[目的]====================================================== 在ubuntu16上安裝R和hadoop環境 並用rhdfs和rmr2執行簡單範例 [問題]====================================================== (問題1):在library(rmr2)時會出現錯誤訊息: Please review your hadoop settings. See help(hadoop.settings) (問題2):library(rhdfs)後 init.hdfs()出現錯誤訊息: 17/01/11 17:20:17 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 猜或許是hadoop streaming設置錯了?? [安裝過程]==================================================== 啟動hadoop cd ~/hadoop && sbin/start-all.sh ----------------------------------------------------------------------------- 裝r在master就好 sudo apt-get update sudo apt-get upgrade sudo apt-get install r-base java 設訂----------------------------------------------------------- echo $JAVA_HOME sudo JAVA_HOME=/usr/lib/jvm/jdk/ R CMD javareconf in the R------------------------------------------------------------- 進入R sudo R install.packages(c("codetools","R","Rcpp","RJSONIO","bitops","digest","functional","stringr","plyr","reshape2","rJava","caTools")) 下載rmr(用於mapreduce 和 rhabse) wget --no-check-certificate https://raw.github.com/RevolutionAnalytics/rmr2/3.3.0/build/rmr2_3.3.0.tar.gz wget --no-check-certificate https://raw.github.com/RevolutionAnalytics/rhdfs/master/build/rhdfs_1.0.8.tar.gz 在R中 --------------------------------------------------------------------------------------- $sudo R install.packages("/home/hduser/rhdfs_1.0.8.tar.gz", repos=NULL, type="source") install.packages("/home/hduser/rmr2_3.3.0.tar.gz", repos = NULL, type="source") 安裝影片如下: https://www.youtube.com/watch?v=w70h_u8qoHM&t=680s [路徑設置/網路資料]===================================================== 參考一些網路資料 都無法決解這問題 發現很多討論都跟HADOOP_STREAMING路徑設置有關@@ @資料一 http://stackoverflow.com/questions/29682432/r-mapreduce-library-rmr2-shows-a-warning-message-when-loaded 這篇提到要在R中重設Sys.setenv的路徑跟我完全不一樣 感覺也不是我的問題 @資料二 https://github.com/RevolutionAnalytics/RHadoop/issues/122 這篇還沒開始看,英文好吃力 @資料三 https://github.com/RevolutionAnalytics/rmr2/issues/155 這篇跟我的問題非常像,但我還是看不太懂,而他設的路徑也跟我不一樣@@ >small.ints = to.dfs(1:10) >mapr = mapreduce(input = small.ints, map = function(k,v) cbind(v,v^2)) 會有 Streaming Command Failed! Error in ... hadoop streaming failed with error code 5 不知是什麼意思>"< 以下是我設的路徑: Sys.setenv(HADOOP_HOME="/home/hduser/hadoop") Sys.setenv(HADOOP_PREFIX="/home/hduser/hadoop") Sys.setenv(HADOOP_CMD="/home/hduser/hadoop/bin/hadoop") Sys.setenv(HADOOP_STREAMING="/home/hduser/hadoop/share/hadoop/tools/lib/hadoop-streaming-2.7.3.jar") 不知是哪錯的... 在hadoop/logs也看不太懂錯誤是什麼QAQ 希望大大們幫看一下我HADOOP_STREAMING設置是否有錯?或怎麼看錯誤 或是哪出錯了>"< --

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