Major - P3 The listDatabases functionality currently assumes directory structure based on what MMAP V1 is using in order to calculate sizes. This needs to be pushed inside the storage engine.
The failing repl7.js test demonstrates this:
m31001| 2014-10-07T04:15:58.950+0000 F - [conn1] Invalid access at address: 0x8
m31001| 2014-10-07T04:15:58.956+0000 F - [conn1] Got signal: 11 (Segmentation fault).
m31001|
m31001| 0xf0c959 0xf0c512 0xf0c83e 0x7f1273f72340 0x903ca0 0x955a54 0x9b5d64 0x9b6c24 0x9b76b1 0xbaa287 0xa8d004 0x7f30f0 0xebff01 0x7f1273f6a182 0x7f1272a32fbd
m31001| ----- BEGIN BACKTRACE -----
m31001| {"backtrace":[{"b":"400000","o":"B0C959"},{"b":"400000","o":"B0C512"},{"b":"400000","o":"B0C83E"},{"b":"7F1273F62000","o":"10340"},{"b":"400000","o":"503CA0"},{"b":"400000","o":"555A54"},{"b":"400000","o":"5B5D64"},{"b":"400000","o":"5B6C24"},{"b":"400000","o":"5B76B1"},{"b":"400000","o":"7AA287"},{"b":"400000","o":"68D004"},{"b":"400000","o":"3F30F0"},{"b":"400000","o":"ABFF01"},{"b":"7F1273F62000","o":"8182"},{"b":"7F1272938000","o":"FAFBD"}],"processInfo":{ "mongodbVersion" : "2.7.8-pre-", "gitVersion" : "2cb1691a38fcb83f7740b80eedfa2fe61c13d404", "uname" : { "sysname" : "Linux", "release" : "3.13.0-24-generic", "version" : "#46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014", "machine" : "x86_64" }, "somap" : [ { "elfType" : 2, "b" : "400000", "buildId" : "451B0F9519C4CDBE9B5829F6FB152D1600331926" }, { "b" : "7FFFB1EE4000", "elfType" : 3, "buildId" : "6755FAD2CADACDF1667E5B57FF1EDFC28DD1C976" }, { "b" : "7F1273F62000", "path" : "/lib/x86_64-linux-gnu/libpthread.so.0", "elfType" : 3, "buildId" : "FE662C4D7B14EE804E0C1902FB55218A106BC5CB" }, { "b" : "7F1273D04000", "path" : "/lib/x86_64-linux-gnu/libssl.so.1.0.0", "elfType" : 3, "buildId" : "CA0C4DCB4A63C439D8467DCBDBBDDF66004DEC9C" }, { "b" : "7F127392A000", "path" : "/lib/x86_64-linux-gnu/libcrypto.so.1.0.0", "elfType" : 3, "buildId" : "230EBE6145B6681D0CB7E4C9021F0D899C02E0C4" }, { "b" : "7F1273722000", "path" : "/lib/x86_64-linux-gnu/librt.so.1", "elfType" : 3, "buildId" : "92FCF41EFE012D6186E31A59AD05BDBB487769AB" }, { "b" : "7F127351E000", "path" : "/lib/x86_64-linux-gnu/libdl.so.2", "elfType" : 3, "buildId" : "C1AE4CB7195D337A77A3C689051DABAA3980CA0C" }, { "b" : "7F127321A000", "path" : "/usr/lib/x86_64-linux-gnu/libstdc++.so.6", "elfType" : 3, "buildId" : "19EFDDAB11B3BF5C71570078C59F91CF6592CE9E" }, { "b" : "7F1272F14000", "path" : "/lib/x86_64-linux-gnu/libm.so.6", "elfType" : 3, "buildId" : "574C6350381DA194C00FF555E0C1784618C05569" }, { "b" : "7F1272CFE000", "path" : "/lib/x86_64-linux-gnu/libgcc_s.so.1", "elfType" : 3, "buildId" : "CC0D578C2E0D86237CA7B0CE8913261C506A629A" }, { "b" : "7F1272938000", "path" : "/lib/x86_64-linux-gnu/libc.so.6", "elfType" : 3, "buildId" : "B515361E474796AF29DE9992B76A97CFFB39B2A7" }, { "b" : "7F1274180000", "path" : "/lib64/ld-linux-x86-64.so.2", "elfType" : 3, "buildId" : "9F00581AB3C73E3AEA35995A0C50D24D59A01D47" } ] }}
m31001| mongod(_ZN5mongo15printStackTraceERSo+0x29) [0xf0c959]
m31001| mongod(+0xB0C512) [0xf0c512]
m31001| mongod(+0xB0C83E) [0xf0c83e]
m31001| libpthread.so.0(+0x10340) [0x7f1273f72340]
m31001| mongod(_ZNK5mongo8Database23getDatabaseCatalogEntryEv+0x0) [0x903ca0]
m31001| mongod(_ZN5mongo16CmdListDatabases3runEPNS_16OperationContextERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x814) [0x955a54]
m31001| mongod(_ZN5mongo12_execCommandEPNS_16OperationContextEPNS_7CommandERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x34) [0x9b5d64]
m31001| mongod(_ZN5mongo7Command11execCommandEPNS_16OperationContextEPS0_iPKcRNS_7BSONObjERNS_14BSONObjBuilderEb+0xC84) [0x9b6c24]
m31001| mongod(_ZN5mongo12_runCommandsEPNS_16OperationContextEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x1F1) [0x9b76b1]
m31001| mongod(_ZN5mongo11newRunQueryEPNS_16OperationContextERNS_7MessageERNS_12QueryMessageERNS_5CurOpES3_b+0x1037) [0xbaa287]
m31001| mongod(_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortEb+0xDB4) [0xa8d004]
m31001| mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0xE0) [0x7f30f0]
m31001| mongod(_ZN5mongo17PortMessageServer17handleIncomingMsgEPv+0x441) [0xebff01]
m31001| libpthread.so.0(+0x8182) [0x7f1273f6a182]
m31001| libc.so.6(clone+0x6D) [0x7f1272a32fbd]