1. Start a sharded cluster (doesn't seem to matter setup much, so I started the simplest: 1 config, 1 mongos, 2 shards, each a standalone). $ mkdir /data/test2 $ mlaunch init --single --dir /data/test2 --binarypath=. --sharded 2 --config 1 --mongos 1 --port 30000 launching: ./mongod on port 30001 launching: ./mongod on port 30002 launching: config server on port 30003 launching: ./mongos on port 30000 adding shards. 2. Insert some documents (note: doesn't crash unless some documents exist before next steps) $ ./mongo --port 30000 MongoDB shell version: 2.8.0-rc3-pre- connecting to: 127.0.0.1:30000/test mongos> for (var i = 0; i < 1000; i += 1) { db.foo.insert({i: i}) } WriteResult({ "nInserted" : 1 }) 3. Shard that collection. mongos> db.foo.ensureIndex({i: 1}) { "raw" : { "charlie-macbook-pro:30001" : { "createdCollectionAutomatically" : false, "numIndexesBefore" : 1, "numIndexesAfter" : 2, "ok" : 1 } }, "ok" : 1 } mongos> use admin switched to db admin mongos> db.runCommand({enableSharding: 'test.foo'}) { "ok" : 1 } mongos> db.runCommand({shardCollection: 'test.foo', key: {i: 1}}) { "collectionsharded" : "test.foo", "ok" : 1 } 4. Insert some more documents, but interrupt the for loop mongos> use test switched to db test mongos> for (var i = 1000; i < 5000; i += 1) { db.foo.insert({i: i}) } 5. Crash ^C2015-01-16T11:14:41.763-0500 I - Assertion: 13111:field not found, expected type 2 2015-01-16T11:14:41.766-0500 I CONTROL 0x10cf72a7a 0x10cf2614e 0x10cf13762 0x10cf1360a 0x10cdbce9c 0x10cdba691 0x10cf06661 0x10cdb47dd 0x10cdb4829 0x7fff9a99ef1a 0x10d20106b 0x10cf2e22d 0x10cf2efe2 0x10ce059c6 0x10ce18de3 0x10ce00d73 0x10ce07504 0x10ced6db3 0x10cec94e2 0x35379a0780f9 0x35379a0a8bbb 0x35379a0613a9 0x35379a060783 0x35379a054b05 0x35379a00c7ee ----- BEGIN BACKTRACE ----- {"backtrace":[{"b":"10CDB3000","o":"1BFA7A"},{"b":"10CDB3000","o":"17314E"},{"b":"10CDB3000","o":"160762"},{"b":"10CDB3000","o":"16060A"},{"b":"10CDB3000","o":"9E9C"},{"b":"10CDB3000","o":"7691"},{"b":"10CDB3000","o":"153661"},{"b":"10CDB3000","o":"17DD"},{"b":"10CDB3000","o":"1829"},{"b":"7FFF9A99A000","o":"4F1A"},{"b":"10CDB3000","o":"44E06B"},{"b":"10CDB3000","o":"17B22D"},{"b":"10CDB3000","o":"17BFE2"},{"b":"10CDB3000","o":"529C6"},{"b":"10CDB3000","o":"65DE3"},{"b":"10CDB3000","o":"4DD73"},{"b":"10CDB3000","o":"54504"},{"b":"10CDB3000","o":"123DB3"},{"b":"10CDB3000","o":"1164E2"},{"b":"0","o":"35379A0780F9"},{"b":"0","o":"35379A0A8BBB"},{"b":"0","o":"35379A0613A9"},{"b":"0","o":"35379A060783"},{"b":"0","o":"35379A054B05"},{"b":"0","o":"35379A00C7EE"}],"processInfo":{ "mongodbVersion" : "2.8.0-rc3-pre-", "gitVersion" : "de16932890952898881673fdd76c5f45d6dc49e1", "uname" : { "sysname" : "Darwin", "release" : "14.0.0", "version" : "Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64", "machine" : "x86_64" }, "somap" : [ { "path" : "/Users/charlie/github/mongo/./mongo", "machType" : 2, "b" : "10CDB3000", "buildId" : "B859FB1969F43AC0AD324A464C6E9175" }, { "path" : "/usr/lib/libSystem.B.dylib", "machType" : 