mongodb意外地与下面的堆栈崩溃：
Sun Dec 29 11:30:43 [conn410] build index XXX { referral: 1 }
Sun Dec 29 11:30:43 [conn410] build index done 26597 records 0.056 secs
Sun Dec 29 11:30:43 Invalid access at address: 0
Sun Dec 29 11:30:43 Got signal: 11 (Segmentation fault).
Sun Dec 29 11:30:43 Backtrace:
0xa83fc9 0xa845a0 0x7fdad2200490 0x54d7dc 0x83d551 0x83d756 0x83d8b0 0x9493e3 0x8c0b66 0x8cd4b0 0x8cdb06 0x8d21ce 0x8d3be5 0x8d40e0 0x8d6200 0x94360d 0x948375 0x8823bc 0x885405 0xa96a46
/usr/bin/mongod(_ZN5mongo10abruptQuitEi+0x399) [0xa83fc9]
/usr/bin/mongod(_ZN5mongo24abruptQuitWithAddrSignalEiP7siginfoPv+0x220) [0xa845a0]
/lib64/libpthread.so.0(+0xf490) [0x7fdad2200490]
/usr/bin/mongod(_ZN5mongo24FieldRangeVectorIterator7advanceERKNS_7BSONObjE+0x4c) [0x54d7dc]
/usr/bin/mongod(_ZN5mongo11BtreeCursor29skipOutOfRangeKeysAndCheckEndEv+0x81) [0x83d551]
/usr/bin/mongod(_ZN5mongo11BtreeCursor12skipAndCheckEv+0x26) [0x83d756]
/usr/bin/mongod(_ZN5mongo11BtreeCursor7advanceEv+0x100) [0x83d8b0]
/usr/bin/mongod(_ZN5mongo8UpdateOp4nextEv+0x253) [0x9493e3]
/usr/bin/mongod(_ZN5mongo12QueryPlanSet6Runner6nextOpERNS_7QueryOpE+0x56) [0x8c0b66]
/usr/bin/mongod(_ZN5mongo12QueryPlanSet6Runner4nextEv+0x110) [0x8cd4b0]
/usr/bin/mongod(_ZN5mongo12QueryPlanSet6Runner22runUntilFirstCompletesEv+0x56) [0x8cdb06]
/usr/bin/mongod(_ZN5mongo12QueryPlanSet5runOpERNS_7QueryOpE+0x11e) [0x8d21ce]
/usr/bin/mongod(_ZN5mongo16MultiPlanScanner9runOpOnceERNS_7QueryOpE+0x525) [0x8d3be5]
/usr/bin/mongod(_ZN5mongo11MultiCursor10nextClauseEv+0x70) [0x8d40e0]
/usr/bin/mongod(_ZN5mongo11MultiCursorC1EPKcRKNS_7BSONObjES5_N5boost10shared_ptrINS0_8CursorOpEEEb+0x220) [0x8d6200]
/usr/bin/mongod(_ZN5mongo14_updateObjectsEbPKcRKNS_7BSONObjES2_bbbRNS_7OpDebugEPNS_11RemoveSaverE+0x35d) [0x94360d]
/usr/bin/mongod(_ZN5mongo13updateObjectsEPKcRKNS_7BSONObjES2_bbbRNS_7OpDebugE+0x125) [0x948375]
/usr/bin/mongod(_ZN5mongo14receivedUpdateERNS_7MessageERNS_5CurOpE+0x47c) [0x8823bc]
/usr/bin/mongod(_ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0x1105) [0x885405]
/usr/bin/mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0x76) [0xa96a46]
Logstream::get called in uninitialized state
Sun Dec 29 11:30:43 ERROR: Client::~Client _context should be null but is not; client:conn
Logstream::get called in uninitialized state
Sun Dec 29 11:30:43 ERROR: Client::shutdown not called: conn
我怎么知道导致崩溃的原因？是否有其他日志描述了更多细节？