GRID install on standalone fails with 'Users with same UID'

Hi,

I am trying to install the GRID Infrastructure on OEL6 and keep getting the following error , i tried to dig in all corners, but no clue why installer keep giving me this error

1. User Existence : oracle --> FAILED

2. Users with same UID --> FAILED

when i checked at OS to see whether any user has same UID, but none found, I have attached the installer log,cluvfy for review

[root@oel6ora112 dev]# awk -v val=0 -F ":" '$3==val{print $1}' /etc/passwd

root

[root@oel6ora112 dev]# awk -v val=54321 -F ":" '$3==val{print $1}' /etc/passwd

oracle