Problems encountered when using mmsegmentation framework:
File "C:\software\Anaconda3\envs\python36\lib\site-packages\torch\distributed\distributed_c10d.py", line 347, in _get_default_group
raise RuntimeError("Default process group has not been initialized, "
RuntimeError: Default process group has not been initialized, please make sure to call init_process_group.After debugging and positioning, it is found that there is a problem with the normalization of a convolution module:
self.linear_fuse = ConvModule(
in_channels=embedding_dim*4,
out_channels=embedding_dim,
kernel_size=1,
norm_cfg=dict(type='SyncBN', requires_grad=True)
)Norm here_ In CFG, if it is multi card training, use “syncbn”; If it is a single card training, change the type to ‘BN’.
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