常用指令集合：0. 配置 Hadoop 的 PATH 变量：vim ~/.bashrcexport PATH=$PATH:/usr/local/hadoop/bin:/usr/local/hadoop/sbin1. 启动 Hadoop：start-dfs.shstart-yarn.shmr-jobhistory-daemon.sh start historyserver...

问题说明Ubuntu安装高版本MySQL数据库连接的时候会出现警告：WARN: Establishing SSL connection without server's identity verification is not recommended.详情：WARN: Establishing SSL connection without server's identity v...

问题描述java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset.本地远程连接 Hadoop 集群异常，日志如下：java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset.at org.apache.had...

配置redis集群中遇到的简单问题。原因：对应的服务器节点上的redis服务没有开启集群模式。解决方式：1.关闭此节点的redis服务。2.修改对应服务器redis的配置文件：cluster-enabled yesappendonly yes3.以加载此配置文件的方式启动redis服务。./redis-server redis-6661.conf4.启动服务后，查看redis进程，可以看到最后有

When you’re using Maven in an IDE you often find the need for your IDE to resolve source code and Javadocs for your library dependencies. There’s an easy way to accomplish that goal.// 在idea的Terminal中

一.contos 上安装 anacondahttps://blog.csdn.net/mysteryflower/article/details/93064195二. anaconda 安装第三方包普通安装：conda install XXX第三方推荐安装：conda install -c anaconda py-xgboost网站安装：conda install --...

springboot整合mybatis时出现的问题如下：根据提示缺少 MySQL 链接驱动导致，在 pom 文件中添加如下：<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><ve...

问题描述Unexpected character '=' (code 61); expected a semi-colon after the reference for entity 'useUnicodexml 文件中出现特殊字符，需要转义。错误原因在XML文档中的所有文本都会被解析器解析，非法的 XML 字符必须被替换为实体引用（entity reference）。假如您...

错误问题Invalid bound statement (not found)错误日志如下：org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.demo.zhulong.base.dao.ImagesMapper.selectByPrimaryKeyat org....

错误日志如下：java.lang.AbstractMethodError: org.mybatis.spring.transaction.SpringManagedTransaction.getTimeout()Ljava/lang/Integer;at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleEx...