Question

我试图在运行Ubuntu 14.04和R 3.2.2的AWS EC2实例上使用mclappy并行使用ua-parser的R实现。我似乎无法解决问题。任何帮助，将不胜感激。

运行以下工作就好了。

parsed_ua <- as.data.frame(parse_agents(data))

然而，当我尝试并行运行该过程时，我遇到了障碍，并且导致的警告消息没有信息。

parsed_ua <- 
  do.call(
    rbind, mclapply(
      split(data, rep(1:5,each=2)), 
       function(x){
         x <- as.data.frame(parse_agents(x))
         return(x)
         }, mc.cores = 5))

返回

In mclapply(split(data, rep(1:5,each=2)), function(x) { :
  all scheduled cores encountered errors in user code

以下是一些示例数据：

data <- c("Mozilla/5.0 (Linux; Android 4.4.2; en-us; SAMSUNG-SGH-I537 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/1.5 Chrome/28.0.1500.94 Mobile Safari/537.36",
    "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.115 Safari/537.36",
    "Mozilla/5.0 (iPhone; CPU iPhone OS 8_1_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B466 Safari/600.1.4",
    "Mozilla/5.0 (iPhone; CPU iPhone OS 8_1_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B466 Safari/600.1.4",
    "Mozilla/5.0 (iPhone; CPU iPhone OS 8_1_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B466 Safari/600.1.4",
    "Mozilla/5.0 (iPad; U; CPU OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5",
    "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0",
    "Mozilla/5.0 (Linux; Android 4.4.2; en-us; SAMSUNG-SGH-I537 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/1.5 Chrome/28.0.1500.94 Mobile Safari/537.36",
    "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko",
    "Mozilla/5.0 (iPhone; CPU iPhone OS 8_1_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B466 Safari/600.1.4"
    )

ua-parser适用于单线程，多线程时失败

0 个答案: