Pytorch multi-processes error on SageMaker GPU instance

1

Im trying to train forecasting model using Pytorch-forecasting on GPU instance (ml.p3.16xlarge), it only works when I specify using one GPU, when I configure more than one GPU it returns error:

ProcessExitedException: process 1 terminated with signal SIGSEGV

env:

Python: 3.10.6 Pytorch: 1.13.1+cu116 pytorch-lightning : 1.9.0 pytorch-forecasting: 0.10.3

code:
` trainer = pl.Trainer(

max_epochs=5,
accelerator='gpu', 
devices=2,
enable_model_summary=True,
gradient_clip_val=0.1,
limit_train_batches=30, 
callbacks=[lr_logger, early_stop_callback],
logger=logger,)

`

what’s missing here?

2

Could you post the backtrace via:

gdb --args python script.py args
...
run
...
bt
3

Thank you @ptrblck ! below is the backtrace:

sh-4.2$ gdb --args /home/ec2-user/anaconda3/envs/python3/bin/python3 gpu-test.py 
GNU gdb (GDB) Red Hat Enterprise Linux 8.0.1-36.amzn2.0.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /home/ec2-user/anaconda3/envs/python3/bin/python3...done.
(gdb) run
Starting program: /home/ec2-user/anaconda3/envs/python3/bin/python3 gpu-test.py
Missing separate debuginfos, use: debuginfo-install glibc-2.26-62.amzn2.x86_64
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
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Missing separate debuginfo for /home/ec2-user/anaconda3/envs/python3/lib/python3.10/site-packages/torch/lib/libgomp-a34b3233.so.1
Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/5f/4fb88af97be3ecacc71363136bb015b2a07119.debug
Missing separate debuginfo for /lib64/libcuda.so.1
Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/d7/a1b5fea0f4f1f6375e4ed8a59d4afbd04ef289.debug

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Global seed set to 42
GPU available: True (cuda), used: True
TPU available: False, using: 0 TPU cores
IPU available: False, using: 0 IPUs
HPU available: False, using: 0 HPUs
Number of parameters in network: 29.7k
Detaching after vfork from child process 95196.
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Detaching after vfork from child process 95207.
Global seed set to 42
GPU available: True (cuda), used: True
TPU available: False, using: 0 TPU cores
IPU available: False, using: 0 IPUs
HPU available: False, using: 0 HPUs
Number of parameters in network: 29.7k
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/spawn.py", line 125, in _main
    prepare(preparation_data)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/spawn.py", line 236, in prepare
    _fixup_main_from_path(data['init_main_from_path'])
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/spawn.py", line 287, in _fixup_main_from_path
    main_content = runpy.run_path(main_path,
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/runpy.py", line 289, in run_path
    return _run_module_code(code, init_globals, run_name,
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/runpy.py", line 96, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/home/ec2-user/SageMaker/gpu-test.py", line 139, in <module>
    trainer.fit(
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/site-packages/pytorch_lightning/trainer/trainer.py", line 608, in fit
    call._call_and_handle_interrupt(
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/site-packages/pytorch_lightning/trainer/call.py", line 36, in _call_and_handle_interrupt
    return trainer.strategy.launcher.launch(trainer_fn, *args, trainer=trainer, **kwargs)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/site-packages/pytorch_lightning/strategies/launchers/multiprocessing.py", line 113, in launch
    mp.start_processes(
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/site-packages/torch/multiprocessing/spawn.py", line 189, in start_processes
    process.start()
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/process.py", line 121, in start
    self._popen = self._Popen(self)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/context.py", line 288, in _Popen
    return Popen(process_obj)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 32, in __init__
    super().__init__(process_obj)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/popen_fork.py", line 19, in __init__
    self._launch(process_obj)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 42, in _launch
    prep_data = spawn.get_preparation_data(process_obj._name)
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/spawn.py", line 154, in get_preparation_data
    _check_not_importing_main()
  File "/home/ec2-user/anaconda3/envs/python3/lib/python3.10/multiprocessing/spawn.py", line 134, in _check_not_importing_main
    raise RuntimeError('''
RuntimeError: 
        An attempt has been made to start a new process before the
        current process has finished its bootstrapping phase.

        This probably means that you are not using fork to start your
        child processes and you have forgotten to use the proper idiom
        in the main module:

            if __name__ == '__main__':
                freeze_support()
                ...

        The "freeze_support()" line can be omitted if the program
        is not going to be frozen to produce an executable.
4

Unfortunately no stacktrace was created and I also don’t see any crashes in the run:

Global seed set to 42
GPU available: True (cuda), used: True
TPU available: False, using: 0 TPU cores
IPU available: False, using: 0 IPUs
HPU available: False, using: 0 HPUs
Done.
5

updated the backtrace (please refer to the same code block above), hope this time it helps!

