训练时loss为nan

[TanLuuu]

作者你好，我在训练你的网络的时候，在迭代过程中遇到了loss为nan的问题，无法正常训练，请问这要怎么解决呢
2023-06-16 21:58:43,765 INFO: [debug..][epoch: 0, iter: 151, lr:(2.000e-04,2.000e-05,)] [eta: 395 days, 5:42:49, time (data): 0.489 (0.001)] l_pix: -3.0743e+01
2023-06-16 21:58:44,519 INFO: [debug..][epoch: 0, iter: 152, lr:(2.000e-04,2.000e-05,)] [eta: 392 days, 15:56:30, time (data): 0.482 (0.001)] l_pix: -2.8084e+01
2023-06-16 21:58:44,519 INFO: Saving models and training states.
Test 00001088: 100%|██████████| 1089/1089 [23:56<00:00, 1.29s/image]
2023-06-16 22:22:48,051 INFO: Validation debug, # psnr: 28.4838 # ssim: 0.9036
2023-06-16 22:22:48,546 INFO: [debug..][epoch: 0, iter: 153, lr:(2.000e-04,2.000e-05,)] [eta: 411 days, 19:13:58, time (data): 0.490 (0.001)] l_pix: -3.0197e+01
2023-06-16 22:22:49,036 INFO: [debug..][epoch: 0, iter: 154, lr:(2.000e-04,2.000e-05,)] [eta: 409 days, 3:35:46, time (data): 0.489 (0.001)] l_pix: -2.7506e+01
2023-06-16 22:22:49,505 INFO: [debug..][epoch: 0, iter: 155, lr:(2.000e-04,2.000e-05,)] [eta: 406 days, 12:46:06, time (data): 0.470 (0.001)] l_pix: inf
2023-06-16 22:22:49,988 INFO: [debug..][epoch: 0, iter: 156, lr:(2.000e-04,2.000e-05,)] [eta: 403 days, 22:44:43, time (data): 0.482 (0.002)] l_pix: nan
2023-06-16 22:22:50,474 INFO: [debug..][epoch: 0, iter: 157, lr:(2.000e-04,2.000e-05,)] [eta: 401 days, 9:30:33, time (data): 0.487 (0.002)] l_pix: nan
2023-06-16 22:22:50,938 INFO: [debug..][epoch: 0, iter: 158, lr:(2.000e-04,2.000e-05,)] [eta: 398 days, 21:02:06, time (data): 0.464 (0.001)] l_pix: nan
2023-06-16 22:22:51,750 INFO: [debug..][epoch: 0, iter: 159, lr:(2.000e-04,2.000e-05,)] [eta: 396 days, 9:26:15, time (data): 0.487 (0.001)] l_pix: nan
2023-06-16 22:22:52,240 INFO: [debug..][epoch: 0, iter: 160, lr:(2.000e-04,2.000e-05,)] [eta: 393 days, 22:28:10, time (data): 0.490 (0.002)] l_pix: nan
2023-06-16 22:22:52,240 INFO: Saving models and training states.
Test 00001088: 100%|██████████| 1089/1089 [21:33<00:00, 1.19s/image]
2023-06-16 22:44:32,789 INFO: Validation debug, # psnr: -42.1933 # ssim: 0.0002
2023-06-16 22:44:33,276 INFO: [debug..][epoch: 0, iter: 161, lr:(2.000e-04,2.000e-05,)] [eta: 410 days, 1:52:18, time (data): 0.481 (0.001)] l_pix: nan
2023-06-16 22:44:33,763 INFO: [debug..][epoch: 0, iter: 162, lr:(2.000e-04,2.000e-05,)] [eta: 407 days, 13:36:31, time (data): 0.485 (0.001)] l_pix: nan