Repository: open-mmlab/mmdetection

Issue:
[Bug] Training Error
### Prerequisite

- [X] I have searched [Issues](https://github.com/open-mmlab/mmdetection/issues) and [Discussions](https://github.com/open-mmlab/mmdetection/discussions) but cannot get the expected help.
- [X] I have read the [FAQ documentation](https://mmdetection.readthedocs.io/en/latest/faq.html) but cannot get the expected help.
- [X] The bug has not been fixed in the [latest version (master)](https://github.com/open-mmlab/mmdetection) or [latest version (3.x)](https://github.com/open-mmlab/mmdetection/tree/dev-3.x).

### Task

I have modified the scripts/configs, or I'm working on my own tasks/models/datasets.

### Branch

master branch https://github.com/open-mmlab/mmdetection

### Environment

```
sys.platform: linux
Python: 3.7.15 (default, Nov 24 2022, 21:12:53) [GCC 11.2.0]
CUDA available: True
GPU 0,1,2,3,4,5,6,7: NVIDIA GeForce RTX 3090
CUDA_HOME: /usr/local/cuda
NVCC: Cuda compilation tools, release 11.6, V11.6.55
GCC: gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0
PyTorch: 1.13.1+cu117
PyTorch compiling details: PyTorch built with:
  - GCC 9.3
  - C++ Version: 201402
  - Intel(R) Math Kernel Library Version 2020.0.0 Product Build 20191122 for Intel(R) 64 architecture applications
  - Intel(R) MKL-DNN v2.6.0 (Git Hash 52b5f107dd9cf10910aaa19cb47f3abf9b349815)
  - OpenMP 201511 (a.k.a. OpenMP 4.5)
  - LAPACK is enabled (usually provided by MKL)
  - NNPACK is enabled
  - CPU capability usage: AVX2
  - CUDA Runtime 11.7
  - 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_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
  - CuDNN 8.5
  - Magma 2.6.1
  - Build settings: BLAS_INFO=mkl, BUILD_TYPE=Release, CUDA_VERSION=11.7, CUDNN_VERSION=8.5.0, CXX_COMPILER=/opt/rh/devtoolset-9/root/usr/bin/c++, CXX_FLAGS= -fabi-version=11 -Wno-deprecated -fvisibility-inlines-hidden -DUSE_PTHREADPOOL -fopenmp -DNDEBUG -DUSE_KINETO -DUSE_FBGEMM -DUSE_QNNPACK -DUSE_PYTORCH_QNNPACK -DUSE_XNNPACK -DSYMBOLICATE_MOBILE_DEBUG_HANDLE -DEDGE_PROFILER_USE_KINETO -O2 -fPIC -Wno-narrowing -Wall -Wextra -Werror=return-type -Werror=non-virtual-dtor -Wno-missing-field-initializers -Wno-type-limits -Wno-array-bounds -Wno-unknown-pragmas -Wunused-local-typedefs -Wno-unused-parameter -Wno-unused-function -Wno-unused-result -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 -Werror=cast-function-type -Wno-stringop-overflow, LAPACK_INFO=mkl, PERF_WITH_AVX=1, PERF_WITH_AVX2=1, PERF_WITH_AVX512=1, TORCH_VERSION=1.13.1, 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, USE_ROCM=OFF,

TorchVision: 0.14.1+cu117
OpenCV: 4.7.0
MMCV: 1.7.1
MMCV Compiler: GCC 9.3
MMCV CUDA Compiler: 11.7
MMDetection: 2.28.0+b955832
```

### Reproduces the problem - code sample

```python
python train.py $CONFIG_FILE
```

### Reproduces the problem - command or script

```python
python train.py $CONFIG_FILE
```

### Reproduces the problem - error message

```
/anaconda3/envs/dl/lib/python3.7/site-packages/mmcv/__init__.py:21: UserWarning: On January 1, 2023, MMCV will release v2.0.0, in which it will remove components related to the training process and add a data transformation module. In addition, it will rename the package names mmcv to mmcv-lite and mmcv-full to mmcv. See https://github.com/open-mmlab/mmcv/blob/master/docs/en/compatibility.md for more details.
  'On January 1, 2023, MMCV will release v2.0.0, in which it will remove '
Traceback (most recent call last):
  File "train.py", line 20, in <module>
    from mmdet.utils import (collect_env, get_device, get_root_logger,
ImportError: cannot import name 'rfnext_init_model' from 'mmdet.utils' (/mmdetection/mmdet/utils/__init__.py)
```

### Additional information

I clone the latest mmdetection package and intend to run a couple of benchmark. However, neither my configs nor the configs provided in the `mmdet/configs` yields the abovementioned error message.


Discussion:
I also encountered this problem

Resolving patch:
diff --git a/mmdet/utils/__init__.py b/mmdet/utils/__init__.py
--- a/mmdet/utils/__init__.py
+++ b/mmdet/utils/__init__.py
@@ -7,6 +7,7 @@
 from .memory import AvoidCUDAOOM, AvoidOOM
 from .misc import find_latest_checkpoint, update_data_root
 from .replace_cfg_vals import replace_cfg_vals
+from .rfnext import rfnext_init_model
 from .setup_env import setup_multi_processes
 from .split_batch import split_batch
 from .util_distribution import build_ddp, build_dp, get_device
@@ -16,5 +17,6 @@
     'update_data_root', 'setup_multi_processes', 'get_caller_name',
     'log_img_scale', 'compat_cfg', 'split_batch', 'build_ddp', 'build_dp',
     'get_device', 'replace_cfg_vals', 'AvoidOOM', 'AvoidCUDAOOM',
-    'get_max_num_gt_division_factor', 'masked_fill', 'batch_images_to_levels'
+    'get_max_num_gt_division_factor', 'masked_fill', 'batch_images_to_levels',
+    'rfnext_init_model'
 ]


Test patch: