question: the process would be blocking in Validation step
context: Problem:
  I have a problem. when i train the model, the process would be blocking in validation step(or validation sanity check) but in the training step, it can work. And I debug in the pytorch-lightning , i found when loading data from validation dataloader it would be blocking. I am not sure what problem.
  Environment:
  docker; the lastest pytorch-lighting;gpu a100
  log:
  INFO Using validation DataLoader3DOffset with {}
  INFO Building Sampling Cache for Dataloder
  Sampling Cache: 100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 2/2 [00:00<00:00, 1445.07it/s]
  INFO Using 5 num_processes and 2 num_cached_per_queue for augmentation.                                                                                                           | 0/2 [00:00<?, ?it/s]
  INFO VALIDATION KEYS:
  odict_keys(['case_0', 'case_7'])
  using pin_memory on device 0
  
  I test the validation step and it world jam
  can you help me, thank you !!!!!
answer: sorry,  It is my fault. now i solve this problem