我正在尝试使用 Sparklyr 将 R 连接到 Spark。
我遵循了来自 rstudio 博客的教程
我尝试使用安装 sparklyr
install.packages("sparklyr")一切顺利，但在另一篇文章中，我看到 sparklyr_0.4 版本中有一个错误。所以我按照说明下载开发版本使用devtools::install_github("rstudio/sparklyr")这也很好，现在我的 sparklyr 版本是 sparklyr_0.4.16。
我按照 rstudio 教程下载和安装 spark 使用
spark_install(version = "1.6.2")
当我尝试使用第一次连接到火花时
sc <- spark_connect(master = "local")
得到以下错误。
Created default hadoop bin directory under: C:\Users\rkaku\AppData\Local\rstudio\spark\Cache\spark-1.6.2-bin-hadoop2.6\tmp\hadoop
Error:
To run Spark on Windows you need a copy of Hadoop winutils.exe:
1. Download Hadoop winutils.exe from:
https://github.com/steveloughran/winutils/raw/master/hadoop-2.6.0/bin/
2. Copy winutils.exe to C:\Users\rkaku\AppData\Local\rstudio\spark\Cache\spark-1.6.2-bin-hadoop2.6\tmp\hadoop\bin
Alternatively, if you are using RStudio you can install the RStudio Preview Release,
which includes an embedded copy of Hadoop winutils.exe:
https://www.rstudio.com/products/rstudio/download/preview/**
然后我下载了 winutils.exe 并将其放入C:\Users\rkaku\AppData\Local\rstudio\spark\Cache\spark-1.6.2-bin-hadoop2.6\tmp\hadoop\bin- 这是在说明中给出的。
我尝试再次连接火花。
sc <- spark_connect(master = "local",version = "1.6.2")
但我收到以下错误
Error in force(code) :
Failed while connecting to sparklyr to port (8880) for sessionid (8982): Gateway in port (8880) did not respond.
Path: C:\Users\rkaku\AppData\Local\rstudio\spark\Cache\spark-1.6.2-bin-hadoop2.6\bin\spark-submit2.cmd
Parameters: --class, sparklyr.Backend, --packages, "com.databricks:spark-csv_2.11:1.3.0", "C:\Users\rkaku\Documents\R\R-3.2.3\library\sparklyr\java\sparklyr-1.6-2.10.jar", 8880, 8982
Traceback:
shell_connection(master = master, spark_home = spark_home, app_name = app_name, version = version, hadoop_version = hadoop_version, shell_args = shell_args, config = config, service = FALSE, extensions = extensions)
start_shell(master = master, spark_home = spark_home, spark_version = version, app_name = app_name, config = config, jars = spark_config_value(config, "spark.jars.default", list()), packages = spark_config_value(config, "sparklyr.defaultPackages"), extensions = extensions, environment = environment, shell_args = shell_args, service = service)
tryCatch({
gatewayInfo <- spark_connect_gateway(gatewayAddress, gatewayPort, sessionId, config = config, isStarting = TRUE)
}, error = function(e) {
abort_shell(paste("Failed while connecting to sparklyr to port (", gatewayPort, ") for sessionid (", sessionId, "): ", e$message, sep = ""), spark_submit_path, shell_args, output_file, error_file)
})
tryCatchList(expr, classes, parentenv, handlers)
tryCatchOne(expr, names, parentenv, handlers[[1]])
value[[3]](cond)
abort_shell(paste("Failed while connecting to sparklyr to port (", gatewayPort, ") for sessionid (", sessionId, "): ", e$message, sep = ""), spark_submit_path, shell_args, output_file, error_file)
---- Output Log ----
The system cannot find the path specified.
有人可以帮我解决这个问题。从过去的两周开始，我一直在处理这个问题，没有太多帮助。非常感谢任何可以帮助我解决这个问题的人。