fix when rpc reports "transport is closing" error, health check go routine will exit Upstream-commit: e103125883ec3c03a8523682ed62f33d04e0ade9 Component: engine
fix when rpc reports "transport is closing" error, health check go routine will exit Upstream-commit: e103125883ec3c03a8523682ed62f33d04e0ade9 Component: engine