前端连接dbproxy报警mysql has gone away,直接mysql是正常的

[beebol]

dbproxy报如下错误
2017-06-27 09:23:30.852151: (message)proxy-percentile.c:336(check_percentile)check_percentile thread start
2017-06-27 09:23:30.856027: (message)chassis-event-thread.c:382(chassis_event_threads_start)starting 16 threads
2017-06-27 09:23:30.880070: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(1) C:192.168.9.104:22805 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:30.880172: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(2) C:192.168.9.104:22807 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:30.880488: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(4) C:192.168.9.104:22813 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:30.880546: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(3) C:192.168.9.104:22811 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:30.880590: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(6) C:192.168.9.104:22818 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:30.880643: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(5) C:192.168.9.104:22816 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:30.880680: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(8) C:192.168.9.104:22823 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:30.880730: (debug)network-mysqld.c:1247(network_mysqld_con_handle): event_thread(7) C:192.168.9.104:22821 C_usr: CON_STATE_READ_AUTH close both sides because of client was closed unexpectedly.
2017-06-27 09:23:31.851345: (message)proxy-plugin.c:3444(check_state)check_state thread start

2017-06-27 09:27:53.898319: (critical)network-mysqld.c:1249(network_mysqld_con_handle): event_thread(15) C:192.168.9.104:23004 C_usr:zabbix_rw CON_STATE_READ_QUERY close both sides because of client was closed unexpectedly.