GSoC week summary III

Jason Eu

Created: 2020/07/13

Modified: 2020/07/13

The overview of progress

The following milestones are planed to be reached before submitting the evaluation of phase-2 (31th-July) of project:

Details of some achievements and difficulties


Thanks to the engine paper, I have got a more clear bird’s-eye view of the plumpy, it will be a nice signal for me to start writing the documentation of plumpy.

Another progress is that I have reorganized the aiida-core documentation localization, due to the new docs structure, it is more easier to manage the localization repository. You can check the translated documentation here (or directly access from the language button from official documentation) everything is perfect!

nest_asyncio not merged

It seems the maintainer of nest_asyncio still not address the nest_asyncio #28

return value of kill_process method

State: Resolved

Since LoopCommunicator is the communicator for all the rpc and broadcast communication, process controlling operation via command line such as verdi process pause which calling the controller.pause_process will wrap the result in one more kiwipy.Future. Therefore, the future get from controller need to be unwrapped by plumpy.unwrap_kiwi_future first.

unwrap future returned from process controller

State: Resolved

The future result return from controller.kill_process is the result of rpc calling of aiida.engine.processes.process::Process::kill method, which will return a future represent a boolean value to indicate that the process and its child process is successfully killed. So the list of futures is chained to a future and returned.

When exception raised and captured by kiwipy rmq can not be disconnected

State: Resolved by kiwipy #71

When exception raised and going to be handled by kiwipy.capture_exception (for example in plumpy.futures.create_task) in event loop other than the communicator one, calling aio_future.set_exception(exc) directly is non-threadsafe.

This will lead to a bad consequence that connection is not be able to be closed:

raise RuntimeError('CRASH')                                                                                         
RuntimeError: CRASH                                                                                                     

During handling of the above exception, another exception occurred:                                                     

Traceback (most recent call last):                                                                                      
File "/data/CONDA_ENV/gsoc-aiida/lib/python3.8/concurrent/futures/", line 328, in _invoke_callbacks           
File "/home/unkcpz/pyProject/kiwipy/kiwipy/rmq/", line 256, in done                                     
File "/data/CONDA_ENV/gsoc-aiida/lib/python3.8/asyncio/", line 254, in set_exception                        
File "/data/CONDA_ENV/gsoc-aiida/lib/python3.8/asyncio/", line 149, in __schedule_callbacks                 
self._loop.call_soon(callback, self, context=ctx)                                                                   
File "/data/CONDA_ENV/gsoc-aiida/lib/python3.8/asyncio/", line 721, in call_soon                        
File "/data/CONDA_ENV/gsoc-aiida/lib/python3.8/asyncio/", line 758, in _check_thread                    
raise RuntimeError(                                                                                                 
RuntimeError: Non-thread-safe operation invoked on an event loop other than the current one

A premature user requirement of AiiDA