Oracle Solution for Error ora-01617

ORA-01617: cannot mount: string is not a valid thread number

What triggered the Error:

The INIT.ORA parameter "thread" is not between 1 and the number of threads allowed by the control file.

What should we do to fix it:

Shut down the instance, change the INIT.ORA parameter and startup, or resize the thread record and/or checkpoint progress record sections of the control file.