Redis和Lua中的连接

Question

This is my config:

local rc = require("resty.redis.connector").new({
                connect_timeout = 50,
                read_timeout = 5000,
                keepalive_timeout = 30000
            })

            local redis, err1 = rc:connect({
                url = "redis://127.0.0.1:6379",
            })

            if not redis then
                ngx.say( err1)    
            else
                ngx.say('connection fine')    
            end

            local ok, err = rc:set_keepalive(redis)  

I'm getting this error:

[error] 4044#0: *1068056 attempt to send data on a closed socket: u:00007F2BABA05D48, c:0000000000000000, ft:0 eof:0, client: MY IP, server: , request: "GET /foo HTTP/1.1", host: "SERVER IP"

When I disable keepalive setting, get this error:

[error] 4147#0: *1089971 lua tcp socket connect timed out, when connecting to 127.0.0.1:6379,

When I comment out the line related to rc:set_keepalive it works on single requests and crashes on 100 requests.

What is the best practices for connecting to Redis in Lua under huge requests?

Answer 1

Most popular way of using redis in Lua is lua-resty-redis

Regarding [error] 4044#0: *1068056 attempt to send data on a closed socket I have experienced it when using set_timeouts(connect_timeout, send_timeout, read_timeout) method.

When I switched to set_timeout(time) method the error was gone.

I have not used lua-resty-redis-connector which I assume your are using in your code.

Answer 2

Your code is incorrect.

1. redis.new doesn't accept any parameters.
2. connect return ok, err . It doesn't make sense to pass ok value to set_keepalive .
3. set_keepalive accepts 2 numbers as parameters.

RTFM, please, all your code looks like one big mess, sorry.