when I train deeplabv3plus with my own dataset, there is a error:AttributeError: EncoderDecoder: ResNetV1c: 'super' object has no attribute '_specify_ddp_gpu_num'

[KenRamzes]

Thanks for your error report and we appreciate it a lot.

Checklist

1. I have searched related issues but cannot get the expected help.
2. The bug has not been fixed in the latest version.

Describe the bug
A clear and concise description of what the bug is.

Reproduction

1. What command or script did you run?
   “
   bash ./tools/dist_train.sh configs/deeplabv3plus/woodscape/deeplabv3plus_r50-d8_769x769_80k_woodscape.py 4
   ”

2. Did you make any modifications on the code or config? Did you understand what you have modified?
   yes, I customze a dataset and load it, but there is a error with sytnBN

3. What dataset did you use?
   Environment

sys.platform: linux
Python: 3.7.0 (default, Oct 9 2018, 10:31:47) [GCC 7.3.0]
CUDA available: True
GPU 0,1,2,3,4,5,6,7: NVIDIA GeForce RTX 3090
CUDA_HOME: /usr/local/cuda
NVCC: Build cuda_11.1.TC455_06.29190527_0
GCC: gcc (GCC) 7.3.0
PyTorch: 1.9.0
PyTorch compiling details: PyTorch built with:

• GCC 7.3
• C++ Version: 201402
• Intel(R) oneAPI Math Kernel Library Version 2021.3-Product Build 20210617 for Intel(R) 64 architecture applications
• Intel(R) MKL-DNN v2.1.2 (Git Hash 98be7e8afa711dc9b66c8ff3504129cb82013cdb)
• OpenMP 201511 (a.k.a. OpenMP 4.5)
• NNPACK is enabled
• CPU capability usage: AVX2
• CUDA Runtime 11.1
• NVCC architecture flags: -gencode;arch=compute_37,code=sm_37;-gencode;arch=compute_50,code=sm_50;-gencode;arch=compute_60,code=sm_60;-gencode;arch=compute_61,code=sm_61;-gencode;arch=compute_70,code=sm_70;-gencode;arch=compute_75,code=sm_75;-gencode;arch=compute_80,code=sm_80;-gencode;arch=compute_86,code=sm_86;-gencode;arch=compute_37,code=compute_37
• CuDNN 8.0.5
• Magma 2.5.2
• Build settings: BLAS_INFO=mkl, BUILD_TYPE=Release, CUDA_VERSION=11.1, CUDNN_VERSION=8.0.5, CXX_COMPILER=/opt/rh/devtoolset-7/root/usr/bin/c++, CXX_FLAGS= -Wno-deprecated -fvisibility-inlines-hidden -DUSE_PTHREADPOOL -fopenmp -DNDEBUG -DUSE_KINETO -DUSE_FBGEMM -DUSE_QNNPACK -DUSE_PYTORCH_QNNPACK -DUSE_XNNPACK -DSYMBOLICATE_MOBILE_DEBUG_HANDLE -O2 -fPIC -Wno-narrowing -Wall -Wextra -Werror=return-type -Wno-missing-field-initializers -Wno-type-limits -Wno-array-bounds -Wno-unknown-pragmas -Wno-sign-compare -Wno-unused-parameter -Wno-unused-variable -Wno-unused-function -Wno-unused-result -Wno-unused-local-typedefs -Wno-strict-overflow -Wno-strict-aliasing -Wno-error=deprecated-declarations -Wno-stringop-overflow -Wno-psabi -Wno-error=pedantic -Wno-error=redundant-decls -Wno-error=old-style-cast -fdiagnostics-color=always -faligned-new -Wno-unused-but-set-variable -Wno-maybe-uninitialized -fno-math-errno -fno-trapping-math -Werror=format -Wno-stringop-overflow, LAPACK_INFO=mkl, PERF_WITH_AVX=1, PERF_WITH_AVX2=1, PERF_WITH_AVX512=1, TORCH_VERSION=1.9.0, USE_CUDA=ON, USE_CUDNN=ON, USE_EXCEPTION_PTR=1, USE_GFLAGS=OFF, USE_GLOG=OFF, USE_MKL=ON, USE_MKLDNN=ON, USE_MPI=OFF, USE_NCCL=ON, USE_NNPACK=ON, USE_OPENMP=ON,

TorchVision: 0.10.0
OpenCV: 4.5.3
MMCV: 1.3.8
MMCV Compiler: GCC 7.3
MMCV CUDA Compiler: 11.1
MMSegmentation: 0.17.0+56e18ba

Error traceback

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./tools/train.py", line 170, in <module>
    main()
  File "./tools/train.py", line 137, in main
    test_cfg=cfg.get('test_cfg'))
  File "/mnt/data-1/data/junrui.xiao/mmsegmentation/mmseg/models/builder.py", line 49, in build_segmentor
    cfg, default_args=dict(train_cfg=train_cfg, test_cfg=test_cfg))
  File "/home/junrui.xiao/anaconda3/envs/mmlab/lib/python3.7/site-packages/mmcv/utils/registry.py", line 210, in build
    return self.build_func(*args, **kwargs, registry=self)
  File "/home/junrui.xiao/anaconda3/envs/mmlab/lib/python3.7/site-packages/mmcv/cnn/builder.py", line 26, in build_model_from_cfg
    return build_from_cfg(cfg, registry, default_args)
  File "/home/junrui.xiao/anaconda3/envs/mmlab/lib/python3.7/site-packages/mmcv/utils/registry.py", line 54, in build_from_cfg
    raise type(e)(f'{obj_cls.__name__}: {e}')
AttributeError: EncoderDecoder: ResNetV1c: 'super' object has no attribute '_specify_ddp_gpu_num'

Bug fix

If you have already identified the reason, you can provide the information here. If you are willing to create a PR to fix it, please also leave a comment here and that would be much appreciated!

[xvjiarui]

Hi @KenRamzes
Please use the latest MMCV. It is fixed in open-mmlab/mmcv#1138

[KenRamzes]

Hi @KenRamzes
Please use the latest MMCV. It is fixed in open-mmlab/mmcv#1138

thanks，It works！！