<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_751914788的博客]]></title><description><![CDATA[活到老,学到老... 技术无止境,一个来自菜鸟的心声]]></description><link>https://blog.youkuaiyun.com/qq_36498237</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_36498237]]></copyright><item><title><![CDATA[【Java和数据结构】]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/126221520</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/126221520</guid><author>qq_36498237</author><pubDate>Mon, 08 Aug 2022 17:14:06 +0800</pubDate><description><![CDATA[java数据结构基础]]></description><category></category></item><item><title><![CDATA[IDEA拉去git项目更新，出现问题：No tracked branch configured for branch master or the branch doesn‘t exist.]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/110729191</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/110729191</guid><author>qq_36498237</author><pubDate>Sat, 05 Dec 2020 23:40:04 +0800</pubDate><description><![CDATA[No tracked branch configured for branch master or the branch doesn’t exist. To make your branch track a remote branch call, for example, git branch --set-upstream-to=origin/master master
翻译：没有为分支主节点配置跟踪分支，或者分支不存在.为了使您的分支跟踪远程分支,如何做？例如，在IDEA的terminal输入git br]]></description><category></category></item><item><title><![CDATA[HQL中join、 inner join、left join、left  outer join、left semi join 、right join 、right outer join]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/104881367</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/104881367</guid><author>qq_36498237</author><pubDate>Sun, 15 Mar 2020 18:02:27 +0800</pubDate><description><![CDATA[概念：
（1）hive中的join就是inner join内连接，也称为等值连接，join是inner join的简写。
（2）hive中的left outer join 就是左连接left join，left join 是left outer join的简写。
（3）hive中的right outer join 就是右连接right join，right join 是right outer jo...]]></description><category></category></item><item><title><![CDATA[centos6.8安装jdk1.8的时候，安装好了还显示1.7如何处理]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/103830528</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/103830528</guid><author>qq_36498237</author><pubDate>Sat, 04 Jan 2020 10:35:33 +0800</pubDate><description><![CDATA[which java ——查看默认的jdk安装路径（一般是这个影响）

cd /usr/bin到这个安装目录下，然后sudo rm -rf java 删除默认的java
which javac

cd /usr/bin到这个安装目录下，然后sudo rm -rf javac 删除默认的javac
java -version 检验是否成功
如果配置了jdk1.8的环境变量，我们可以创建软链接
sud...]]></description><category></category></item><item><title><![CDATA[CentOs关闭防火墙以及设置开启不启动]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/103818503</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/103818503</guid><author>qq_36498237</author><pubDate>Fri, 03 Jan 2020 12:52:57 +0800</pubDate><description><![CDATA[centos6 关闭防火墙
service iptables stop
防火墙开机自启动关闭
chkconfig iptables off

]]></description><category></category></item><item><title><![CDATA[cdh安装之linux克隆虚拟机]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/103606814</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/103606814</guid><author>qq_36498237</author><pubDate>Thu, 19 Dec 2019 00:09:21 +0800</pubDate><description><![CDATA[centos6 关闭防火墙
service iptables stop
防火墙开机自启动关闭
chkconfig iptables off
关闭虚拟机
init 0
克隆
选择虚拟机，右键管理-克隆
选择虚拟机的当前状态

创建完整的连接

给克隆的虚拟机命名，选择克隆的虚拟机安放的位置

修改下uuid，更改网卡名
vi /etc/udev/rules.d/70-persistent-net.r...]]></description><category></category></item><item><title><![CDATA[Zeppelin连接hive报错java.sql.SQLException: org.apache.thrift.transport.TTransportException: java.net.Soc]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/101028131</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/101028131</guid><author>qq_36498237</author><pubDate>Thu, 19 Sep 2019 17:05:45 +0800</pubDate><description><![CDATA[Zeppelin连接hive报错java.sql.SQLException: org.apache.thrift.transport.TTransportException: java.net.SocketException: Broken pipe (Write failed) at
问题描述：第一天用得好好的，第二天就直接报错Broken pipe (Write failed)
报错详情
ja...]]></description><category></category></item><item><title><![CDATA[Scala学习二(01),Scala集合,元组,Araay,Set,List,Map及常用方法]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/99693156</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/99693156</guid><author>qq_36498237</author><pubDate>Sat, 17 Aug 2019 15:03:56 +0800</pubDate><description><![CDATA[匿名函数演示
package date0813.sample01_AnonymousFunDemo