6, "b" : "7FFF8EB3C000", "buildId" : "DA954461EC6A3DF085516FC810627627" }, { "path" : "/usr/lib/libc++.1.dylib", "machType" : 6, "b" : "7FFF96327000", "buildId" : "1B9530FD989B3174BB1CBDC159501710" }, { "path" : "/usr/lib/system/libcache.dylib", "machType" : 6, "b" : "7FFF98C1C000", "buildId" : "45E9A2E799C436B2BEE30C4E11614AD1" }, { "path" : "/usr/lib/system/libcommonCrypto.dylib", "machType" : 6, "b" : "7FFF9A5D1000", "buildId" : "D381EBC669D831D380845A80A32CB748" }, { "path" : "/usr/lib/system/libcompiler_rt.dylib", "machType" : 6, "b" : "7FFF948BE000", "buildId" : "BF8FC133EE103DA69B9092039E28678F" }, { "path" : "/usr/lib/system/libcopyfile.dylib", "machType" : 6, "b" : "7FFF8E4F1000", "buildId" : 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"/usr/lib/system/libunc.dylib", "machType" : 6, "b" : "7FFF90754000", "buildId" : "5676F7EAC1DF329FB006D2C3022B7D70" }, { "path" : "/usr/lib/system/libunwind.dylib", "machType" : 6, "b" : "7FFF8B745000", "buildId" : "BE7E51A0B6EA3A549CCA9D88F683A6D6" }, { "path" : "/usr/lib/system/libxpc.dylib", "machType" : 6, "b" : "7FFF922F5000", "buildId" : "9437C02EA07B38C891CB299FAA63083D" }, { "path" : "/usr/lib/libobjc.A.dylib", "machType" : 6, "b" : "7FFF98D3D000", "buildId" : "3B60CD9074A23A5D9686B0772159792A" }, { "path" : "/usr/lib/libauto.dylib", "machType" : 6, "b" : "7FFF8CBFB000", "buildId" : "A260789BD4D8316A9490254767B8A5F1" }, { "path" : "/usr/lib/libc++abi.dylib", "machType" : 6, "b" : "7FFF91E4D000", "buildId" : "88A22A0F87C63002BFBAAC0F2808B8B9" }, { "path" : "/usr/lib/libDiagnosticMessagesClient.dylib", "machType" : 6, "b" : "7FFF90B8F000", "buildId" : "2EE8E4365CDC34C599595BA218D507FB" } ] }} mongo(_ZN5mongo15printStackTraceERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEE+0x3A) [0x10cf72a7a] mongo(_ZN5mongo10logContextEPKc+0x10E) [0x10cf2614e] mongo(_ZN5mongo11msgassertedEiPKc+0x152) [0x10cf13762] mongo(_ZN5mongo11msgassertedEiRKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE+0x1A) [0x10cf1360a] mongo(_ZNK5mongo11BSONElement3chkEi+0x35C) [0x10cdbce9c] mongo(_ZNK5mongo11BSONElement6StringEv+0x21) [0x10cdba691] mongo(_ZNK5mongo11shell_utils18ConnectionRegistry30killOperationsOnAllConnectionsEb+0x391) [0x10cf06661] mongo(_ZN5mongo11exitCleanlyENS_8ExitCodeE+0x6D) [0x10cdb47dd] mongo(_Z10quitNicelyi+0x9) [0x10cdb4829] libsystem_platform.dylib(_sigtramp+0x1A) [0x7fff9a99ef1a] mongo(_ZN2v88internal6Parser26ParseConditionalExpressionEbPb+0x2B) [0x10d20106b] mongo(_ZN5mongo13MessagingPort4recvERNS_7MessageE+0x7D) [0x10cf2e22d] mongo(_ZN5mongo13MessagingPort4recvERKNS_7MessageERS1_+0x22) [0x10cf2efe2] mongo(_ZN5mongo18DBClientConnection4callERNS_7MessageES2_bPNSt3__112basic_stringIcNS3_11char_traitsIcEENS3_9allocatorIcEEEE+0x46) [0x10ce059c6] mongo(_ZN5mongo14DBClientCursor4initEv+0x93) [0x10ce18de3] mongo(_ZN5mongo12DBClientBase5queryERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEENS_5QueryEiiPKNS_7BSONObjEii+0xA3) [0x10ce00d73] mongo(_ZN5mongo18DBClientConnection5queryERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEENS_5QueryEiiPKNS_7BSONObjEii+0x84) [0x10ce07504] mongo(_ZN5mongo9mongoFindEPNS_7V8ScopeERKN2v89ArgumentsE+0x2C3) [0x10ced6db3] mongo(_ZN5mongo7V8Scope10v8CallbackERKN2v89ArgumentsE+0x52) [0x10cec94e2] ??? [0x35379a0780f9] ??? [0x35379a0a8bbb] ??? [0x35379a0613a9] ??? [0x35379a060783] ??? [0x35379a054b05] ??? [0x35379a00c7ee] ----- END