it's normal semi-sync replication? (1 reply)

I am new in mysql replication, now i setup master - master semi-sync on mysql 5.5.

can anyone review mysql log like below: it's normal? i set rpl_semi_sync_master_timeout=1000 # 1s. but every hour semi-sync always stop and start again.

131027 6:47:18 [Note] Stop semi-sync binlog_dump to slave (server_id: 4)
131027 7:01:32 [Note] Start semi-sync binlog_dump to slave (server_id: 4), pos(mysql-bin.000008, 6437)
131027 7:01:32 [Note] Semi-sync replication switched ON with slave (server_id: 4) at (mysql-bin.000008, 7281)
131027 8:01:32 [Note] Stop semi-sync binlog_dump to slave (server_id: 4)
131027 8:01:32 [Note] Start semi-sync binlog_dump to slave (server_id: 4), pos(mysql-bin.000008, 7281)


Detail mysqllog.err : http://pastebin.com/pgAUC0Br

Thank you.