Show
Mongo shell repo steps with results:
> db.version()
4.2.2
> db.createCollection( 'test_map_ne' )> db.createCollection( 'test_map_ne' ){ "ok" : 1 }> db.test_map_ne.insert([{key: 'one' , val: 1}, {key: 'two' , val: 2}])BulkWriteResult({ "writeErrors" : [ ], "writeConcernErrors" : [ ], "nInserted" : 2, "nUpserted" : 0, "nMatched" : 0, "nModified" : 0, "nRemoved" : 0, "upserted" : [ ]})> db.test_map_ne.find({}){ "_id" : ObjectId( "5df7c48074a7e8d75b9f2ea6" ), "key" : "one" , "val" : 1 }{ "_id" : ObjectId( "5df7c48074a7e8d75b9f2ea7" ), "key" : "two" , "val" : 2 }> db.test_map_ne.find({key: {$ne: 'one' }}){ "_id" : ObjectId( "5df7c48074a7e8d75b9f2ea7" ), "key" : "two" , "val" : 2 }> var mapper = function() {emit( this ._id, this .val);};> var reducer = function(k, v) { return Array.sum(v);};> db.test_map_ne.mapReduce(mapper, reducer, {out: {inline: 1}, query: {}}){ "results" : [ { "_id" : ObjectId( "5df7c48074a7e8d75b9f2ea6" ), "value" : 1 }, { "_id" : ObjectId( "5df7c48074a7e8d75b9f2ea7" ), "value" : 2 } ], "timeMillis" : 24, "counts" : { "input" : 2, "emit" : 2, "reduce" : 0, "output" : 2 }, "ok" : 1}> db.test_map_ne.mapReduce(mapper, reducer, {out: {inline: 1}, query: {key: {$ne: 'one' }}})2019-12-16T19:56:10.707+0200 I NETWORK [js] DBClientConnection failed to receive message from 127.0.0.1:27017 - HostUnreachable: Connection closed by peer2019-12-16T19:56:10.707+0200 E QUERY [js] uncaught exception: Error: error doing query: failed: network error while attempting to run command 'mapreduce' on host '127.0.0.1:27017' :DB.prototype.runCommand@src/mongo/shell/db.js:169:19DB.prototype.runReadCommand@src/mongo/shell/db.js:141:12DBCollection.prototype.mapReduce@src/mongo/shell/collection.js:1078:15@(shell):1:1>
Backtrace:
----- BEGIN BACKTRACE -----
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, "s" : "_ZN5mongo19ServiceStateMachine15_sourceCallbackENS_6StatusE" },{ "b" : "55E96C4B4000" , "o" : "113E167" , "s" : "_ZN5mongo19ServiceStateMachine14_sourceMessageENS0_11ThreadGuardE" },{ "b" : "55E96C4B4000" , "o" : "113EFFB" , "s" : "_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE" },{ "b" : "55E96C4B4000" , "o" : "114232C" },{ "b" : "55E96C4B4000" , "o" : "1F4567B" },{ "b" : "55E96C4B4000" , "o" : "2589454" },{ "b" : "7F74BB793000" , "o" : "7E65" },{ "b" : "7F74BB3C5000" , "o" : "FE88D" , "s" : "clone" }], "processInfo" :{ "mongodbVersion" : "4.2.2" , "gitVersion" : "a0bbbff6ada159e19298d37946ac8dc4b497eadf" , "compiledModules" : [], "uname" : { "sysname" : "Linux" , "release" : "3.10.0-1062.4.3.el7.x86_64" , "version" : "#1 SMP Wed Nov 13 23:58:53 UTC 2019" , "machine" : "x86_64" }, "somap" : [ { "b" : "55E96C4B4000" , "elfType" : 3, "buildId" : "67F0B211856C5980A144552C72D5392B3453718F" }, { "b" : "7FFE5D811000" , "elfType" : 3, "buildId" : 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mongod(_ZN5mongo15printStackTraceERSo+0x41) [0x55e96ecb3a01]
mongod(+0x27FF1FE) [0x55e96ecb31fe]
mongod(+0x27FF3DC) [0x55e96ecb33dc]
mongod(+0x1DFFE74) [0x55e96e2b3e74]
libpthread.so.0(+0xF5F0) [0x7f74bb7a25f0]
mongod(+0x123690C) [0x55e96d6ea90c]
mongod(_ZN5mongo2mr16MapReduceCommand9errmsgRunEPNS_16OperationContextERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS_7BSONObjERS9_RNS_14BSONObjBuilderE+0x6B3) [0x55e96d6ec6b3]
mongod(_ZN5mongo23ErrmsgCommandDeprecated3runEPNS_16OperationContextERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS_7BSONObjERNS_14BSONObjBuilderE+0x46) [0x55e96e6b1276]
mongod(_ZN5mongo12BasicCommand10Invocation3runEPNS_16OperationContextEPNS_3rpc21ReplyBuilderInterfaceE+0x74) [0x55e96e6b6dc4]
mongod(+0x1146498) [0x55e96d5fa498]
mongod(+0x1148984) [0x55e96d5fc984]
mongod(_ZN5mongo23ServiceEntryPointCommon13handleRequestEPNS_16OperationContextERKNS_7MessageERKNS0_5HooksE+0x41A) [0x55e96d5fd6ea]
mongod(_ZN5mongo23ServiceEntryPointMongod13handleRequestEPNS_16OperationContextERKNS_7MessageE+0x3C) [0x55e96d5eb31c]
mongod(_ZN5mongo19ServiceStateMachine15_processMessageENS0_11ThreadGuardE+0xEC) [0x55e96d5f789c]
mongod(_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE+0x17F) [0x55e96d5f309f]
mongod(+0x114232C) [0x55e96d5f632c]
mongod(_ZN5mongo9transport26ServiceExecutorSynchronous8scheduleESt8functionIFvvEENS0_15ServiceExecutor13ScheduleFlagsENS0_23ServiceExecutorTaskNameE+0x182) [0x55e96e3f9212]
mongod(_ZN5mongo19ServiceStateMachine22_scheduleNextWithGuardENS0_11ThreadGuardENS_9transport15ServiceExecutor13ScheduleFlagsENS2_23ServiceExecutorTaskNameENS0_9OwnershipE+0x10D) [0x55e96d5f0a9d]
mongod(_ZN5mongo19ServiceStateMachine15_sourceCallbackENS_6StatusE+0x843) [0x55e96d5f3d53]
mongod(_ZN5mongo19ServiceStateMachine14_sourceMessageENS0_11ThreadGuardE+0x2E7) [0x55e96d5f2167]
mongod(_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE+0xDB) [0x55e96d5f2ffb]
mongod(+0x114232C) [0x55e96d5f632c]
mongod(+0x1F4567B) [0x55e96e3f967b]
mongod(+0x2589454) [0x55e96ea3d454]
libpthread.so.0(+0x7E65) [0x7f74bb79ae65]
libc.so.6(clone+0x6D) [0x7f74bb4c388d]
----- END BACKTRACE -----
SERVER-38776 Invalid access at address: 0 Got signal: 11 (Segmentation fault).
SERVER-45281 Reduce danger of MatchExpression::getChildVector() or remove it