Improve management of gRPC channels #782
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Description
Resolves #780
A recent certificate expiration event exposed a defect where unmanaged gRPC channels can cause an increase in TCP connection requests. This PR corrects the connection management issues and allows for proper backoff during failure events.
BEFORE FIX - TCP connection attempts for 50 agents during a certificate event:
WITH FIX - TCP connection attempts for 50 agents during a certificate event:
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