BACKTRACE ----- 2015-01-16T11:14:41.768-0500 F - terminate() called. An exception is active; attempting to gather more information 2015-01-16T11:14:41.771-0500 F - DBException::toString(): 13111 field not found, expected type 2 Actual exception type: mongo::MsgAssertionException 0x10cf72a7a 0x10cf72172 0x7fff91e730a1 0x7fff91e72b30 0x10cf137f7 0x10cf1360a 0x10cdbce9c 0x10cdba691 0x10cf06661 0x10cdb47dd 0x10cdb4829 0x7fff9a99ef1a 0x10d20106b 0x10cf2e22d 0x10cf2efe2 0x10ce059c6 0x10ce18de3 0x10ce00d73 0x10ce07504 0x10ced6db3 0x10cec94e2 0x35379a0780f9 0x35379a0a8bbb 0x35379a0613a9 0x35379a060783 0x35379a054b05 0x35379a00c7ee ----- BEGIN BACKTRACE ----- {"backtrace":[{"b":"10CDB3000","o":"1BFA7A"},{"b":"10CDB3000","o":"1BF172"},{"b":"7FFF91E4D000","o":"260A1"},{"b":"7FFF91E4D000","o":"25B30"},{"b":"10CDB3000","o":"1607F7"},{"b":"10CDB3000","o":"16060A"},{"b":"10CDB3000","o":"9E9C"},{"b":"10CDB3000","o":"7691"},{"b":"10CDB3000","o":"153661"},{"b":"10CDB3000","o":"17DD"},{"b":"10CDB3000","o":"1829"},{"b":"7FFF9A99A000","o":"4F1A"},{"b":"10CDB3000","o":"44E06B"},{"b":"10CDB3000","o":"17B22D"},{"b":"10CDB3000","o":"17BFE2"},{"b":"10CDB3000","o":"529C6"},{"b":"10CDB3000","o":"65DE3"},{"b":"10CDB3000","o":"4DD73"},{"b":"10CDB3000","o":"54504"},{"b":"10CDB3000","o":"123DB3"},{"b":"10CDB3000","o":"1164E2"},{"b":"0","o":"35379A0780F9"},{"b":"0","o":"35379A0A8BBB"},{"b":"0","o":"35379A0613A9"},{"b":"0","o":"35379A060783"},{"b":"0","o":"35379A054B05"},{"b":"0","o":"35379A00C7EE"}],"processInfo":{ "mongodbVersion" : "2.8.0-rc3-pre-", "gitVersion" : "de16932890952898881673fdd76c5f45d6dc49e1", "uname" : { "sysname" : "Darwin", "release" : "14.0.0", "version" : "Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64", "machine" : "x86_64" }, "somap" : [ { "path" : "/Users/charlie/github/mongo/./mongo", "machType" : 2, "b" : "10CDB3000", "buildId" : "B859FB1969F43AC0AD324A464C6E9175" }, { "path" : "/usr/lib/libSystem.B.dylib", "machType" : 6, "b" : "7FFF8EB3C000", "buildId" : "DA954461EC6A3DF085516FC810627627" }, { "path" : "/usr/lib/libc++.1.dylib", "machType" : 6, "b" : "7FFF96327000", "buildId" : "1B9530FD989B3174BB1CBDC159501710" }, { "path" : "/usr/lib/system/libcache.dylib", "machType" : 6, "b" : "7FFF98C1C000", "buildId" : "45E9A2E799C436B2BEE30C4E11614AD1" }, { "path" : "/usr/lib/system/libcommonCrypto.dylib", "machType" : 6, "b" : "7FFF9A5D1000", "buildId" : "D381EBC669D831D380845A80A32CB748" }, { "path" : "/usr/lib/system/libcompiler_rt.dylib", "machType" : 6, "b" : "7FFF948BE000", "buildId" : "BF8FC133EE103DA69B9092039E28678F" }, { "path" : "/usr/lib/system/libcopyfile.dylib", "machType" : 