/**
  * Description;匿名函数演示&lt;br/&gt;
  * Copyright(c):Minchen&lt;br/&gt;
  * This program is protected by copyright laws.&lt;br/&gt;
  * Date:  2019...]]></description><category></category></item><item><title><![CDATA[Scala学习一(03),常量变量,快表达式,条件表达式,循环表达式,方法,函数...]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/99690662</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/99690662</guid><author>qq_36498237</author><pubDate>Sat, 17 Aug 2019 11:16:32 +0800</pubDate><description><![CDATA[变量
1.声明变量
package com.mc

object Variable {
  def main(args: Array[String]): Unit = {
    //使用val定义的变量值是不变的,相当于java中用final修饰的变量
    val i= 1
    //使用var定义的变量是可变的,scala建议用val
    var s="hello"
    //sc...]]></description><category></category></item><item><title><![CDATA[Scala学习一(01),创建项目,配置pom.xml,开始第一个scala程序]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/99342856</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/99342856</guid><author>qq_36498237</author><pubDate>Sat, 17 Aug 2019 09:22:47 +0800</pubDate><description><![CDATA[第一个scala程序


package FirstScala
object FirstScala {
def main(args: Array[String]): Unit = {
print(“hello scala”)
}
}
变量
1.声明变量
package com.mc
object Variable {
def main(args: Array[String]): Unit = {
...]]></description><category></category></item><item><title><![CDATA[java面试多线程之synchronized题目,任意实例对象Object的拓展,String.intern()作为锁,实现同一时间段打印两个不同的字符串]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/99584771</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/99584771</guid><author>qq_36498237</author><pubDate>Wed, 14 Aug 2019 16:56:48 +0800</pubDate><description><![CDATA[java面试多线程之synchronized题目
问题:请问synchronized()里面应该填什么,要求:字符串"美女"只能进入一个，不同字符串可以进入，"帅哥"同时也只能进入一个。
分析:题意要求是,同一时间段相同字符串不能够存在两个,也就是不能出现{“美女”“美女”},{“帅哥”“帅哥”},要求每次打印的字符串是{“美女”“帅哥”}或者{“帅哥”“美女”},每次打印这两种
package ...]]></description><category></category></item><item><title><![CDATA[Scala学习一(01),什么是scala,scala优点,scala安装]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/99327681</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/99327681</guid><author>qq_36498237</author><pubDate>Mon, 12 Aug 2019 19:32:12 +0800</pubDate><description><![CDATA[1.什么是scala
作者:瑞士桑兰马丁教授 发行于2001年
1.它是面向对象的
2.scala是一种多范式的编程语言,初衷是集成面向对象编程和函数编程的各种特性
(范式（programming paradigm），指的是计算机编程的基本风格或典范模式,也可以理解为是编程的思想,例如"面向过程,"面向对象"就是两种不同的范式.多范式就是兼具多种范式,例如既能面向对象也能面向过程)
3.Scala...]]></description><category></category></item><item><title><![CDATA[10-08-2019 10:32:02 CST load_data_ods_incr ERROR - Failed to build job executor for job load_data_od]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/99060242</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/99060242</guid><author>qq_36498237</author><pubDate>Sat, 10 Aug 2019 10:58:54 +0800</pubDate><description><![CDATA[Azkabn运行报错
10-08-2019 10:32:02 CST load_data_ods_incr ERROR - Failed to build job executor for job load_data_ods_incrCould not find variable substitution for variable(s) [command-&gt;ui_dt]
10-08-2019...]]></description><category></category></item><item><title><![CDATA[19/08/10 10:33:55 ERROR tool.BaseSqoopTool: Error parsing arguments for import: 19/08/10 10:33:55 ER]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/99059788</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/99059788</guid><author>qq_36498237</author><pubDate>Sat, 10 Aug 2019 10:52:05 +0800</pubDate><description><![CDATA[19/08/10 10:33:55 ERROR tool.BaseSqoopTool: Error parsing arguments for import:
19/08/10 10:33:55 ERROR tool.BaseSqoopTool: Unrecognized argument:
报错原因:
在linux上运行脚本是报错,脚本是用IDEA在windows下写的,windows的换行符合...]]></description><category></category></item><item><title><![CDATA[HIVE FAILED: ParseException line 2:68 cannot recognize input near '$' '{' 'hivevar' in constant]]></title><link>https://blog.youkuaiyun.com/qq_36498237/article/details/98966148</link><guid>https://blog.youkuaiyun.com/qq_36498237/article/details/98966148</guid><author>qq_36498237</author><pubDate>Fri, 09 Aug 2019 16:38:15 +0800</pubDate><description><![CDATA[HIVE FAILED: ParseException line 2:68 cannot recognize input near ‘$’ ‘{’ ‘hivevar’ in constant
传入的参数或设置的参数有问题,或未定义参数或未传入参数,会报此类错误
解决办法
1.检查脚本的参数
2.传入正确的参数
3.hql执行脚本时,要将hql和shell脚本放在同一个目录下,传入参数重新执行

...]]></description><category></category></item></channel></rss>