Spawning is complete and report waittime is expired, but not all reports received from workers

[patilpradip1293]

Prerequisites

• I am using the latest version of Locust
• I am reporting a bug, not asking a question

Description

I have set up a master-worker architecture for Locust, with the master running on GCP GKE and the workers on Cloud Run. When initiating a test from the Locust UI, I encounter the following error:

[2025-02-07 10:29:22,100] locust-master-85665bc96-pc7gl/INFO/locust.runners: localhost_3f87178382de4ef0960f781954675a4f (index 32) reported as ready. 1 workers connected.
[2025-02-07 10:30:17,659] locust-master-85665bc96-pc7gl/INFO/locust.runners: Sending spawn jobs of 10 users at 1.00 spawn rate to 1 ready workers
[2025-02-07 10:30:21,179] locust-master-85665bc96-pc7gl/INFO/locust.runners: Worker localhost_3f87178382de4ef0960f781954675a4f failed to send heartbeat, setting state to missing.
[2025-02-07 10:30:21,179] locust-master-85665bc96-pc7gl/INFO/locust.runners: The last worker went missing, stopping test.
[2025-02-07 10:30:27,672] locust-master-85665bc96-pc7gl/INFO/locust.runners: Spawning is complete and report waittime is expired, but not all reports received from workers: {} (0 total users)
[2025-02-07 10:30:58,217] locust-master-85665bc96-pc7gl/INFO/locust.runners: Worker localhost_3f87178382de4ef0960f781954675a4f failed to send heartbeat, setting state to missing.
[2025-02-07 10:30:58,217] locust-master-85665bc96-pc7gl/INFO/locust.runners: The last worker went missing, stopping test.
[2025-02-07 10:31:32,804] locust-master-85665bc96-pc7gl/WARNING/locust.runners: Got spawning message from unknown worker localhost_3f87178382de4ef0960f781954675a4f. Asking worker to quit.
[2025-02-07 10:31:55,445] locust-master-85665bc96-pc7gl/WARNING/locust.runners: Got spawning message from unknown worker localhost_3f87178382de4ef0960f781954675a4f. A
```sking worker to quit.


**It's working when I use the same Docker image and run it locally.**


### Command line

Tests are run from Locust UI

### Locustfile contents

```python3
import os
import json
import random
from locust import HttpUser, task, between

class MyUser(HttpUser):
    wait_time = between(1, 5)

    @task
    def get_homepage(self):
        """Simple GET request to test Locust"""
        self.client.get("/")

Python version

python:3.10-slim

Locust version

locust==2.32.8

Operating system

Ubuntu 24.04.1 LTS (Noble)