<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[caoyaqi的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/u010989078</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; u010989078]]></copyright><item><title><![CDATA[hadoop2.7.2中datanode无法启动，日志报错java.net.BindException: Port in use: localhost:0]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/76177309</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/76177309</guid><author>u010989078</author><pubDate>Thu, 27 Jul 2017 11:21:05 +0800</pubDate><description><![CDATA[namenode启动正常，每个从节点上nodemanager也正常启动，就是从节点上服务datanode无法全部正常启动，有时候只有一个节点上的datanode起来了，其他都没启动，或者从节点上的datanode全部无法启动，在slave节点上查看日志  vi hadoop-root-datanode-slave2.log 发现日志中报有如下错误：
java.net.BindException:]]></description><category></category></item><item><title><![CDATA[Java从hdfs上读取文件中的某一行]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/51790166</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/51790166</guid><author>u010989078</author><pubDate>Thu, 30 Jun 2016 14:35:49 +0800</pubDate><description><![CDATA[package test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.apache]]></description><category></category></item><item><title><![CDATA[在虚拟机centos系统中，eclipse无法加载hadoop插件]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/51777837</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/51777837</guid><author>u010989078</author><pubDate>Tue, 28 Jun 2016 18:10:45 +0800</pubDate><description><![CDATA[在centos中，将hadoop-eclipse-plugin-1.2.1.jar放入eclipse的plugins的文件夹中，但是，eclipse无法加载hadoop-eclipse-plugin-1.2.1.jar，使得eclipse中Windows->Preferences中没有Hadoop Map/Reduce选项：（即hadoop插件没有加载上，eclipse无法对作业进行集群提交）
]]></description><category></category></item><item><title><![CDATA[在虚拟机Centos6.5中，eclipse总是闪退]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/51777780</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/51777780</guid><author>u010989078</author><pubDate>Tue, 28 Jun 2016 18:01:51 +0800</pubDate><description><![CDATA[据说eclipse闪退是和Firefox浏览器的插件不兼容造成的


在eclipse安装目录中编辑eclipse.ini
加入以下几句话保存
-Dorg.eclipse.swt.browser.DefaultType=mozilla
-Dorg.eclipse.swt.browser.UseWebKitGTK=true
重启eclipse问题解决]]></description><category></category></item><item><title><![CDATA[SpringMVC+Hibernate将连接oracle的数据库换成MySQL，报错如何解决]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/51743846</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/51743846</guid><author>u010989078</author><pubDate>Thu, 23 Jun 2016 15:32:14 +0800</pubDate><description><![CDATA[将连接oracle的数据库换成MySQL，一般情况下需要更换的配置有：hibernate.dialect=org.hibernate.dialect.MySQLDialect  、connection.driver_class=com.mysql.jdbc.Driver 、connection.url=jdbc:mysql://10.61.8.23:3306/DB ；更换完这些配置后启动tomca]]></description><category></category></item><item><title><![CDATA[Zabbix 安装配置文档Server+Client+Web]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/50480448</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/50480448</guid><author>u010989078</author><pubDate>Fri, 08 Jan 2016 09:25:38 +0800</pubDate><description><![CDATA[在网上找了很多配置文档，有些不全，有些有错，下面这些都是亲身实践过的，供参考
配置环境：CentOS7，zabbix2.4.7

一、Zabbix的部署准备
1、LAMP环境准备与配置
这里的依赖包均通过yum安装
#yum -y install gcc gcc-c++ autoconf httpd php mysqlmysql-server php-mysql httpd-manua]]></description><category></category></item><item><title><![CDATA[hadoop中有时运行会提示mapper找不到]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/50338121</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/50338121</guid><author>u010989078</author><pubDate>Thu, 17 Dec 2015 10:35:29 +0800</pubDate><description><![CDATA[当hadoop运行时出现mapper找不到，或者不存在：可以把该java文件打jar包
比如：运行WorldCount.java文件时，出现上述错误，则可以将该Java文件export出jar格式，再把该jar包buildpath
----------------------------------------------------------------------------------]]></description><category></category></item><item><title><![CDATA[在hadoop中如何进入本地调试、及如何设置split的大小]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/50328667</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/50328667</guid><author>u010989078</author><pubDate>Wed, 16 Dec 2015 15:36:14 +0800</pubDate><description><![CDATA[//在mapreduce中，如果想进入debug模式进行调试，则需要在main函数中去掉下面一行代码：Configuration conf = new Configuration();conf.set("mapred.job.tracker", "master:9001");//这行不能要，否则进入集群模式，不能单步调试，不设置jobtracker默认进入本地模式//在hadoop中设置每个spl]]></description><category></category></item><item><title><![CDATA[Hadoop MapReduce处理小的压缩文件：基于CombineFileInputFormat]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/50291747</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/50291747</guid><author>u010989078</author><pubDate>Mon, 14 Dec 2015 10:50:44 +0800</pubDate><description><![CDATA[处理压缩小文件的，不是压缩文件，代码也是可以用的，只是这时候每个split是一个小文件
其他就不在多说了，只是提供3个java文件，也只是些参考
CompressedCombineFileInputFormat .java
package compressedCombineFile;

import java.io.IOException;

import org.apache.ha]]></description><category></category></item><item><title><![CDATA[Hadoop MapReduce处理海量小文件：基于CombineFileInputFormat（每次往map中读入1行）]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/50291537</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/50291537</guid><author>u010989078</author><pubDate>Mon, 14 Dec 2015 10:39:29 +0800</pubDate><description><![CDATA[后来想想还是把CombineFileInputFormat每次读入一行的代码附上吧
CombineSmallfileRecordReader .java



