Assuming you’re asking in good faith:
“Retard” used to be a largely medical term used to refer to mentally disabled people. It’s common usage in the past 10 years or so has been “bad, stupid, less than, etc”. By using the term that way, you’re passively connecting disabled people to that concept of “bad, stupid, less than, etc”. I think it’s also considered a slur lately
One of the slave node’s child process failed, so the master node sent a signal to terminate the child and restart the slave
There’s pretty solid reason my research group is pushing to use “head node and executor nodes” nomenclature rather than the old-school “master node and slave nodes” nomenclature, haha