<Apr 25, 2012 1:29:58 PM IST> <Info> <Management> <BEA-141281> <unable to get file lock, will retry ...>
<Apr 25, 2012 1:30:08 PM IST> <Info> <Management> <BEA-141281> <unable to get file lock, will retry ...>
<Apr 25, 2012 1:30:18 PM IST> <Info> <Management> <BEA-141281> <unable to get file lock, will retry ...>

Solution :

Navigate to the $DOMAIN_HOME/servers directory
Navigate to the Admin server or respective Managed Server directory.
and then clear the .lok file under the tmp directory

eg :

[fmw10g@dbaloungeapps tmp]$ pwd
/u01/accounts/fmw10g/Oracle/Middleware/user_projects/domains/DOM_OIM/servers/AdminServer/tmp
[fmw10g@dbaloungeapps tmp]$ ls
AdminServer.lok WebServiceUtils.ser _WL_internal _WL_user
[fmw10g@dbaloungeapps tmp]$ rm AdminServer.lok
[fmw10g@dbaloungeapps tmp]$