2015-05-04T16:28:54.660-0400 W -        [initandlisten] Detected unclean shutdown - /data/wiredTiger/mongod.lock is not empty.
2015-05-04T16:28:54.660-0400 W STORAGE  [initandlisten] Recovering data from the last clean checkpoint.
2015-05-04T16:28:54.661-0400 I STORAGE  [initandlisten] wiredtiger_open config:create,cache_size=1G,session_max=20000,eviction=(threads_max=4),statistics=(fast),log(enabled=true,archive=true,path=journal,compressor=none),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),
2015-05-04T16:29:31.728-0400 E STORAGE  [initandlisten] WiredTiger (-31802) [1430771371:728175][1371:0x7f39f5c34b80], file:collection-0--5195437846436728971.wt, WT_SESSION.open_cursor: collection-0--5195437846436728971.wt read error: failed to read 4096 bytes at offset 40960: WT_ERROR: non-specific WiredTiger error
2015-05-04T16:29:31.728-0400 I -        [initandlisten] Invariant failure: ret resulted in status UnknownError-31802:WT_ERROR: non-specific WiredTiger error at src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp 80
2015-05-04T16:29:31.778-0400 I CONTROL  [initandlisten] 0xf4ba16 0xeee0f8 0xed1ee5 0xd6a66d 0xd65a5b 0xd5f824 0xd5ff13 0xd60216 0xd5a404 0xcdbf86 0xcdffa9 0xd5940c 0xcaa860 0x8291ce 0x7ed989 0x7f39f4205ec5 0x8272f7
----- BEGIN BACKTRACE -----
{"backtrace":[{"b":"400000","o":"B4BA16"},{"b":"400000","o":"AEE0F8"},{"b":"400000","o":"AD1EE5"},{"b":"400000","o":"96A66D"},{"b":"400000","o":"965A5B"},{"b":"400000","o":"95F824"},{"b":"400000","o":"95FF13"},{"b":"400000","o":"960216"},{"b":"400000","o":"95A404"},{"b":"400000","o":"8DBF86"},{"b":"400000","o":"8DFFA9"},{"b":"400000","o":"95940C"},{"b":"400000","o":"8AA860"},{"b":"400000","o":"4291CE"},{"b":"400000","o":"3ED989"},{"b":"7F39F41E4000","o":"21EC5"},{"b":"400000","o":"4272F7"}],"processInfo":{ "mongodbVersion" : "3.1.2", "gitVersion" : "aa0066050f0a9db81aa47181d0fbd18c109ae991", "uname" : { "
sysname" : "Linux", "release" : "3.16.0-31-generic", "version" : "#41~14.04.1-Ubuntu SMP Wed Feb 11 19:30:13 UTC 2015", "machine" : "x86_64" }, "somap" : [ { "elfType" : 2, "b" : "400000", "buildId" : "5A1AB53E82C3717157B58AE3409311D6B24478D5" }, { "b" : "7FFFFE5DB000", "elfType" : 3, "buildId" : "5552B9335DDE9349419BA10896C1E75C9432A946" }, { "b" : "7F39F57CD000", "path" : "/lib/x86_64-linux-gnu/libssl.so.1.0.0", "elfType" : 3, "buildId" : "FF43D0947510134A8A494063A3C1CF3CEBB27791" }, { "b" : "7F39F53F3000", "path" : "/lib/x86_64-linux-gnu/libcrypto.so.1.0.0", "elfType" : 3, "buildId" : "379F80D2768BA6A21F52781895EE9F47B34A0A85" }, { "b" : "7F39F51EB000", "path" : "/lib/x86_64-linux-gnu/librt.so.1", "elfType" : 