I am not sure I am doing this right, but I thought that setting 

GRPC_VERBOSITY=ERROR

would only log ERROR(s) and no other output. Yet, when I run my test server 
I still get :

I0608 08:52:42.556181740   14891 server_builder.cc:247]      Synchronous 
server. Num CQs: 1, Min pollers: 1, Max Pollers: 2147483647, CQ timeout 
(msec): 1000

from :
std::unique_ptr<Server> server(builder.BuildAndStart());

setting :

GRPC_VERBOSITY=DEBUG yields:

I0608 08:59:31.004542606   16773 server_builder.cc:247]      Synchronous 
server. Num CQs: 1, Min pollers: 1, Max Pollers: 2147483647, CQ timeout 
(msec): 1000
I0608 08:59:31.004889970   16773 ev_epoll_linux.c:95]        epoll engine 
will be using signal: 40
D0608 08:59:31.004924123   16773 ev_posix.c:107]             Using polling 
engine: epoll
D0608 08:59:31.004997108   16773 dns_resolver.c:316]         Using native 
dns resolver

and GRPC_VERBOSITY=INFO

I0608 09:00:53.320764665   17119 server_builder.cc:247]      Synchronous 
server. Num CQs: 1, Min pollers: 1, Max Pollers: 2147483647, CQ timeout 
(msec): 1000
I0608 09:00:53.321138067   17119 ev_epoll_linux.c:95]        epoll engine 
will be using signal: 40
Server listening on 0.0.0.0:50051


So I am a bit confused as to why the LOG at server_builder.cc:247 seem to 
ignore the environment variable...any clue? 

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