Why does alpha still connect to localshost:5080 after specifying the zero parameter?

Use the following command to start dgraph alpha

bash -c 'set -ex && dgraph alpha --lru_mb 42943 --zero 172.16.5.240:5080 --my dgraph-alpha:7080 --bindall --whitelist 0.0.0.0/0'
I1127 04:26:59.599471      16 run.go:581] gRPC server started.  Listening on port 9080
I1127 04:26:59.599891      16 run.go:582] HTTP server started.  Listening on port 8080
I1127 04:26:59.698327      16 pool.go:160] CONNECTING to 172.16.5.240:5080
I1127 04:26:59.704739      16 pool.go:160] CONNECTING to localhost:5080
W1127 04:26:59.705551      16 pool.go:254] Connection lost with localhost:5080. Error: rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: connection error: desc = "transport: Error while dialing dial tcp 127.0.0.1:5080: connect: connection refused"
E1127 04:27:00.599993      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E1127 04:27:01.600160      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E1127 04:27:02.600280      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E1127 04:27:03.600400      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
I1127 04:27:04.599618      16 admin.go:593] Error reading GraphQL schema: Please retry again, server is not ready to accept requests.
E1127 04:27:04.600520      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E1127 04:27:05.600689      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E1127 04:27:06.600833      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E1127 04:27:07.600960      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E1127 04:27:08.601110      16 groups.go:1140] Error during SubscribeForUpdates for prefix "\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
I1127 04:27:09.599771      16 admin.go:593] Error reading GraphQL schema: Please retry again, server is not ready to accept requests.

This log is too confusing. The reason is that the my parameter is not configured when zero is started for the first time.
Maybe there is an inconsistency warning or some explanation in alpha?