After setting up ADG, instance 2 cannot start ora-29760: instance_ number parameter not specified

oerr ora 29760
29760, 00000, "instance_number parameter not specified"
// *Cause: The init.ora file did not contain a value for the instance_number
// which is required to identify this instance to other instances of
// the database running on the same cluster
// *Action: Assign a value to the instance_number parameter in the init.ora
// parameter file

create pfile='/tmp/test.ora' from spfile;
cat /tmp/test.ora'

View found missing instances 2 Get the information

https://www.cnblogs.com/shaozi/p/8344031.html