mongodb doesn't start

***** SERVER RESTARTED *****


Tue Feb 24 14:53:59.722 [initandlisten] MongoDB starting : pid=28093 port=27017 dbpath=/var/lib/mongodb 64-bit host=cs19081
Tue Feb 24 14:53:59.722 [initandlisten] db version v2.4.9
Tue Feb 24 14:53:59.722 [initandlisten] git version: nogitversion
Tue Feb 24 14:53:59.722 [initandlisten] build info: Linux orlo 3.2.0-58-generic #88-Ubuntu SMP Tue Dec 3 17:37:58 UTC 2013 x86_64 BOOST_LIB_VERSION=1_54
Tue Feb 24 14:53:59.722 [initandlisten] allocator: tcmalloc
Tue Feb 24 14:53:59.722 [initandlisten] options: { bind_ip: "127.0.0.1", config: "/etc/mongodb.conf", dbpath: "/var/lib/mongodb", journal: "true", logappend: "true", logpath: "/var/log/mongodb/mongodb.log" }
Tue Feb 24 14:53:59.758 [initandlisten] journal dir=/var/lib/mongodb/journal
Tue Feb 24 14:53:59.758 [initandlisten] recover : no journal files present, no recovery needed
Tue Feb 24 14:53:59.842 [initandlisten]  local Assertion failure isOk() src/mongo/db/pdfile.h 392
0x981b16 0x945a30 0x59f38c 0x7b5cf0 0x6ac2ee 0x6ae35c 0x64ff8e 0x65018d 0x795ecb 0x754385 0x589087 0x589db3 0x58b2af 0x56ad05 0x7fcb4ed78ec5 0x58210c
 /usr/bin/mongod(_ZN5mongo15printStackTraceERSo+0x26) [0x981b16]
 /usr/bin/mongod(_ZN5mongo12verifyFailedEPKcS1_j+0xc0) [0x945a30]
 /usr/bin/mongod(_ZN5mongo11DataFileMgr9getExtentERKNS_7DiskLocE+0x7c) [0x59f38c]
 /usr/bin/mongod(_ZN5mongo11DataFileMgr7findAllERKNS_10StringDataERKNS_7DiskLocE+0x50) [0x7b5cf0]
 /usr/bin/mongod(_ZN5mongo8Database19clearTmpCollectionsEv+0xee) [0x6ac2ee]
 /usr/bin/mongod(_ZN5mongo14DatabaseHolder11getOrCreateERKSsS2_Rb+0x31c) [0x6ae35c]
 /usr/bin/mongod(_ZN5mongo6Client7Context11_finishInitEv+0x2e) [0x64ff8e]
 /usr/bin/mongod(_ZN5mongo6Client7ContextC1ERKSsS3_b+0x6d) [0x65018d]
 /usr/bin/mongod(_ZN5mongo8runCountEPKcRKNS_7BSONObjERSsRi+0x7b) [0x795ecb]
 /usr/bin/mongod(_ZN5mongo14DBDirectClient5countERKSsRKNS_7BSONObjEiii+0xb5) [0x754385]
 /usr/bin/mongod(_ZN5mongo33checkIfReplMissingFromCommandLineEv+0x157) [0x589087]
 /usr/bin/mongod(_ZN5mongo14_initAndListenEi+0xbc3) [0x589db3]
 /usr/bin/mongod(_ZN5mongo13initAndListenEi+0xf) [0x58b2af]
 /usr/bin/mongod(main+0x2d5) [0x56ad05]
 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7fcb4ed78ec5]
 /usr/bin/mongod() [0x58210c]
Tue Feb 24 14:53:59.845 [initandlisten] exception in initAndListen: 0 assertion src/mongo/db/pdfile.h:392, terminating
Tue Feb 24 14:53:59.845 dbexit:
Tue Feb 24 14:53:59.845 [initandlisten] shutdown: going to close listening sockets...
Tue Feb 24 14:53:59.845 [initandlisten] shutdown: going to flush diaglog...
Tue Feb 24 14:53:59.845 [initandlisten] shutdown: going to close sockets...
Tue Feb 24 14:53:59.846 [initandlisten] shutdown: waiting for fs preallocator...
Tue Feb 24 14:53:59.846 [initandlisten] shutdown: lock for final commit...
Tue Feb 24 14:53:59.846 [initandlisten] shutdown: final commit...
Tue Feb 24 14:53:59.846 [initandlisten] shutdown: closing all files...
Tue Feb 24 14:53:59.846 [initandlisten] closeAllFiles() finished
Tue Feb 24 14:53:59.846 [initandlisten] journalCleanup...
Tue Feb 24 14:53:59.846 [initandlisten] removeJournalFiles
Tue Feb 24 14:53:59.897 [initandlisten] shutdown: removing fs lock...
Tue Feb 24 14:53:59.897 dbexit: really exiting now