6

Your code now fails with a RuntmeError and does not show the segfault.

7

the RuntimeError only happens when I try to use more than one gpu, when I use one, there is no error, see the results with one GPU:
`sh-4.2$ gdb --args /home/ec2-user/anaconda3/envs/python3/bin/python3 gpu-test.py
GNU gdb (GDB) Red Hat Enterprise Linux 8.0.1-36.amzn2.0.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type “show copying”
and “show warranty” for details.
This GDB was configured as “x86_64-redhat-linux-gnu”.
Type “show configuration” for configuration details.
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type “help”.
Type “apropos word” to search for commands related to “word”…
Reading symbols from /home/ec2-user/anaconda3/envs/python3/bin/python3…done.
(gdb) run
Starting program: /home/ec2-user/anaconda3/envs/python3/bin/python3 gpu-test.py
Missing separate debuginfos, use: debuginfo-install glibc-2.26-62.amzn2.x86_64
[Thread debugging using libthread_db enabled]
Using host libthread_db library “/lib64/libthread_db.so.1”.
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Missing separate debuginfo for /home/ec2-user/anaconda3/envs/python3/lib/python3.10/site-packages/torch/lib/libgomp-a34b3233.so.1
Try: yum --enablerepo=‘debug’ install /usr/lib/debug/.build-id/5f/4fb88af97be3ecacc71363136bb015b2a07119.debug
Missing separate debuginfo for /lib64/libcuda.so.1
Try: yum --enablerepo=‘debug’ install /usr/lib/debug/.build-id/d7/a1b5fea0f4f1f6375e4ed8a59d4afbd04ef289.debug
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Global seed set to 42
GPU available: True (cuda), used: True
TPU available: False, using: 0 TPU cores
IPU available: False, using: 0 IPUs
HPU available: False, using: 0 HPUs
Number of parameters in network: 29.7k
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LOCAL_RANK: 0 - CUDA_VISIBLE_DEVICES: [0,1,2,3,4,5,6,7]

| Name | Type | Params

0 | loss | QuantileLoss | 0
1 | logging_metrics | ModuleList | 0
2 | input_embeddings | MultiEmbedding | 1.3 K
3 | prescalers | ModuleDict | 256
4 | static_variable_selection | VariableSelectionNetwork | 3.4 K
5 | encoder_variable_selection | VariableSelectionNetwork | 8.0 K
6 | decoder_variable_selection | VariableSelectionNetwork | 2.7 K
7 | static_context_variable_selection | GatedResidualNetwork | 1.1 K
8 | static_context_initial_hidden_lstm | GatedResidualNetwork | 1.1 K
9 | static_context_initial_cell_lstm | GatedResidualNetwork | 1.1 K
10 | static_context_enrichment | GatedResidualNetwork | 1.1 K
11 | lstm_encoder | LSTM | 2.2 K
12 | lstm_decoder | LSTM | 2.2 K
13 | post_lstm_gate_encoder | GatedLinearUnit | 544
14 | post_lstm_add_norm_encoder | AddNorm | 32
15 | static_enrichment | GatedResidualNetwork | 1.4 K
16 | multihead_attn | InterpretableMultiHeadAttention | 1.1 K
17 | post_attn_gate_norm | GateAddNorm | 576
18 | pos_wise_ff | GatedResidualNetwork | 1.1 K
19 | pre_output_gate_norm | GateAddNorm | 576
20 | output_layer | Linear | 119

