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Handle ucp import error during initialize() #729

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Sep 20, 2021
Merged

Handle ucp import error during initialize() #729

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8 changes: 7 additions & 1 deletion dask_cuda/initialize.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,13 @@ def _create_cuda_context():
try:
# Added here to ensure the parent `LocalCUDACluster` process creates the CUDA
# context directly from the UCX module, thus avoiding a similar warning there.
distributed.comm.ucx.init_once()
try:
distributed.comm.ucx.init_once()
except ModuleNotFoundError:
# UCX intialization has to be delegated to Distributed, it will take care
# of setting correct environment variables and importing `ucp` after that.
# Therefore if ``import ucp`` fails we can just continue here.
pass

cuda_visible_device = int(
os.environ.get("CUDA_VISIBLE_DEVICES", "0").split(",")[0]
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