App Engine Python module Basic and Manual scaling not working -

my google app engine application needs run lengthy calculation. automatic scaling on module returns deadlineexceedederror, tried switching manual , basic scaling.

for basic scaling, added yaml file.

instance_class: b2 basic_scaling:   max_instances: 5   idle_timeout: 10m 

but when send url request module, logs flooded 56:

/_ah/start 404 no handlers matched url. 

then returns:

httperror: http error 503: service unavailable 

for manual scaling, added yaml file:

instance_class: b2 manual_scaling:     instances: 1 

but when send url request module, after while get:

httperror: http error 503: service unavailable 

but nothing in logs.

what missing? need put handler /_ah/start? thought 404 acceptable start module.

figured out. had add handler module.

i added:

- url: /_ah/start   script: colors.handler.app 

to handlers: , worked.