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[Bug]: dstack server fails to start with smg_grpc_proto RuntimeError with grpcio<1.81 #3957
Description
Steps to reproduce
- Install dstack in a fresh environment with any grpcio version <1.81:
uv pip install 'grpcio<1.81'
uv pip install 'dstack[all]==0.20.24' --refresh
dstack serverfails withRuntimeError: The grpc package installed is at version 1.80.0, but the generated code in mlx_engine_pb2_grpc.py depends on grpcio>=1.81.0.
Apparently smg_grpc_proto works only with the latest grpcio==1.81.0 version.
Actual behaviour
No response
Expected behaviour
Figure out if older grpcio versions can be supported. If not, specify grpcio>=1.81.0.
dstack version
master
Server logs
File "/Users/r4victor/Projects/dstack/venvt/lib/python3.12/site-packages/dstack/_internal/server/services/runs/router_worker_sync.py", line 17, in <module>
from smg_grpc_proto import (
File "/Users/r4victor/Projects/dstack/venvt/lib/python3.12/site-packages/smg_grpc_proto/__init__.py", line 10, in <module>
from smg_grpc_proto.generated import (
File "/Users/r4victor/Projects/dstack/venvt/lib/python3.12/site-packages/smg_grpc_proto/generated/mlx_engine_pb2_grpc.py", line 21, in <module>
raise RuntimeError(
RuntimeError: The grpc package installed is at version 1.80.0, but the generated code in mlx_engine_pb2_grpc.py depends on grpcio>=1.81.0. Please upgrade your grpc module to grpcio>=1.81.0 or downgrade your generated code using grpcio-tools<=1.80.0.Additional information
No response
Activity
Bihan commentedon Jun 16, 2026
#3971 fixes the issue