mongod.log" contains: 2016-11-29T14:17:08.274+0000 I NETWORK [thread1] connection accepted from 127.0.0.1:56861 #18 (16 connections now open) 2016-11-29T14:17:08.275+0000 I NETWORK [conn18] received client metadata from 127.0.0.1:56861 conn18: { application: { name: "MongoDB Shell" }, driver: { name: "MongoDB Internal Client", version: "3.4.0-rc3-21-gdfe9b68" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "14.04" } } 2016-11-29T14:17:44.279+0000 I - [conn18] end connection 127.0.0.1:56861 (16 connections now open) 2016-11-29T14:18:15.786+0000 I NETWORK [thread1] connection accepted from 127.0.0.1:56862 #19 (16 connections now open) 2016-11-29T14:18:15.787+0000 I NETWORK [conn19] received client metadata from 127.0.0.1:56862 conn19: { application: { name: "MongoDB Shell" }, driver: { name: "MongoDB Internal Client", version: "3.4.0-rc3-21-gdfe9b68" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "14.04" } } 2016-11-29T14:18:21.117+0000 F - [conn19] Invalid access at address: 0xa8 2016-11-29T14:18:21.134+0000 F - [conn19] Got signal: 11 (Segmentation fault). 0x7f0314e774d1 0x7f0314e765c9 0x7f0314e76c36 0x7f0312564330 0x7f03146cc811 0x7f03146cf8b9 0x7f0314664ad5 0x7f031466506f 0x7f0314713292 0x7f03144a7045 0x7f03144a723c 0x7f03144a7833 0x7f03147aaf9a 0x7f03147ab8bb 0x7f03143effbb 0x7f03143f14e9 0x7f031436930b 0x7f031436a550 0x7f0314981c7d 0x7f0314589b4d 0x7f031417a9dd 0x7f031417b31d 0x7f0314ddd242 0x7f031255c184 0x7f031228937d ----- BEGIN BACKTRACE ----- {"backtrace":[{"b":"7F03138FA000","o":"157D4D1","s":"_ZN5mongo15printStackTraceERSo"},{"b":"7F03138FA000","o":"157C5C9"},{"b":"7F03138FA000","o":"157CC36"},{"b":"7F0312554000","o":"10330"},{"b":"7F03138FA000","o":"DD2811","s":"_ZNK5mongo17ExpressionCompare16evaluateInternalEPNS_9VariablesE"},{"b":"7F03138FA000","o":"DD58B9","s":"_ZNK5mongo16ExpressionObject16evaluateInternalEPNS_9VariablesE"},{"b":"7F03138FA000","o":"D6AAD5","s":"_ZN5mongo25DocumentSourceGraphLookUp13performSearchEv"},{"b":"7F03138FA000","o":"D6B06F","s":"_ZN5mongo25DocumentSourceGraphLookUp7getNextEv"},{"b":"7F03138FA000","o":"E19292","s":"_ZN5mongo8Pipeline7getNextEv"},{"b":"7F03138FA000","o":"BAD045","s":"_ZN5mongo18PipelineProxyStage11getNextBsonEv"},{"b":"7F03138FA000","o":"BAD23C","s":"_ZN5mongo18PipelineProxyStage6doWorkEPm"},{"b":"7F03138FA000","o":"BAD833","s":"_ZN5mongo9PlanStage4workEPm"},{"b":"7F03138FA000","o":"EB0F9A","s":"_ZN5mongo12PlanExecutor11getNextImplEPNS_11SnapshottedINS_7BSONObjEEEPNS_8RecordIdE"},{"b":"7F03138FA000","o":"EB18BB","s":"_ZN5mongo12PlanExecutor7getNextEPNS_7BSONObjEPNS_8RecordIdE"},{"b":"7F03138FA000","o":"AF5FBB"},{"b":"7F03138FA000","o":"AF74E9"},{"b":"7F03138FA000","o":"A6F30B","s":"_ZN5mongo7Command3runEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS3_21ReplyBuilderInterfaceE"},{"b":"7F03138FA000","o":"A70550","s":"_ZN5mongo7Command11execCommandEPNS_16OperationContextEPS0_RKNS_3rpc16RequestInterfaceEPNS4_21ReplyBuilderInterfaceE"},{"b":"7F03138FA000","o":"1087C7D","s":"_ZN5mongo11runCommandsEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS2_21ReplyBuilderInterfaceE"},{"b":"7F03138FA000","o":"C8FB4D","s":"_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE"},{"b":"7F03138FA000","o":"8809DD","s":"_ZN5mongo23ServiceEntryPointMongod12_sessionLoopERKSt10shared_ptrINS_9transport7SessionEE"},{"b":"7F03138FA000","o":"88131D"},{"b":"7F03138FA000","o":"14E3242"},{"b":"7F0312554000","o":"8184"},{"b":"7F031218F000","o":"FA37D","s":"clone"}],"processInfo":{ "mongodbVersion" : "3.4.0-rc3-21-gdfe9b68", "gitVersion" : "dfe9b688956e19095e2d37e21bb40c7b7ad17900", "compiledModules" : [], "uname" : { "sysname" : "Linux", "release" : "3.13.0-92-generic", "version" : "#139-Ubuntu SMP Tue Jun 28 20:42:26 UTC 2016", "machine" : "x86_64" }, "somap" : [ { "b" : "7F03138FA000", "elfType" : 