Job Worker on User Task works intermittently

[Eladiv]

I’m using Camunda 8 with a user task configured to be handled by a job worker. However, the worker method only gets triggered intermittently — not every time the process reaches the user task. I expect it to trigger consistently.

Any idea why?

Camunda version: 8.6.9

Config:
camunda.client.mode=simple
camunda.client.zeebe.execution-threads=2
camunda.client.zeebe.request-timeout=50m
camunda.client.zeebe.enabled=true
camunda.client.zeebe.base-url=http://localhost:26500
camunda.client.zeebe.gateway-url=http://localhost:26500

Job worker code:
@JobWorker(type = “io.camunda.zeebe:userTask”, autoComplete = false)
public void handleUserTask(final ActivatedJob job) {
log.info(“Received user task: {}”, job.getElementId());
// logic here
}

[nathan.loding]

Hi @Eladiv, welcome to the forums! Does the job never get activated, or does it sometimes take additional time before it is activated?

[Eladiv]

Sometimes get activated, sometimes not. Also i’ve noticed that after i restart the application, the jobs that did activated first time when the flow reached the User Task gets activated all at once.

Anyway, i downgraded from 8.6.9 to 8.3.0 and the issue disappeared. The worker now consistently activates as expected.

[nathan.loding]

@Eladiv - this is very unexpected, and sounds like a possible bug. Can you share a few more details so we can try to reproduce the issue?

• You were using version 8.6.9; how did you install it? Were you using Docker, or C8 Run, or Helm, or something else?
• Can you share the config for your deployment? (docker-compose.yaml, values.yaml, etc.)
• Is it possible to share the BPMN model?
• Is it possible to share the full Java project for the worker?