During upgrade of \GI 11.2.0.4 to 12.1.0.2 failing with node-1 hang and shut down server

./rootupgrade.sh

Performing root user operation.

The following environment variables are set as:

    ORACLE_OWNER= grid

    ORACLE_HOME=  /GRID_HOME_12C/app/12.1.2/grid

Enter the full pathname of the local bin directory: [/usr/local/bin]:

The contents of "dbhome" have not changed. No need to overwrite.

The contents of "oraenv" have not changed. No need to overwrite.

The contents of "coraenv" have not changed. No need to overwrite.

Entries will be added to the /etc/oratab file as needed by

Database Configuration Assistant when a database is created

Finished running generic part of root script.

Now product-specific root actions will be performed.