In worker job.variables is empty

[chDame]

Describe the bug
Hi, I need to work with variables that can be present or not in my worker. So I can't use the parameters as such :
@worker.task(task_type="my_task")
async def my_task(x: int):
return {"y": x + 1}

I want to get them from the job
@worker.task(task_type="my_task")
async def my_task(job: Job):
print(job.variables)
return {"y": job.variables["myVar"]}

but job.variables is {}

Expected behavior
I would expect job.variables to contain all variables from the process

Desktop (please complete the following information):

• Device: Macbook pro
• OS: 12.4

[72pitu]

I have same problem.
worker.before(example_logging_task_decorator) returns:
{'jobKey': 2251799813855108, 'taskType': 'next_02', 'processInstanceKey': 2251799813855094, 'bpmnProcessId': 'Ingo_TestProcessID_1', 'processDefinitionVersion': 4, 'processDefinitionKey': 2251799813855092, 'elementId': 'Activity_05p8zom', 'elementInstanceKey': 2251799813855106, 'customHeaders': {}, 'worker': 'N-PF29C08M', 'retries': 3, 'deadline': 1657976564906, 'variables': {'job': {'jobKey': 2251799813855108, 'taskType': 'next_02', 'processInstanceKey': 2251799813855094, 'bpmnProcessId': 'Ingo_TestProcessID_1', 'processDefinitionVersion': 4, 'processDefinitionKey': 2251799813855092, 'elementId': 'Activity_05p8zom', 'elementInstanceKey': 2251799813855106, 'customHeaders': {}, 'worker': 'N-PF29C08M', 'retries': 3, 'deadline': 1657976564906, 'variables': {}}}}

The content of variables seems wrong however in
worker.after(example_logging_task_decorator) looks already somewhat better.
{'jobKey': 2251799813855108, 'taskType': 'next_02', 'processInstanceKey': 2251799813855094, 'bpmnProcessId': 'Ingo_TestProcessID_1', 'processDefinitionVersion': 4, 'processDefinitionKey': 2251799813855092, 'elementId': 'Activity_05p8zom', 'elementInstanceKey': 2251799813855106, 'customHeaders': {}, 'worker': 'N-PF29C08M', 'retries': 3, 'deadline': 1657976564906, 'variables': {'worker2': 'value2'}}

Expectation: Find all global process variables in job.variables.

Tested in Windows with Python 3.9.2

[Zelldon]

I stumbled over the SO question and briefly looked at it.

I'm not a Python expert but it looks to me like the python client sends an empty list as fetch variables see here:

• https://github.com/camunda-community-hub/pyzeebe/blob/master/pyzeebe/worker/job_poller.py#L59
• https://github.com/camunda-community-hub/pyzeebe/blob/master/pyzeebe/task/task_config.py#L20

I did an example with Zbctl how this behaves.

With all variables of the job:

$ zbctl --insecure activate jobs benchmark-task --maxJobsToActivate 1 
{
  "jobs": [
    {
      "key": "4503599627636942",
      "type": "benchmark-task",
      "processInstanceKey": "4503599627636933",
      "bpmnProcessId": "benchmark",
      "processDefinitionVersion": 1,
      "processDefinitionKey": "2251799813685253",
      "elementId": "task",
      "elementInstanceKey": "4503599627636941",
      "customHeaders": "{}",
      "worker": "zbctl",
      "retries": 3,
      "deadline": "1706858053491",
      "variables": 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    }
  ]
}

When we specify an empty list we say we don't care about variables. The result will be empty.

$ zbctl --insecure activate jobs benchmark-task --maxJobsToActivate 1 --variables "[]"
{
  "jobs": [
    {
      "key": "6755399441436060",
      "type": "benchmark-task",
      "processInstanceKey": "6755399441436051",
      "bpmnProcessId": "benchmark",
      "processDefinitionVersion": 1,
      "processDefinitionKey": "2251799813685253",
      "elementId": "task",
      "elementInstanceKey": "6755399441436059",
      "customHeaders": "{}",
      "worker": "zbctl",
      "retries": 3,
      "deadline": "1706858056779",
      "variables": "{}"
    }
  ]
}

[chennaikun]

I got the same error.

if i comments the variables_to_fetch like this:

@worker.task(
    task_type="tms_save_to_db",
    exception_handler=exception_handler,
    # variables_to_fetch=["order"],
)

then the job.variables is empty。

but if i specified the variables_to_fetch with a list, like

@worker.task(
    task_type="tms_save_to_db",
    exception_handler=exception_handler,
    variables_to_fetch=["order"],
)

I got the error:
2024-03-03 13:20:50.911 | ERROR | __main__:exception_handler:26 - tms_save_to_db_task() got an unexpected keyword argument 'order'

[matthieu-dubin]

I solved this by adding *args, *kwargs in the parameters of the task function. Then, job.variables has all variables sent by zeebe:

@worker.task(task_type="launch_job", exception_handler=on_error)
async def launch_job(job: Job, *args, **kwargs) -> dict:
    some_variable = job.variables["some_variable"]