Could not start mongodb arbiter after hard reset because of mongod.lock exist.

Wed Mar 27 18:09:36.674 [initandlisten] MongoDB starting : pid=1960 port=27019 dbpath=/mongodb/arbdata 64-bit host=node61.cl$

Wed Mar 27 18:09:36.674 [initandlisten] db version v2.4.1

Wed Mar 27 18:09:36.674 [initandlisten] git version: 1560959e9ce11a693be8b4d0d160d633eee75110

Wed Mar 27 18:09:36.674 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:2$

Wed Mar 27 18:09:36.674 [initandlisten] allocator: tcmalloc

Wed Mar 27 18:09:36.674 [initandlisten] options: { auth: "true", config: "/etc/mongoarb.conf", dbpath: "/mongodb/arbdata", k$

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Unclean shutdown detected.

Please visit http://dochub.mongodb.org/core/repair for recovery instructions.

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Wed Mar 27 18:09:36.674 [initandlisten] exception in initAndListen: 12596 old lock file, terminating

Wed Mar 27 18:09:36.674 dbexit:

Wed Mar 27 18:09:36.674 [initandlisten] shutdown: going to close listening sockets...

Wed Mar 27 18:09:36.674 [initandlisten] shutdown: going to flush diaglog...

Wed Mar 27 18:09:36.674 [initandlisten] shutdown: going to close sockets...

Wed Mar 27 18:09:36.675 [initandlisten] shutdown: waiting for fs preallocator...

Wed Mar 27 18:09:36.675 [initandlisten] shutdown: closing all files...

Wed Mar 27 18:09:36.675 [initandlisten] closeAllFiles() finished

Wed Mar 27 18:09:36.675 dbexit: really exiting now