`FileExistsError` in `Job._sis_setup_directory`

[albertz]

...
[2023-12-05 04:29:29,576] WARNING: interrupted_resumable: Job<alias/exp2023_04_25_rf/conformer_import_moh_att_2023_06_30/base-24gb-v6/train work/
i6_core/returnn/training/ReturnnTrainingJob.jyQaF3P8Ieol>               
[2023-12-05 04:29:29,576] INFO: interrupted_resumable(1) retry_error(4) running(8) waiting(663)                                                  
[2023-12-05 04:31:04,825] ERROR: Exception in thread <_MainThread(MainThread, started 140708433694720)>:                                         
EXCEPTION                                                                                                                                        
Traceback (most recent call last):
  File "/u/zeyer/setups/combined/2021-05-31/tools/sisyphus/sisyphus/tools.py", line 311, in default_handle_exception_interrupt_main_thread.<locals>.wrapped_func
    line: return func(*args, **kwargs)                                                                                                           
    locals:                                                             
      func = <local> <function Manager.run at 0x7ff93ae65940>                                                                                    
      args = <local> (<Manager(Thread-2, initial)>,)                                                                                             
      kwargs = <local> {}                                                                                                                        
  File "/u/zeyer/setups/combined/2021-05-31/tools/sisyphus/sisyphus/manager.py", line 617, in Manager.run                   
    line: self.resume_jobs()                                                                                                                     
    locals:                                                              
      self = <local> <Manager(Thread-2, initial)>                                                                                                
      self.resume_jobs = <local> <bound method Manager.resume_jobs of <Manager(Thread-2, initial)>>                                              
  File "/u/zeyer/setups/combined/2021-05-31/tools/sisyphus/sisyphus/manager.py", line 405, in Manager.resume_jobs                                
    line: self.thread_pool.map(f, self.jobs.get(gs.STATE_INTERRUPTED_RESUMABLE, []))
    locals:                                                                                                                                      
      self = <local> <Manager(Thread-2, initial)>
      self.thread_pool = <local> <multiprocessing.pool.ThreadPool state=RUN pool_size=10>                                                        
      self.thread_pool.map = <local> <bound method Pool.map of <multiprocessing.pool.ThreadPool state=RUN pool_size=10>>                         
      f = <local> <function Manager.resume_jobs.<locals>.f at 0x7ff92c3c0180>                                                                    
      self.jobs = <local> defaultdict(<class 'set'>, {'waiting': {Job<work/i6_core/returnn/search/SearchWordsToCTMJob.sHh83NBWaNtR>, Job<work/i6_
core/recognition/scoring/ScliteJob.TThbUgE8qjSd>, Job<work/i6_core/returnn/forward/ReturnnForwardJobV2.uX3OywkERCr7>, Job<work/i6_core/returnn/se
arch/SearchRemoveLabelJob.cakEqUo..., len = 5, _[0]: {len = 0}           
      self.jobs.get = <local> <built-in method get of collections.defaultdict object at 0x7ff8ac589c60>                                          
      gs = <global> <module 'sisyphus.global_settings' from '/u/zeyer/setups/combined/2021-05-31/tools/sisyphus/sisyphus/global_settings.py'>    
      gs.STATE_INTERRUPTED_RESUMABLE = <global> 'interrupted_resumable', len = 21                                                                
  File "/work/tools/users/zeyer/linuxbrew/opt/[email protected]/lib/python3.11/multiprocessing/pool.py", line 367, in Pool.map                        
    line: return self._map_async(func, iterable, mapstar, chunksize).get()                                                                       
    locals:                                                                                                                                      
      self = <local> <multiprocessing.pool.ThreadPool state=RUN pool_size=10>                                                                    
      self._map_async = <local> <bound method Pool._map_async of <multiprocessing.pool.ThreadPool state=RUN pool_size=10>>                       
      func = <local> <function Manager.resume_jobs.<locals>.f at 0x7ff92c3c0180>                                                                 
