Softtimeout and timeout in celery tasks not working

I have a task that takes 20 seconds on average. I want to set soft and hard timeout for this task. I define it like this:

@app.task(ignore_result=True, timeout=100, soft_timeout=50)
def MYTASK(SOMEPARAMS):
     # MYTASK

      

        
        
        
      

    

But it doesn't work. I am testing it with these parameters:

@app.task(ignore_result=True, timeout=1, soft_timeout=1)
def MYTASK(SOMEPARAMS):
     # MYTASK

      

        
        
        
      

    

But my tasks are working correctly and they take time for 1 second, while this should never be done.

why is the timeout not working?

Edit : When I use 1s timeout in my log I see printouts like this:

[2014-08-22 12:51:00,003: INFO/MainProcess] Task MYTASK[56002e72-a093-46c6-86cd-4c7b7e6ea7c3] succeeded in 15.549023876s: None