Our mongodb randomly stop working and we don't know why. We're running mongodb on:

Linux mongodb 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

Here's the error:

2014-05-14T03:52:41.478+0000 [conn181] SEVERE: Invalid access at address: 0x200694cfc2
2014-05-14T03:52:41.488+0000 [conn181] SEVERE: Got signal: 11 (Segmentation fault).
Backtrace:0x11bd301 0x11bc6de 0x11bc7cf 0x7f712e24cbb0 0x796892 0x796fbf 0x79773d 0x7979ff 0xc3d34a 0xc48ca6 0x9ffb41 0xa002d0 0xa01b5f 0xa030bd 0xa06dbe 0xa1cfda 0xa1e04e 0xa1f806 0xd4c6a7 0xb96382
/usr/bin/mongod(_ZN5mongo15printStackTraceERSo+0x21) [0x11bd301]
/usr/bin/mongod() [0x11bc6de]
/usr/bin/mongod() [0x11bc7cf]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfbb0) [0x7f712e24cbb0]
/usr/bin/mongod(_ZNK5mongo11mutablebson8Document4Impl12writeElementINS_16BSONArrayBuilderEEEvjPT_PKNS_10StringDataE+0x52) [0x796892]
/usr/bin/mongod(ZNK5mongo11mutablebson8Document4Impl13writeChildrenINS_16BSONArrayBuilderEEEvjPT+0x4f) [0x796fbf]
/usr/bin/mongod(_ZNK5mongo11mutablebson8Document4Impl12writeElementINS_14BSONObjBuilderEEEvjPT_PKNS_10StringDataE+0x22d) [0x79773d]
/usr/bin/mongod(ZNK5mongo11mutablebson8Document4Impl13writeChildrenINS_14BSONObjBuilderEEEvjPT+0x4f) [0x7979ff]
/usr/bin/mongod(_ZN5mongo6updateERKNS_13UpdateRequestEPNS_7OpDebugEPNS_12UpdateDriverEPNS_14CanonicalQueryE+0x115a) [0xc3d34a]
/usr/bin/mongod(_ZN5mongo14UpdateExecutor7executeEv+0x66) [0xc48ca6]
/usr/bin/mongod() [0x9ffb41]
/usr/bin/mongod(_ZN5mongo18WriteBatchExecutor10execUpdateERKNS_12BatchItemRefEPNS_7BSONObjEPPNS_16WriteErrorDetailE+0x80) [0xa002d0]
/usr/bin/mongod(_ZN5mongo18WriteBatchExecutor11bulkExecuteERKNS_21BatchedCommandRequestEPSt6vectorIPNS_19BatchedUpsertDetailESaIS6_EEPS4_IPNS_16WriteErrorDetailESaISB_EE+0x1df) [0xa01b5f]
/usr/bin/mongod(_ZN5mongo18WriteBatchExecutor12executeBatchERKNS_21BatchedCommandRequestEPNS_22BatchedCommandResponseE+0x8cd) [0xa030bd]
/usr/bin/mongod(_ZN5mongo8WriteCmd3runERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x3de) [0xa06dbe]
/usr/bin/mongod(_ZN5mongo12_execCommandEPNS_7CommandERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x3a) [0xa1cfda]
/usr/bin/mongod(_ZN5mongo7Command11execCommandEPS0_RNS_6ClientEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb+0xd5e) [0xa1e04e]
/usr/bin/mongod(_ZN5mongo12_runCommandsEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x6c6) [0xa1f806]
/usr/bin/mongod(ZN5mongo11newRunQueryERNS_7MessageERNS_12QueryMessageERNS_5CurOpES1+0x2307) [0xd4c6a7]
/usr/bin/mongod() [0xb96382]
2014-05-14T07:01:37.807+0000 ***** SERVER RESTARTED *****