      iterable = <local> {Job<alias/exp2023_04_25_rf/conformer_import_moh_att_2023_06_30/base-24gb-v6/train work/i6_core/returnn/training/Returnn
TrainingJob.jyQaF3P8Ieol>}, len = 1                                                                                                              
      mapstar = <global> <function mapstar at 0x7ff93b797d80>                                                                                    
      chunksize = <local> None                                                                                                                   
      get = <not found>                                                 
  File "/work/tools/users/zeyer/linuxbrew/opt/[email protected]/lib/python3.11/multiprocessing/pool.py", line 774, in ApplyResult.get
    line: raise self._value
    locals:
      self = <local> <multiprocessing.pool.MapResult object at 0x7ff8ac510a90>
      self._value = <local> FileExistsError(17, 'File exists')
  File "/work/tools/users/zeyer/linuxbrew/opt/[email protected]/lib/python3.11/multiprocessing/pool.py", line 125, in worker
    line: result = (True, func(*args, **kwds))
    locals:
      result = <local> None
      func = <local> None
      args = <local> None
      kwds = <local> None
  File "/work/tools/users/zeyer/linuxbrew/opt/[email protected]/lib/python3.11/multiprocessing/pool.py", line 48, in mapstar
    line: return list(map(*args))
    locals:
      list = <builtin> <class 'list'>
      map = <builtin> <class 'map'>
      args = <local> (<function Manager.resume_jobs.<locals>.f at 0x7ff92c3c0180>, (Job<alias/exp2023_04_25_rf/conformer_import_moh_att_2023_06_3
0/base-24gb-v6/train work/i6_core/returnn/training/ReturnnTrainingJob.jyQaF3P8Ieol>,))
  File "/u/zeyer/setups/combined/2021-05-31/tools/sisyphus/sisyphus/manager.py", line 399, in Manager.resume_jobs.<locals>.f
    line: job._sis_setup_directory(force=True)
    locals:
      job = <local> Job<alias/exp2023_04_25_rf/conformer_import_moh_att_2023_06_30/base-24gb-v6/train work/i6_core/returnn/training/ReturnnTraini
ngJob.jyQaF3P8Ieol>
      job._sis_setup_directory = <local> <bound method Job._sis_setup_directory of Job<alias/exp2023_04_25_rf/conformer_import_moh_att_2023_06_30
/base-24gb-v6/train work/i6_core/returnn/training/ReturnnTrainingJob.jyQaF3P8Ieol>>
      force = <not found>
  File "/u/zeyer/setups/combined/2021-05-31/tools/sisyphus/sisyphus/job.py", line 284, in Job._sis_setup_directory
    line: os.symlink(src=os.path.abspath(str(creator._sis_path())), dst=link_name, target_is_directory=True)
    locals:
      os = <global> <module 'os' (frozen)>
      os.symlink = <global> <built-in function symlink>
      src = <not found>
      os.path = <global> <module 'posixpath' (frozen)>
      os.path.abspath = <global> <function abspath at 0x7ff93be74f40>
      str = <builtin> <class 'str'>
      creator = <local> Job<work/i6_core/text/label/subword_nmt/train/ReturnnTrainBpeJob.vTq56NZ8STWt>
      creator._sis_path = <local> <bound method Job._sis_path of Job<work/i6_core/text/label/subword_nmt/train/ReturnnTrainBpeJob.vTq56NZ8STWt>>
      dst = <not found>
      link_name = <local> 'work/i6_core/returnn/training/ReturnnTrainingJob.jyQaF3P8Ieol/input/i6_core_text_label_subword_nmt_train_ReturnnTrainBpeJob.vTq56NZ8STWt', len = 136
      target_is_directory = <not found>
FileExistsError: [Errno 17] File exists: '/u/zeyer/setups/combined/2021-05-31/work/i6_core/text/label/subword_nmt/train/ReturnnTrainBpeJob.vTq56N
Z8STWt' -> 'work/i6_core/returnn/training/ReturnnTrainingJob.jyQaF3P8Ieol/input/i6_core_text_label_subword_nmt_train_ReturnnTrainBpeJob.vTq56NZ8S
TWt'
[2023-12-05 04:31:05,077] WARNING: Main thread exit. Still running non-daemon threads: {<LocalEngine(Thread-1, started 140708182750784)>}

This is the first time I see this. Probably a very rare issue.

After a restart of the manager, I don't see the problem anymore.

[michelwi]

Mh.. I have never seen this before.

Do you have two managers running simultaneously that race to create the same work folder?

[albertz]

Do you have two managers running simultaneously that race to create the same work folder?

No.

[Atticus1806]

I have seen it before, but I am not 100% sure anymore how this was caused. It might have been during the FS problem times on asr3 but i cant tell for sure.

[critias]

My first guess would also have been multiple managers or some filesystem problems. The function should not be called in parallel inside sisyphus for the same job. It's called here: https://github.com/rwth-i6/sisyphus/blob/4c3b40f289110bef30e25662f50593898067c0e3/sisyphus/manager.py#L385

Let us know if this problem reappears.