29.7 K Trainable params
0 Non-trainable params
29.7 K Total params
0.119 Total estimated model params size (MB)
[New Thread 0x7ffbd1b4c700 (LWP 21845)]
[New Thread 0x7ffbd114b700 (LWP 21846)]
Epoch 0: 0%| | 0/31 [00:00<?, ?it/s][New Thread 0x7ffbb1fff700 (LWP 21871)]
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[New Thread 0x7ffba15fe700 (LWP 21878)]
Epoch 4: 100%|██████████████████████████████████████████████████████████████████████████████████████████| 31/31 [00:09<00:00, 3.44it/s, loss=132, v_num=1, train_loss_step=154.0, val_loss=192.0, train_loss_epoch=136.0]Trainer.fit stopped: max_epochs=5 reached.
Epoch 4: 100%|██████████████████████████████████████████████████████████████████████████████████████████| 31/31 [00:09<00:00, 3.38it/s, loss=132, v_num=1, train_loss_step=154.0, val_loss=192.0, train_loss_epoch=136.0]
[Thread 0x7ffbd1b4c700 (LWP 21845) exited]
[New Thread 0x7ffbd1b4c700 (LWP 22435)]
[Thread 0x7ffc84fe7700 (LWP 21788) exited]
[Thread 0x7ffc859e8700 (LWP 21787) exited]
[Thread 0x7ffc881ec700 (LWP 21784) exited]
[Thread 0x7ffc8baf2700 (LWP 21780) exited]
[Thread 0x7ffc8f6f8700 (LWP 21775) exited]
[Thread 0x7ffc8ecf7700 (LWP 21776) exited]
[Thread 0x7ffc8c4f3700 (LWP 21779) exited]
[Thread 0x7ffc88bed700 (LWP 21783) exited]
[Thread 0x7ffc863e9700 (LWP 21786) exited]
[Thread 0x7ffc900f9700 (LWP 21774) exited]
[Thread 0x7ffc83be5700 (LWP 21790) exited]
[Thread 0x7ffc813e1700 (LWP 21794) exited]
[Thread 0x7ffc81de2700 (LWP 21793) exited]
[Thread 0x7ffc831e4700 (LWP 21791) exited]
[Thread 0x7ffc827e3700 (LWP 21792) exited]
[Thread 0x7ffc8e2f6700 (LWP 21777) exited]
[Thread 0x7ffc86dea700 (LWP 21785) exited]
[Thread 0x7ffc845e6700 (LWP 21789) exited]
[Thread 0x7ffc895ee700 (LWP 21782) exited]
[Thread 0x7ffc914fb700 (LWP 21773) exited]
[Thread 0x7ffc8d8f5700 (LWP 21778) exited]
[Thread 0x7ffc8aff1700 (LWP 21781) exited]
[New Thread 0x7ffc8aff1700 (LWP 22436)]
[New Thread 0x7ffc8d8f5700 (LWP 22437)]
[New Thread 0x7ffc914fb700 (LWP 22438)]
[New Thread 0x7ffc900f9700 (LWP 22439)]
[New Thread 0x7ffc8f6f8700 (LWP 22440)]
[New Thread 0x7ffc8ecf7700 (LWP 22441)]
[New Thread 0x7ffc8e2f6700 (LWP 22442)]
[New Thread 0x7ffc8c4f3700 (LWP 22443)]
[New Thread 0x7ffc8baf2700 (LWP 22444)]
[New Thread 0x7ffc895ee700 (LWP 22445)]
[New Thread 0x7ffc88bed700 (LWP 22446)]
[New Thread 0x7ffc881ec700 (LWP 22447)]
[New Thread 0x7ffc86dea700 (LWP 22448)]
[New Thread 0x7ffc863e9700 (LWP 22449)]
[New Thread 0x7ffc859e8700 (LWP 22450)]
[New Thread 0x7ffc84fe7700 (LWP 22451)]
[New Thread 0x7ffc845e6700 (LWP 22452)]
[New Thread 0x7ffc83be5700 (LWP 22453)]
[New Thread 0x7ffc831e4700 (LWP 22454)]
[New Thread 0x7ffc827e3700 (LWP 22455)]
[New Thread 0x7ffc81de2700 (LWP 22456)]
[New Thread 0x7ffc813e1700 (LWP 22457)]
[Thread 0x7ffc827e3700 (LWP 22455) exited]
[Thread 0x7ffc83be5700 (LWP 22453) exited]
[Thread 0x7ffc8baf2700 (LWP 22444) exited]
[Thread 0x7ffc8c4f3700 (LWP 22443) exited]
[Thread 0x7ffc831e4700 (LWP 22454) exited]
[Thread 0x7ffc859e8700 (LWP 22450) exited]
