Lots of redis connection in time wait.

[ikouchiha47]

Hi,
I have a code like this:

function _M.get_redis(config, host, port)
  local red = redis:new()
  red:set_keepalive(config.redis_keepalive_in_milliseconds, config.redis_pool_size)

  logger.debug("GoJek-Auth", "Trying to conntect to Redis")
  local ok, _, err = pcall(red.connect, red, host, port)

  if not ok or err ~= nil then
    ngx.log(ngx.ERR, err)
    return nil, errors.ERR_REDIS_CONNECTION
  else
    return red, nil
  end
end

-- another file
-- codes
--
--
local red, err = utils.get_redis(config, config.customer_token_redis_host, config.customer_token_redis_port)
  if err then
    logger.error("Auth", "could not connect to redis.")
    _M.authServiceResponse(config, token)
   red:close()
  end

where pool size is 50 and timeout is 20k ms. But when I do this.. netstat -an | grep TIME_WAIT | grep 6379 | wc -l it yields 28k , and I get a lot of cannot assign address..

I have also enabled tcp_tw_reuse and tcp_tw_recycle .. Why is this happening ? Does red:close() return the connection to the pool ?

[bjoe2k4]

Please read the documentation more carefully. set_keepalive returns the connection to the pool, while close actually closes the connection. set_keepalive is usually called AFTER you have executed your redis queries. Also why do you connect using pcall?