6, "b" : "7FFF8E4F1000", "buildId" : "0C68D3A6ACDD3EF3991ACC82C32AB836" }, { "path" : "/usr/lib/system/libcorecrypto.dylib", "machType" : 6, "b" : "7FFF8B689000", "buildId" : "E178980139853949B7366B3378873301" }, { "path" : "/usr/lib/system/libdispatch.dylib", "machType" : 6, "b" : "7FFF8FA05000", "buildId" : "502CF32B669B3709886208188225E4F0" }, { "path" : "/usr/lib/system/libdyld.dylib", "machType" : 6, "b" : "7FFF900F9000", "buildId" : "19FAF435C16533749DEFD7BBA7D61DB6" }, { "path" : "/usr/lib/system/libkeymgr.dylib", "machType" : 6, "b" : "7FFF8FA30000", "buildId" : "77845842DE703CC5BD01C3D14227CED5" }, { "path" : "/usr/lib/system/liblaunch.dylib", "machType" : 6, "b" : "7FFF8E1D0000", "buildId" : "8A9889248BE735FEBF7D322E90EFE49E" }, { "path" : "/usr/lib/system/libmacho.dylib", "machType" : 6, "b" : "7FFF9A7C4000", "buildId" : "126CA2EDDE91308F8881B9DAEC3C63B6" }, { "path" : "/usr/lib/system/libquarantine.dylib", "machType" : 6, "b" : "7FFF9A02B000", "buildId" : 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mongo(_ZN5mongo15printStackTraceERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEE+0x3A) [0x10cf72a7a] mongo(_ZN5mongo12_GLOBAL__N_111myTerminateEv+0x282) [0x10cf72172] libc++abi.dylib(_ZSt11__terminatePFvvE+0x8) [0x7fff91e730a1] libc++abi.dylib(_ZN10__cxxabiv1L22exception_cleanup_funcE19_Unwind_Reason_CodeP17_Unwind_Exception+0x0) [0x7fff91e72b30] mongo(_ZN5mongo11msgassertedEiPKc+0x1E7) [0x10cf137f7] mongo(_ZN5mongo11msgassertedEiRKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE+0x1A) [0x10cf1360a] mongo(_ZNK5mongo11BSONElement3chkEi+0x35C) [0x10cdbce9c] mongo(_ZNK5mongo11BSONElement6StringEv+0x21) [0x10cdba691] mongo(_ZNK5mongo11shell_utils18ConnectionRegistry30killOperationsOnAllConnectionsEb+0x391) [0x10cf06661] mongo(_ZN5mongo11exitCleanlyENS_8ExitCodeE+0x6D) [0x10cdb47dd] mongo(_Z10quitNicelyi+0x9) [0x10cdb4829] libsystem_platform.dylib(_sigtramp+0x1A) [0x7fff9a99ef1a] mongo(_ZN2v88internal6Parser26ParseConditionalExpressionEbPb+0x2B) [0x10d20106b] mongo(_ZN5mongo13MessagingPort4recvERNS_7MessageE+0x7D) [0x10cf2e22d] mongo(_ZN5mongo13MessagingPort4recvERKNS_7MessageERS1_+0x22) [0x10cf2efe2] mongo(_ZN5mongo18DBClientConnection4callERNS_7MessageES2_bPNSt3__112basic_stringIcNS3_11char_traitsIcEENS3_9allocatorIcEEEE+0x46) [0x10ce059c6] mongo(_ZN5mongo14DBClientCursor4initEv+0x93) [0x10ce18de3] mongo(_ZN5mongo12DBClientBase5queryERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEENS_5QueryEiiPKNS_7BSONObjEii+0xA3) [0x10ce00d73] mongo(_ZN5mongo18DBClientConnection5queryERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEENS_5QueryEiiPKNS_7BSONObjEii+0x84) [0x10ce07504] mongo(_ZN5mongo9mongoFindEPNS_7V8ScopeERKN2v89ArgumentsE+0x2C3) [0x10ced6db3] mongo(_ZN5mongo7V8Scope10v8CallbackERKN2v89ArgumentsE+0x52) [0x10cec94e2] ??? [0x35379a0780f9] ??? [0x35379a0a8bbb] ??? [0x35379a0613a9] ??? [0x35379a060783] ??? [0x35379a054b05] ??? [0x35379a00c7ee] ----- END BACKTRACE -----