m30000| Wed Feb 20 15:19:17.892 [conn1] CMD: drop test.tmp.mr.mr_5_inc
 m30000| Wed Feb 20 15:19:17.892 Invalid access at address: 0 from thread: conn1
 m30000| 
 m30000| Wed Feb 20 15:19:17.892 Got signal: 11 (Segmentation fault).
 m30000| 
 m30000| Wed Feb 20 15:19:17.898 Backtrace:
 m30000| 0xb8a653 0x7863c0 0x786774 0x382b00efe0 0xca0d08 0xb48802 0x89a00e 0x8a09e5 0x8bcac4 0x8bdb20 0x8be63a 0x9afee5 0x9b2d51 0x967e16 0x79794b 0xb7a4cc 0x382b007d14 0x382acf168d 
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo15printStackTraceERSo+0x23) [0xb8a653]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo10abruptQuitEi+0x100) [0x7863c0]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo24abruptQuitWithAddrSignalEiP7siginfoPv+0x104) [0x786774]
 m30000|  /lib64/libpthread.so.0() [0x382b00efe0]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN2v88Function4CallENS_6HandleINS_6ObjectEEEiPNS1_INS_5ValueEEE+0x28) [0xca0d08]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo7V8Scope6invokeEyPKNS_7BSONObjES3_ibbb+0x532) [0xb48802]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo2mr5StateD1Ev+0x8e) [0x89a00e]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo2mr16MapReduceCommand3runERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x10f5) [0x8a09e5]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo12_execCommandEPNS_7CommandERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x34) [0x8bcac4]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo7Command11execCommandEPS0_RNS_6ClientEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb+0x5e0) [0x8bdb20]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo12_runCommandsEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x3ca) [0x8be63a]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo11runCommandsEPKcRNS_7BSONObjERNS_5CurOpERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x35) [0x9afee5]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo8runQueryERNS_7MessageERNS_12QueryMessageERNS_5CurOpES1_+0x841) [0x9b2d51]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0x6e6) [0x967e16]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0x8b) [0x79794b]
 m30000|  /media/DATA0/data/m/5706/mongo/mongod(_ZN5mongo17PortMessageServer17handleIncomingMsgEPv+0x31c) [0xb7a4cc]
 m30000|  /lib64/libpthread.so.0() [0x382b007d14]
 m30000|  /lib64/libc.so.6(clone+0x6d) [0x382acf168d]