Locust while running as library with grpc client not outputting stats

[saurabhsharma721]

Describe the bug

Grpc client not creating stats while running in library mode

Expected behavior

Stats should be created and available both in csv files and in api.

Actual behavior

The Csv files generated and logs created will have zero stats output

locust test have completed running

Test run completed.
requests after run : 0
Failures after run : 0

Steps to reproduce

The code is available here in github repo

https://github.com/saurabhsharma721/grpc_locust_stats_repro_prj

Environment

• OS: mac
• Python version: 3.8.5
• Locust version: (please dont file issues for anything but the most recent release or prerelease builds): 2.24
• Locust file contents (anonymized if necessary): Code available here : https://github.com/saurabhsharma721/grpc_locust_stats_repro_prj/blob/main/grpc/locust_driver.py

I see we have similar question on SO but want to check where to place request events inside the test. A code snippet will help

[cyberw]

Interesting. I dont have time to look at it but hopefully someone will. Or maybe dig into the code base yourself.

[saurabhsharma721]

I am trying to see diff between non ui and ui code and so far nothing

[cyberw]

You should also update locust, just in case that matters.

[BonelessPi]

I had an almost identical issue when running Locust as a library, although I was using SFTP clients instead of grpc. I resolved my issue by using the .events attribute of the Environment object rather than the locust.events module. I do not know if this will work for you, but it may be worth a try.

In your case, I would suggest modifying your Locustfile as so:
Line 26:
def init(self, environment, stub):
self.env = environment
...
Line 50:
self.env.events.request.fire(**request_meta)
Line 69:
self.client = GrpcClient(environment, stub)

I hope this works for you!

[saurabhsharma721]

The above solution worked for me. Thanks @BonelessPi

[cyberw]

Huh. Seems like a bug in the example GrpcClient. Anyone up for making a PR?