Locust starts throwing failures when users > 130 (OS X)

I got locust installed on Macbook Air The test is very basic, only one page is tested:

---

from locust import HttpLocust, TaskSet, task

class UserBehavior(TaskSet):
    def on_start(self):
        pass

    @task
    def profile(self):
        self.client.get("/nonprofit/ifrc/articles/125585")

class WebsiteUser(HttpLocust):
    task_set = UserBehavior
    min_wait=5000
    max_wait=15000

---

and the user load is very small obviously.

GET /nonprofit/ifrc/articles/125585 ConnectionError(MaxRetryError("HTTPConnectionPool(host='www.qammado.com', port=80): Max retries exceeded with url: /nonprofit/ifrc/articles/125585 (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x10ad788d0>: Failed to establish a new connection: [Errno 8] nodename nor servname provided, or not known',))",),)

[rafalf]

yes that’s the problem ! thanks. Just in case if someone stumble upon the same issue the command is: ulimit -S -n 1024 there are other ways of setting it up as well closing it

[DataGreed]

Oops, my bad.

The proper way to check for number of file descriptors on MacOS currently is:

ulimit -n

or you can use this to see all limits:

ulimit -a

Mine was 256, changed it to 4096 and the issue was resolved:

ulimit -n 4096

Note: changes don’t persist and last current terminal session only.