heartbeat报错

Question

[root@node1 ~]# tail /var/log/ha-debug      
ipfail[18188]: 2011/04/23_20:10:58 debug: Other side is now stable.
heartbeat[18179]: 2011/04/23_22:12:22 WARN: duplicate client add request [ipfail] [21372]
heartbeat[18179]: 2011/04/23_22:12:22 ERROR: api_process_registration_msg: cannot add client()
heartbeat[18179]: 2011/04/23_22:12:28 WARN: duplicate client add request [ipfail] [21374]
heartbeat[18179]: 2011/04/23_22:12:28 ERROR: api_process_registration_msg: cannot add client()
heartbeat[22520]: 2011/04/23_23:00:38 info: Version 2 support: false
heartbeat[22520]: 2011/04/23_23:00:38 WARN: Logging daemon is disabled --enabling logging daemon is recommended
heartbeat[22520]: 2011/04/23_23:00:38 info: **************************
heartbeat[22520]: 2011/04/23_23:00:38 info: Configuration validated. Starting heartbeat 2.99.2
heartbeat[22520]: 2011/04/23_23:00:38 info: heartbeat: already running [pid 18179].
如上所示的WARN ERROR是怎么回事呀？