Getting Error while doing the Server bounce

Hi All,
When we are  doing server bounce it is taking lot of time to start and at last it is end with error.Please find the error below

Error:
==============================================================================
opmn id=phdefdmq02:6200
    1 of 2 processes started.

ias-instance id=dmtdev.phdefdmq02
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ias-component/process-type/process-set:
    default_group/home/default_group/

Error
--> Process (index=1,uid=1436776144,pid=6171)
    time out while waiting for a managed process to start
    Log:
    /apps/demantra/oracle/product/10.1.3.1/OracleAS_1/opmn/logs//default_group~h                                             ome~default_group~1.log.



Please help me.

Regards
Naresh