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Observed Error

When compiling or running models, users may see this error message intermittently: 
Error parsing metadata: error=invalid value key=content-type value=text/html

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Explanation

This error message is a bug in GRPC and should not affect the outcome of a run.

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Work around

You can disable the error message by setting this environment variable: 
$ export GRPC_VERBOSITY=NONE
This will hide all log messages from GRPC. This setting will remove ALL logs coming from GRPC and has not been thoroughly validated.