Charts not working well in version 1.4.2

[mthaak]

Hi Locust developers,

I discovered your tool today and it looks like exactly what I need. However, I found that in version 1.4.2 (release 21 hours ago) the charts are not working well.

Describe the bug

The Reponse Times (ms) and Number of Users charts don't update at all. The Total Requests per Second chart updates but the tooltip values are undefined. This only happens in Locust 1.4.2. In Locust 1.4.1 the charts work perfectly.

Actual behavior

Locust 1.4.2:

This is what I see in my browser's dev console:

(many many times the same error)

Expected behavior

Exact same set up but then using Locust 1.4.1:

Steps to reproduce

See environment below

Environment

• OS: Windows 10
• Python version: 3.8.5
• Locust version: 1.4.2
• Locust command line that you ran: locust --host=...
• Locust file contents (anonymized if necessary):

from locust import HttpUser, task, between

class QuickstartUser(HttpUser):
    wait_time = between(1, 2.5)

    @task
    def get_1(self):
        self.client.get(...)

    @task
    def get_2(self):
        self.client.get(...)

    @task
    def get_3(self):
        self.client.get(...)

    def on_start(self):
        self.client.headers['Authorization'] = f'Bearer {AUTH_TOKEN}'

50 total users spawned at 10/s

[cyberw]

@aek Can you take a look? I think your changes are the only ones relating to graphs in 1.4.2.

[aek]

@cyberw Yeah, let me take a look about it and I will get back to this issue
@mthaak Thanks for reporting this one and glad you like the project too

[heyman]

This should now be fixed in 1.4.3, which should be up on PyPI in a couple of minutes once the build script has finished. Thanks for reporting @mthaak, and thanks for fixing @aek!