Register auth timeout

GatewayWorker 采用分布式部署,有2台机器，2个register服务，web01和web02，web01报register注册超时，查了文档也没发现问题所在，求助。
报错如下：
2021-12-31 13:20:32 pid:25942 Register auth timeout (172.17.1.31). See http://doc2.workerman.net/register-auth-timeout.html
2021-12-31 13:20:41 pid:25942 Register auth timeout (172.17.1.32). See http://doc2.workerman.net/register-auth-timeout.html
2021-12-31 13:20:42 pid:25942 Register auth timeout (172.17.1.32). See http://doc2.workerman.net/register-auth-timeout.html
pid 25942是websocket的 00:00:00 WorkerMan: worker process Register text://172.17.1.31:1237

web01(172.17.1.31)配置如下：
register_ip = 172.17.1.31,172.17.1.32
lan_ip = 172.17.1.31
tcp_port = 9218
websocket_port = 9219
gateway_process_count = 4
businessWorker_process_count = 12

web02(172.17.1.32)配置如下：
register_ip = 172.17.1.31,172.17.1.32
lan_ip = 172.17.1.32
tcp_port = 9218
websocket_port = 9219
gateway_process_count = 4
businessWorker_process_count = 12

服务正常可用，就是时不时的报这个错误。