3, "buildId" : "92FCF41EFE012D6186E31A59AD05BDBB487769AB" }, { "b" : "7F39F4FE7000", "path" : "/lib/x86_64-linux-gnu/libdl.so.2", "elfType" : 3, "buildId" : "C1AE4CB7195D337A77A3C689051DABAA3980CA0C" }, { "b" : "7F39F4CE3000", "path" : "/usr/lib/x86_64-linux-gnu/libstdc++.so.6", "elfType" : 3, "buildId" : "19EFDDAB11B3BF5C71570078C59F91CF6592CE9E" }, { "b" : "7F39F49DD000", "path" : "/lib/x86_64-linux-gnu/libm.so.6", "elfType" : 3, "buildId" : "1D76B71E905CB867B27CEF230FCB20F01A3178F5" }, { "b" : "7F39F47C7000", "path" : "/lib/x86_64-linux-gnu/libgcc_s.so.1", "elfType" : 3, "buildId" : "8D0AA71411580EE6C08809695C3984769F25725B" }, { "b" : "7F39F45A9000", "path" : "/lib/x86_64-linux-gnu/libpthread.so.0", "elfType" : 3, "buildId" : "9318E8AF0BFBE444731BB0461202EF57F7C39542" }, { "b" : "7F39F41E4000", "path" : "/lib/x86_64-linux-gnu/libc.so.6", "elfType" : 3, "buildId" : "30C94DC66A1FE95180C3D68D2B89E576D5AE213C" }, { "b" : "7F39F5A2B000", "path" : "/lib64/ld-linux-x86-64.so.2", "elfType" : 3, "buildId" : "9F00581AB3C73E3AEA35995A0C50D24D59A01D47" } ] }}
 mongod(_ZN5mongo15printStackTraceERSo+0x26) [0xf4ba16]
 mongod(_ZN5mongo10logContextEPKc+0x138) [0xeee0f8]
 mongod(_ZN5mongo17invariantOKFailedEPKcRKNS_6StatusES1_j+0xA5) [0xed1ee5]
 mongod(_ZN5mongo17WiredTigerSession9getCursorERKSsmb+0x1FD) [0xd6a66d]
 mongod(_ZN5mongo16WiredTigerCursorC1ERKSsmbPNS_16OperationContextE+0x4B) [0xd65a5b]
 mongod(_ZN5mongo21WiredTigerRecordStore8IteratorC2ERKS0_PNS_16OperationContextERKNS_8RecordIdERKNS_20CollectionScanParams9DirectionEb+0x64) [0xd5f824]
 mongod(_ZNK5mongo21WiredTigerRecordStore11getIteratorEPNS_16OperationContextERKNS_8RecordIdERKNS_20CollectionScanParams9DirectionE+0x43) [0xd5ff13]
 mongod(_ZN5mongo21WiredTigerRecordStoreC1EPNS_16OperationContextENS_10StringDataES3_bllPNS_28CappedDocumentDeleteCallbackEPNS_20WiredTigerSizeStorerE+0x2B6) [0xd60216]
 mongod(_ZN5mongo18WiredTigerKVEngine14getRecordStoreEPNS_16OperationContextENS_10StringDataES3_RKNS_17CollectionOptionsE+0xC4) [0xd5a404]
 mongod(_ZN5mongo22KVDatabaseCatalogEntry14initCollectionEPNS_16OperationContextERKSsb+0x1D6) [0xcdbf86]
 mongod(_ZN5mongo15KVStorageEngineC1EPNS_8KVEngineERKNS_22KVStorageEngineOptionsE+0x579) [0xcdffa9]
 mongod(+0x95940C) [0xd5940c]
 mongod(_ZN5mongo20ServiceContextMongoD22setGlobalStorageEngineERKSs+0x350) [0xcaa860]
 mongod(_ZN5mongo13initAndListenEi+0x3EE) [0x8291ce]
 mongod(main+0x139) [0x7ed989]
 libc.so.6(__libc_start_main+0xF5) [0x7f39f4205ec5]
 mongod(+0x4272F7) [0x8272f7]
-----  END BACKTRACE  -----
2015-05-04T16:29:31.778-0400 I -        [initandlisten]

***aborting after invariant() failure