[Thread 0x7ffc845e6700 (LWP 22452) exited]
[Thread 0x7ffc84fe7700 (LWP 22451) exited]
[Thread 0x7ffc895ee700 (LWP 22445) exited]
[Thread 0x7ffc813e1700 (LWP 22457) exited]
[Thread 0x7ffc8aff1700 (LWP 22436) exited]
[Thread 0x7ffc863e9700 (LWP 22449) exited]
[Thread 0x7ffc86dea700 (LWP 22448) exited]
[Thread 0x7ffc900f9700 (LWP 22439) exited]
[Thread 0x7ffc881ec700 (LWP 22447) exited]
[Thread 0x7ffc8d8f5700 (LWP 22437) exited]
[Thread 0x7ffc914fb700 (LWP 22438) exited]
[Thread 0x7ffc8f6f8700 (LWP 22440) exited]
[Thread 0x7ffc81de2700 (LWP 22456) exited]
[Thread 0x7ffc88bed700 (LWP 22446) exited]
[Thread 0x7ffc8ecf7700 (LWP 22441) exited]
[New Thread 0x7ffb98d39700 (LWP 22458)]
[Thread 0x7ffc8e2f6700 (LWP 22442) exited]
[New Thread 0x7ffc8e2f6700 (LWP 22459)]
[New Thread 0x7ffc8ecf7700 (LWP 22460)]
[New Thread 0x7ffc88bed700 (LWP 22461)]
[New Thread 0x7ffc914fb700 (LWP 22462)]
[New Thread 0x7ffc900f9700 (LWP 22463)]
[New Thread 0x7ffc8f6f8700 (LWP 22464)]
[New Thread 0x7ffc8d8f5700 (LWP 22465)]
[New Thread 0x7ffc8c4f3700 (LWP 22466)]
[New Thread 0x7ffc8baf2700 (LWP 22467)]
[New Thread 0x7ffc8aff1700 (LWP 22468)]
[New Thread 0x7ffc895ee700 (LWP 22469)]
[New Thread 0x7ffc881ec700 (LWP 22470)]
[New Thread 0x7ffc86dea700 (LWP 22471)]
[New Thread 0x7ffc863e9700 (LWP 22472)]
[New Thread 0x7ffc859e8700 (LWP 22473)]
[New Thread 0x7ffc84fe7700 (LWP 22474)]
[New Thread 0x7ffc845e6700 (LWP 22475)]
[New Thread 0x7ffc83be5700 (LWP 22476)]
[New Thread 0x7ffc831e4700 (LWP 22477)]
[New Thread 0x7ffc827e3700 (LWP 22478)]
[New Thread 0x7ffc81de2700 (LWP 22479)]
[Thread 0x7ffc827e3700 (LWP 22478) exited]
[Thread 0x7ffc845e6700 (LWP 22475) exited]
[Thread 0x7ffc84fe7700 (LWP 22474) exited]
[Thread 0x7ffc8c4f3700 (LWP 22466) exited]
[Thread 0x7ffc8f6f8700 (LWP 22464) exited]
[Thread 0x7ffc81de2700 (LWP 22479) exited]
[Thread 0x7ffc8d8f5700 (LWP 22465) exited]
[Thread 0x7ffc900f9700 (LWP 22463) exited]
[Thread 0x7ffc8baf2700 (LWP 22467) exited]
[Thread 0x7ffc881ec700 (LWP 22470) exited]
[Thread 0x7ffc831e4700 (LWP 22477) exited]
[Thread 0x7ffc83be5700 (LWP 22476) exited]
[Thread 0x7ffc8aff1700 (LWP 22468) exited]
[Thread 0x7ffc863e9700 (LWP 22472) exited]
[Thread 0x7ffc86dea700 (LWP 22471) exited]
[Thread 0x7ffc8ecf7700 (LWP 22460) exited]
[Thread 0x7ffc895ee700 (LWP 22469) exited]
[Thread 0x7ffc8e2f6700 (LWP 22459) exited]
[Thread 0x7ffc914fb700 (LWP 22462) exited]
[Thread 0x7ffb98d39700 (LWP 22458) exited]
[New Thread 0x7ffc859e8700 (LWP 22480)]
[Thread 0x7ffc859e8700 (LWP 22473) exited]
[Thread 0x7ffc88bed700 (LWP 22461) exited]
[New Thread 0x7ffc88bed700 (LWP 22481)]
[New Thread 0x7ffb98d39700 (LWP 22482)]
[New Thread 0x7ffc914fb700 (LWP 22483)]
[New Thread 0x7ffc900f9700 (LWP 22484)]
[New Thread 0x7ffc8f6f8700 (LWP 22485)]
[New Thread 0x7ffc8ecf7700 (LWP 22486)]
[New Thread 0x7ffc8e2f6700 (LWP 22487)]
[New Thread 0x7ffc8d8f5700 (LWP 22488)]
[New Thread 0x7ffc8c4f3700 (LWP 22489)]
[New Thread 0x7ffc8baf2700 (LWP 22490)]
[New Thread 0x7ffc8aff1700 (LWP 22491)]
