mysql 主从架构的问题

120428 13:49:59 [Note] Slave I/O thread: connected to master 'repl@192.168.0.108:3306', replication started in log 'log.000001' at position 98
120428 14:06:32 [Note] Slave I/O thread killed while reading event
120428 14:06:32 [Note] Slave I/O thread exiting, read up to log 'log.000001', position 314
120428 14:06:32 [Note] Error reading relay log event: slave SQL thread was killed
120428 14:06:37 [Note] Slave SQL thread initialized, starting replication in log 'log.000001' at position 314, relay log './mysqld-relay-bin.000010' position: 445
120428 14:06:37 [Note] Slave I/O thread: connected to master 'repl@192.168.0.108:3306', replication started in log 'log.000001' at position 314

这是什么问题？