Dbua hangs at select count(*) from v$rman_backup_job_details where status = 'RUNNING'"

Hi Experts,

I am trying to upgrade 10.2.0.5 database to 11.2.0.3 through DBUA.

while starting dbua after selecting database it got hanged.

it got hanged at "select count(*) from v$rman_backup_job_details where status = 'RUNNING'"
:

sqls.log

select count(*) from v$rman_backup_job_details where status = 'RUNNING';
set heading off
set timing off
set pagesize 0
set feedback off
set linesize 4000
set sqlprompt 'SQL_ENGINE_END_OF_SQL'
show sqlprompt
set sqlprompt 'SQL>'



trace.log:
[Thread-28] [ 2013-09-14 14:15:00.954 IST ] [Database.updateNonDefaultInitParams:1214]  mts value altered based on db version:null
[Thread-28] [ 2013-09-14 14:15:00.969 IST ] [CompManager.obtainGenericDbInfo:2502]  get number of data files backing up