[New Thread 0x7ffc895ee700 (LWP 22492)]
[New Thread 0x7ffc881ec700 (LWP 22493)]
[New Thread 0x7ffc86dea700 (LWP 22494)]
[New Thread 0x7ffc863e9700 (LWP 22495)]
[New Thread 0x7ffc84fe7700 (LWP 22496)]
[New Thread 0x7ffc845e6700 (LWP 22497)]
[New Thread 0x7ffc83be5700 (LWP 22498)]
[New Thread 0x7ffc831e4700 (LWP 22499)]
[New Thread 0x7ffc827e3700 (LWP 22500)]
[New Thread 0x7ffc81de2700 (LWP 22501)]
[Thread 0x7ffc81de2700 (LWP 22501) exited]
[Thread 0x7ffc8c4f3700 (LWP 22489) exited]
[Thread 0x7ffc8d8f5700 (LWP 22488) exited]
[Thread 0x7ffc831e4700 (LWP 22499) exited]
[Thread 0x7ffc86dea700 (LWP 22494) exited]
[Thread 0x7ffb98d39700 (LWP 22482) exited]
[Thread 0x7ffc8baf2700 (LWP 22490) exited]
[Thread 0x7ffc863e9700 (LWP 22495) exited]
[Thread 0x7ffc88bed700 (LWP 22481) exited]
[Thread 0x7ffc859e8700 (LWP 22480) exited]
[Thread 0x7ffc900f9700 (LWP 22484) exited]
[Thread 0x7ffc83be5700 (LWP 22498) exited]
[Thread 0x7ffc895ee700 (LWP 22492) exited]
[Thread 0x7ffc881ec700 (LWP 22493) exited]
[Thread 0x7ffc8aff1700 (LWP 22491) exited]
[Thread 0x7ffc914fb700 (LWP 22483) exited]
[Thread 0x7ffc84fe7700 (LWP 22496) exited]
[Thread 0x7ffc8ecf7700 (LWP 22486) exited]
[Thread 0x7ffc8e2f6700 (LWP 22487) exited]
[Thread 0x7ffc827e3700 (LWP 22500) exited]
[Thread 0x7ffc845e6700 (LWP 22497) exited]
[Thread 0x7ffc8f6f8700 (LWP 22485) exited]
[New Thread 0x7ffc8c4f3700 (LWP 22502)]
[New Thread 0x7ffc8f6f8700 (LWP 22503)]
[New Thread 0x7ffc845e6700 (LWP 22504)]
[New Thread 0x7ffc827e3700 (LWP 22505)]
[New Thread 0x7ffc914fb700 (LWP 22506)]
[New Thread 0x7ffc900f9700 (LWP 22507)]
[New Thread 0x7ffc8ecf7700 (LWP 22508)]
[New Thread 0x7ffc8e2f6700 (LWP 22509)]
[New Thread 0x7ffc8d8f5700 (LWP 22510)]
[New Thread 0x7ffc8baf2700 (LWP 22511)]
[New Thread 0x7ffc8aff1700 (LWP 22512)]
[New Thread 0x7ffc895ee700 (LWP 22513)]
[New Thread 0x7ffc88bed700 (LWP 22514)]
[New Thread 0x7ffc881ec700 (LWP 22515)]
[New Thread 0x7ffc86dea700 (LWP 22516)]
[New Thread 0x7ffc863e9700 (LWP 22517)]
[New Thread 0x7ffc859e8700 (LWP 22518)]
[New Thread 0x7ffc84fe7700 (LWP 22519)]
[New Thread 0x7ffc83be5700 (LWP 22520)]
[New Thread 0x7ffc831e4700 (LWP 22521)]
[New Thread 0x7ffc81de2700 (LWP 22522)]
[New Thread 0x7ffc813e1700 (LWP 22523)]
[Thread 0x7ffc813e1700 (LWP 22523) exited]
[Thread 0x7ffc83be5700 (LWP 22520) exited]
[Thread 0x7ffc8d8f5700 (LWP 22510) exited]
[Thread 0x7ffc900f9700 (LWP 22507) exited]
[Thread 0x7ffc827e3700 (LWP 22505) exited]
[Thread 0x7ffc845e6700 (LWP 22504) exited]
[Thread 0x7ffc859e8700 (LWP 22518) exited]
[Thread 0x7ffc86dea700 (LWP 22516) exited]
[Thread 0x7ffc8c4f3700 (LWP 22502) exited]
[Thread 0x7ffc881ec700 (LWP 22515) exited]
[Thread 0x7ffc8baf2700 (LWP 22511) exited]
[Thread 0x7ffc8ecf7700 (LWP 22508) exited]
[Thread 0x7ffc81de2700 (LWP 22522) exited]`

8

May I know if you find the solution to this error? I have exactly the same problem using Pytorch lightening and forecasting. I get the same segmentation error. Mine also works with one GPU.