3, "buildId" : "EFB15FEA59BDDC105B35964BBC570A9D8804C7CB" }, { "b" : "7FFFAA0A9000", "elfType" : 3, "buildId" : "7F14688F101A2ACE5CAD23DFBFBC918616651576" }, { "b" : "7F0313476000", "path" : "/lib/x86_64-linux-gnu/libssl.so.1.0.0", "elfType" : 3, "buildId" : "74864DB9D5F69D39A67E4755012FB6573C469B3D" }, { "b" : "7F031309A000", "path" : "/lib/x86_64-linux-gnu/libcrypto.so.1.0.0", "elfType" : 3, "buildId" : "AAE7CFF8351B730830BDBCE0DCABBE06574B7144" }, { "b" : "7F0312E92000", "path" : "/lib/x86_64-linux-gnu/librt.so.1", "elfType" : 3, "buildId" : "E2A6DD5048A0A051FD61043BDB69D8CC68192AB7" }, { "b" : "7F0312C8E000", "path" : "/lib/x86_64-linux-gnu/libdl.so.2", "elfType" : 3, "buildId" : "DA9B8C234D0FE9FD8CAAC8970A7EC1B6C8F6623F" }, { "b" : "7F0312988000", "path" : "/lib/x86_64-linux-gnu/libm.so.6", "elfType" : 3, "buildId" : "D144258E614900B255A31F3FD2283A878670D5BC" }, { "b" : "7F0312772000", "path" : "/lib/x86_64-linux-gnu/libgcc_s.so.1", "elfType" : 3, "buildId" : "36311B4457710AE5578C4BF00791DED7359DBB92" }, { "b" : "7F0312554000", "path" : "/lib/x86_64-linux-gnu/libpthread.so.0", "elfType" : 3, "buildId" : "31E9F21AE8C10396171F1E13DA15780986FA696C" }, { "b" : "7F031218F000", "path" : "/lib/x86_64-linux-gnu/libc.so.6", "elfType" : 3, "buildId" : "CF699A15CAAE64F50311FC4655B86DC39A479789" }, { "b" : "7F03136D5000", "path" : "/lib64/ld-linux-x86-64.so.2", "elfType" : 3, "buildId" : "D0F537904076D73F29E4A37341F8A449E2EF6CD0" } ] }} mongod(_ZN5mongo15printStackTraceERSo+0x41) [0x7f0314e774d1] mongod(+0x157C5C9) [0x7f0314e765c9] mongod(+0x157CC36) [0x7f0314e76c36] libpthread.so.0(+0x10330) [0x7f0312564330] mongod(_ZNK5mongo17ExpressionCompare16evaluateInternalEPNS_9VariablesE+0x61) [0x7f03146cc811] mongod(_ZNK5mongo16ExpressionObject16evaluateInternalEPNS_9VariablesE+0x99) [0x7f03146cf8b9] mongod(_ZN5mongo25DocumentSourceGraphLookUp13performSearchEv+0x75) [0x7f0314664ad5] mongod(_ZN5mongo25DocumentSourceGraphLookUp7getNextEv+0x9F) [0x7f031466506f] mongod(_ZN5mongo8Pipeline7getNextEv+0x42) [0x7f0314713292] mongod(_ZN5mongo18PipelineProxyStage11getNextBsonEv+0x35) [0x7f03144a7045] mongod(_ZN5mongo18PipelineProxyStage6doWorkEPm+0x11C) [0x7f03144a723c] mongod(_ZN5mongo9PlanStage4workEPm+0x63) [0x7f03144a7833] mongod(_ZN5mongo12PlanExecutor11getNextImplEPNS_11SnapshottedINS_7BSONObjEEEPNS_8RecordIdE+0x19A) [0x7f03147aaf9a] mongod(_ZN5mongo12PlanExecutor7getNextEPNS_7BSONObjEPNS_8RecordIdE+0x4B) [0x7f03147ab8bb] mongod(+0xAF5FBB) [0x7f03143effbb] mongod(+0xAF74E9) [0x7f03143f14e9] mongod(_ZN5mongo7Command3runEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS3_21ReplyBuilderInterfaceE+0x5FB) [0x7f031436930b] mongod(_ZN5mongo7Command11execCommandEPNS_16OperationContextEPS0_RKNS_3rpc16RequestInterfaceEPNS4_21ReplyBuilderInterfaceE+0x9E0) [0x7f031436a550] mongod(_ZN5mongo11runCommandsEPNS_16OperationContextERKNS_3rpc16RequestInterfaceEPNS2_21ReplyBuilderInterfaceE+0x26D) [0x7f0314981c7d] mongod(_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0xCBD) [0x7f0314589b4d] mongod(_ZN5mongo23ServiceEntryPointMongod12_sessionLoopERKSt10shared_ptrINS_9transport7SessionEE+0x1ED) [0x7f031417a9dd] mongod(+0x88131D) [0x7f031417b31d] mongod(+0x14E3242) [0x7f0314ddd242] libpthread.so.0(+0x8184) [0x7f031255c184] libc.so.6(clone+0x6D) [0x7f031228937d] ----- END BACKTRACE ----- 2016-11-29T14:18:21.252+0000 I NETWORK [main] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed 2016-11-29T14:18:21.256+0000 I NETWORK [main] Socket recv() Connection reset by peer 127.0.0.1:27017 2016-11-29T14:18:21.256+0000 I NETWORK [main] SocketException: remote: (NONE):0 error: 9001 socket exception [RECV_ERROR] server [127.0.0.1:27017] 2016-11-29T14:18:21.256+0000 I NETWORK [main] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed
    • Query 2016-12-12
    • None
    • 3
    • None
    • None
    • None
    • None
    • None
    • None

