In that case, take a look over here.
Try running the following command:
lsof -i :<portnumber>
You can then kill the responsible process using the reported PID
Yep! By default, it will write to ~/py-processors.log
. You can specify a different location when initializing the API:
from processors import *
API = ProcessorsAPI(port=8886, log_file="my/desired/log/file.log")