package CombineLine;


import java.io.IOException;


import org.apache.hadoop.fs.Path;
import org.apache.had]]></description><category></category></item><item><title><![CDATA[Hadoop MapReduce处理海量小文件：基于CombineFileInputFormat（整个小文件读入到map中）]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/50291247</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/50291247</guid><author>u010989078</author><pubDate>Mon, 14 Dec 2015 10:21:51 +0800</pubDate><description><![CDATA[CombinFIleInputFormat通常默认情况下是把合并后的文件一行一行读入到map中，在CombineSmallfileRecordReader中屏蔽的地方是一行一行读入到map中的,这里给改成了每次往map中读入整篇文章


CombineSmallfileInputFormat.java

package combinAllFile;

import java.io.I]]></description><category></category></item><item><title><![CDATA[Hadoop MapReduce处理海量小文件（每次整个小文件整体读入到map）：基于FileInputFormat]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/50290771</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/50290771</guid><author>u010989078</author><pubDate>Mon, 14 Dec 2015 09:43:08 +0800</pubDate><description><![CDATA[WholeFileInputFormat .java   中的代码如下：


package AllFileInput;


import java.io.IOException;


import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.NullWritable;
import org.]]></description><category></category></item><item><title><![CDATA[StringTokenizer类的使用]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/49814027</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/49814027</guid><author>u010989078</author><pubDate>Fri, 13 Nov 2015 10:18:24 +0800</pubDate><description><![CDATA[StringTokenizer是一个用来分隔String的应用类，相当于VB的split函数。
1.构造函数
public StringTokenizer(String str)
public StringTokenizer(String str, String delim)
public StringTokenizer(String str, String delim, boolean ]]></description><category></category></item><item><title><![CDATA[每3秒轮换下一张图片，鼠标可以选中数字换图片，在网上找了好多js写的代码，但是粘上之后总是实现不了效果，这是完整代码，粘上之后完全能使用，方便大家使用（这是jquery实现的翻动功能，需要先下载个jq]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/48489073</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/48489073</guid><author>u010989078</author><pubDate>Wed, 16 Sep 2015 09:08:33 +0800</pubDate><description><![CDATA[http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
http://www.w3.org/1999/xhtml">
  
    http://sdia.ncut.edu.cn:80/" />
    大规模流数据集成与分析技术北京市重点实验室
 
 
     
 
 
 
  *{ font-size:12px]]></description><category></category></item><item><title><![CDATA[实现图片轮流滑动]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/48442689</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/48442689</guid><author>u010989078</author><pubDate>Mon, 14 Sep 2015 17:59:20 +0800</pubDate><description><![CDATA[在jsp页面中添加动作，实现图片轮流滑动]]></description><category></category></item><item><title><![CDATA[在extjs的textfield中输入带有特殊字符的字符串，比如/opt/apache-storm-0.9.4/bin/storm ui &但是&符号却无法传递到后台]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/48153185</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/48153185</guid><author>u010989078</author><pubDate>Tue, 01 Sep 2015 08:45:09 +0800</pubDate><description><![CDATA[在ext中
{                                
                                    xtype:'textfield',
                                    hideLabel:true,
                                    width:'270',]]></description><category></category></item><item><title><![CDATA[extjs 中formPanel提交到action后返回json数据到ext中，但是ext页面不进入sucess也不进入failure]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/47975713</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/47975713</guid><author>u010989078</author><pubDate>Tue, 25 Aug 2015 13:41:28 +0800</pubDate><description><![CDATA[extjs 中formPanel提交到action后返回json数据到ext中，但是ext页面不进入sucess也不进入failure的解决方案]]></description><category></category></item><item><title><![CDATA[tomcat无法连接，./shutdown.sh的时候报connect refuse]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/47949959</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/47949959</guid><author>u010989078</author><pubDate>Mon, 24 Aug 2015 13:46:35 +0800</pubDate><description><![CDATA[10.61.5.37:9080  发现tomcat无法打开，停止的时候又拒绝连接，开启的时候显示启动，  应该输入jps  查看启动了几个tomcat，然后kill 掉已启动的bot的pid，重新启动tomcat就行了，有的时候会启动的时间比较长]]></description><category></category></item><item><title><![CDATA[在extjs 的tree中联动修改页面，但是页面不出来，还报ct is null或者...is no function]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/47812855</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/47812855</guid><author>u010989078</author><pubDate>Thu, 20 Aug 2015 18:46:03 +0800</pubDate><description><![CDATA[单击这个叶子激活页面之后，再激活其他叶子的页面就冲突，页面就不出来，有时候还报错]]></description><category></category></item><item><title><![CDATA[在写extjs中一个panel里放了3个grid，但就是不显示页面，后台给出数据，前台也有加载数据]]></title><link>https://blog.youkuaiyun.com/u010989078/article/details/47787015</link><guid>https://blog.youkuaiyun.com/u010989078/article/details/47787015</guid><author>u010989078</author><pubDate>Wed, 19 Aug 2015 20:25:00 +0800</pubDate><description><![CDATA[在写extjs中一个panel里放了3个grid，但就是不显示页面，后台给出数据，前台也有加载数据]]></description><category></category></item></channel></rss>