2022-07-18 07:06:13.957	[DEBUG]	[SDK]	v2@v2.2.1/sdk_cert_manage.go:22	[SDK] begin to get chain config
2022-07-18 07:06:13.961	[ERROR]	[SDK]	v2@v2.2.1/sdk_client.go:205	[SDK] call [0-127.0.0.1:12301-chainmaker.org] meet network error, try to connect another node if has, rpc error: code = Unavailable desc = connection error: desc = "transport: authentication handshake failed: struct invalid ecdsa signature"
2022-07-18 07:06:16.464	[ERROR]	[SDK]	examples/utils.go:191	[SDK] get cert hash failed, get cert hash failed, send QUERY_CONTRACT failed, all client connections are busy