本地环境是：linux centos6.5
软件包版本是：nginx version: openresty/1.9.7.5
问题一： mysql数据库频繁出现连接失败的情况，提示failed to receive packet header: 超时，并且出现lua tcp socket read timed out 问题，导致数据操作失败？
2016/07/08 10:07:08 [error] 4994#0: *52525 [lua] oldmysql.lua:25: connect(): failed to connect: failed to receive packet header: timeout: nil nil, client: 127.0.0.1, server: localhost, request: "POST /system/get_configs HTTP/1.1"
2016/07/08 10:07:08 [error] 4994#0: *52525 [lua] system.lua:118: format_prov_distance(): exec sql:select * from t_prov_distance failed, client: 127.0.0.1, server: localhost, request: "POST /system/get_configs HTTP/1.1"
2016/07/08 10:07:09 [error] 4994#0: *52525 lua tcp socket read timed out, client: 127.0.0.1, server: localhost, request: "POST /system/get_configs HTTP/1.1"
2016/07/08 10:07:09 [error] 4994#0: *52525 [lua] oldmysql.lua:25: connect(): failed to connect: failed to receive packet header: timeout: nil nil, client: 127.0.0.1, server: localhost, request: "POST /system/get_configs HTTP/1.1",
2016/07/08 10:07:10 [error] 4994#0: *52525 lua tcp socket read timed out, client: 127.0.0.1, server: localhost, request: "POST /system/get_configs HTTP/1.1"
2016/07/08 10:07:10 [error] 4994#0: *52525 [lua] oldmysql.lua:25: connect(): failed to connect: failed to receive packet header: timeout: nil nil, client: 127.0.0.1, server: localhost, request: "POST /system/get_configs HTTP/1.1"
2016/07/08 10:07:10 [error] 4994#0: *52525 [lua] system.lua:143: format_schedule_mapped(): exec sql:select * from t_schedule_mapped failed, client: 127.0.0.1, server: localhost, request: "POST /system/get_configs HTTP/1.1"
问题二： mysql数据库设置keepalive失败，频繁报错：
2016/07/02 23:54:27 [error] 45900#0: *4448031 [lua] oldmysql.lua:40: close(): set keepalive failed,err:cannot be reused in the current connection state: 2, client: 122.228.21.7, server: localhost, request: "POST /system/get_configs HTTP/1.1",
2016/07/02 23:54:27 [error] 45900#0: *4448030 [lua] oldmysql.lua:40: close(): set keepalive failed,err:cannot be reused in the current connection state: 2, client: 122.228.21.7, server: localhost, request: "POST /system/get_configs HTTP/1.1",
2016/07/02 23:54:27 [error] 45900#0: *4448031 [lua] oldmysql.lua:40: close(): set keepalive failed,err:cannot be reused in the current connection state: nil, client: 122.228.21.7, server: localhost, request: "POST /system/get_configs HTTP/1.1"
2016/07/02 23:54:27 [error] 45900#0: *4448031 [lua] oldmysql.lua:40: close(): set keepalive failed,err:cannot be reused in the current connection state: 2, client: 122.228.21.7, server: localhost, request: "POST /system/get_configs HTTP/1.1",
2016/07/02 23:54:27 [error] 45900#0: *4448032 [lua] oldmysql.lua:40: close(): set keepalive failed,err:cannot be reused in the current connection state: nil, client: 122.228.21.7, server: localhost, request: "POST /system/get_configs HTTP/1.1",
数据库操作语句;
===============================================
function connect(dbname)
local conn, err = mysql:new()
if not conn then
ngx.log(ngx.ERR, "fail to instantiate mysql,err:", err)
return nil, err
end
conn:set_timeout(1000) -- 1 second
local ok, err, errno, sqlstate = conn:connect({
host = mysql_host,
port = mysql_port,
database = dbname,
user = mysql_user,
password = mysql_passwd,
max_packet_size = mysql_max_packet_size
})
if not ok then
ngx.log(ngx.ERR, "failed to connect: ", err, ": ", errno, " ", sqlstate)
return nil, err
end
ngx.log(ngx.DEBUG, "connect to mysql success ...")
return conn, nil
end
==================================================
function close(conn)
if not conn then
return
end
local ok, err = conn:set_keepalive(10000, 20)
if not ok then
ngx.log(ngx.ERR, "set keepalive failed,err:", err)
end
end
是我的lua操作数据库语句写的不对么？求大神们指点；
