Oracle Database Hang at startup

Hello All,

When I start the oracle database 11.1.0.7.0 it just hangs at the ALTER DATABASE OPEN phase  and does not open.

SQL> alter database open;

it just shows the following message at the end of the alert log.

ALTER DATABASE   MOUNT

This instance was first to mount

NOTE:Loaded library: System

Wed Oct 11 17:45:37 2017

SUCCESS: diskgroup EBSHRDATA was mounted

Setting recovery target incarnation to 2

Wed Oct 11 17:45:41 2017

Successful mount of redo thread 1, with mount id 368983743

Database mounted in Shared Mode (CLUSTER_DATABASE=TRUE)

Lost write protection disabled

Wed Oct 11 17:45:46 2017

Completed: ALTER DATABASE   MOUNT

Wed Oct 11 17:46:44 2017

alter database open

This instance was first to open