using namespace 数学工具构造器;

安装Hadoop下载安装 Hadoop# 下载，移动目录wget https://apachemirror.sg.wuchna.com/hadoop/common/hadoop-3.1.4/hadoop-3.1.4.tar.gztar -xzvf hadoop-3.1.4.tar.gzsudo mv hadoop-3.1.4/ /usr/local/ sudo ln -sf /usr/local/hadoop-3.1.4 /usr/local/hadoopsudo chown -R tqc

Java视频教程完整的gRPC课程（The complete gRPC course）

import java.awt._ // 引入包内所有成员 def handler(evt: event.ActionEvent) { // java.awt.event.ActionEvent ... // 因为引入了java.awt，所以可以省去前面的部分}import java.awt.{Color, Font} // 重命名成员import java.util.{HashMap => JavaHashMap} // 隐藏成员import java.util.{..

spark运维问题记录启动HDFS， yarn$ start-all.sh # NameNodeStarting namenodes on [0.0.0.0]0.0.0.0: Warning: Permanently added '0.0.0.0' (ECDSA) to the list of known hosts.# DataNodeStarting datanodeslocalhost: Warning: Permanently added 'localhost' (ECDSA) to

Linux下安装

因为我瞎搞把apt-get弄坏了，导致我没法用apt-get安装软件但是我发现了新大陆，conda貌似可以安装大部分常用软件，包括redis，mongodb，postgresql等conda activate askconda install -c conda-forge postgresql -ypg_ctl -D /home/tqc/miniconda3/envs/ask/var/po...

下个mongodb，但只用客户端：http://downloads.mongodb.org/linux/mongodb-linux-x86_64-ubuntu1604-v4.2-latest.tgzexport PATH=$PATH:/usr/local/hive/binexport MONGODB_HOME=/usr/local/mongodb export PATH=$PATH:$...

https://blog.youkuaiyun.com/fuck487/article/details/80859581hdfs-site.xml <property> <name>dfs.http.address</name> <value>0.0.0.0:50070</value...

https://mvnrepository.com/artifact/mysql/mysql-connector-javahttps://www.cnblogs.com/xiaolan-Lin/p/11358901.html

在vscode中，安装xml-tools后按Cltr-Alt-L可以格式化xmlRUN apt install openjdk-8* -y，jdk路径为export JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"获取某个容器的ipimport jsonimport osfrom pathlib import Pathif __name_...

var x=if(true){1}else{2} for(x <- 1 until 10 if x !=8;y<-1 to 10 if y!=8 ;if x+y!=8){ println(x,y) } var list=List(1,2,3,4,5,6) for(l<-list){ println(l) } ...

原代码 Path output = new Path(args[1]); FileSystem fs = FileSystem.get(conf); if (fs.exists(output)) { fs.delete(output, true); }修改后 Path output = ne...

安装Java8https://blog.youkuaiyun.com/zdxxinlang/article/details/84616438修改/usr/local/hadoop/etc/hadoop/hadoop-env.shexport JAVA_HOME="/usr/lib/jvm/java-1.8.0-openjdk"修改/usr/local/hadoop/etc/hadoop/yarn-s...

我的Scala版本为2.13，但是我还是按2.12来配置<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 ...

su hadoopstart-dfs.shstart-yarn.shsu tqcstart-master.shstart-slaves.sh

找不到类的错误https://blog.youkuaiyun.com/hongxiao2016/article/details/88919176Maven依赖https://blog.youkuaiyun.com/a_____lan/article/details/94339946