try fix

Author: awaelchli

.azure-pipelines/gpu-tests.yml

@@ -53,6 +53,8 @@ jobs:
         pip install fairscale>=0.3.4
         pip install "deepspeed>=0.4.3, !=0.4.4" # FIXME: bug with 0.4.4
         pip install . --requirement requirements/devel.txt
+        pip uninstall protobuf
+        pip install --no-binary=protobuf protobuf
         pip list
       displayName: 'Install dependencies'
 

requirements.txt

@@ -6,7 +6,7 @@ future>=0.17.1  # required for builtins in setup.py
 tqdm>=4.41.0
 PyYAML>=5.1
 fsspec[http]>=2021.05.0, !=2021.06.0
-tensorboard>=2.2.0, !=2.5.0  # 2.5.0 GPU CI error: 'Couldn't build proto file into descriptor pool!'
+tensorboard==2.5.0
 torchmetrics>=0.4.1
 pyDeprecate==0.3.1
 packaging>=17.0