      Have a collection "teststructure" with the following documents:

      /* 1 */
{
    "_id" : ObjectId("58077488ff3d2f357d79b86c"),
    "parent" : null,
    "name" : "New York",
    "type" : "city",
}

/* 2 */
{
    "_id" : ObjectId("58077488ff3d2f357d79b86d"),
    "parent" : ObjectId("58077488ff3d2f357d79b86c"),
    "name" : "Building One",
    "type" : "building"
}

/* 3 */
{
    "_id" : ObjectId("58077488ff3d2f357d79b86e"),
    "parent" : ObjectId("58077488ff3d2f357d79b86d"),
    "name" : "Room 1",
    "type" : "room"
}

      Have a collection "objects" with the following documents that a reference field "ts" to a document from "teststructure" collection:

      /* 1 */
{
    "_id" : ObjectId("58077488ff3d2f357d79b891"),
    "name" : "test1",
    "ts" : ObjectId("58077488ff3d2f357d79b86e"),
    "resource" : {
        "rid" : "uuid1",
        "cl" : "desks"
    }
}

/* 2 */
{
    "_id" : ObjectId("33065488ff3d2f357d70b753"),
    "name" : "test2",
    "ts" : ObjectId("58077488ff3d2f357d79b86e"),
    "resource" : {
        "rid" : "uuid2",
        "cl" : "desks"
    }
}

      The following query (which should retrive recursivelly the desks that are assigned in leaf nodes - rooms) crashes mongodb service:

      db.teststructure.aggregate([
    {
      $match: {
        "_id":  ObjectId('58077488ff3d2f357d79b86c')
      }
    },
    {
      $graphLookup: {
        from: "teststructure",
        startWith:  ObjectId('58077488ff3d2f357d79b86c'),
        connectFromField: "_id",
        connectToField: "parent",
        maxDepth: parseInt(100),
        as: "path",
        depthField: "depth"
      }
     },
     {
      $graphLookup: {
        from: "objects",
        startWith: { if: { $eq: ["$path.type", 'room'] }, then:     ObjectId('58077488ff3d2f357d79b86c'), else: "$path._id" },
        connectFromField: "_id",
        connectToField: "ts",
        maxDepth: parseInt(100),
        as: "desks",
        depthField: "depth"
       }
    }
 ])

      Run the above query and mongodb crashes. More details (about logs) in steps to reproduce.
      Then we have to manually restart mongodb server using "sudo service mongod restart".

      The problem seems to be related with the usage of the conditional operator in startWith expression from $graphLookup.

            Assignee:
            David Storch
            Reporter:
            Salinca Andreea
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              Created:
              Updated:
              Resolved: