Docker 最近很火, 可以快速轻量级地虚拟出多个node,所以打算在Docker中跑Hadoop伪分布式应用. 其实要做出个简单的版本倒是不难,主要在 建立ssh无密码登录本机时,出现刚登录上去,立刻就退出来的问题. 解决办法如下: sudo ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key (一直回车) sudo ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key (一直回车) sudo cp /etc/…

Xshell 报错 : 1.有可能是IP和别人冲突,改一下IP就好了 2.也有可能是文件权限的问题.改一下: cd /etc/ssh/ chmod ssh_host_* chmod *.pub 3.也有可能是防火墙的问题 /etc/init.d/iptables status //先看一下防火墙状态 chkconfig iptables off //关闭的命令 或者: #停止firewall systemctl stop firewalld.service #禁止firewall开机启动 sys…

问题描写叙述: Cygwin好不easy安装好了ssh服务,第一连接没有问题,能够显示相关信息 $ ssh localhost Last login: Sat Jul 25 09:00:30 2015 from ::1 Administrator@LYX ~ $ who Administrator pty1         2015-07-25 09:03 (::1) 后来再打开cygwin: $ ssh localhost Cygwin ssh Connection closed by ::1…

Docker Hadoop 配置常见错误及解决办法 问题1:wordcount运行卡住,hadoop 任务运行到running job就卡住了 INFO mapreduce.Job: Running job: job_.... 解决如下: 1. 修改mapred-site.xml配置,配置文件在Hadoop安装目录下,etc/hadoop/mapred-site.xml 将以下配置 <property> <name>mapreduce.framework.name</name…

http://inuyasha1027.blog.51cto.com/4003695/1132896/ 主机ip:192.168.163.100(hostname: node0) ssh无密码登陆的远程机ip:192.168.163.101(hostname: node1) 首先要修改主机 和ssh连接到的远程机 的配置文件: vi  /etc/ssh/sshd_config (要确保这些字符前无注释符号"#") RSAAuthentication  yes PubkeyAuthent…

[WebException: The underlying connection was closed: The message length limit was exceeded.]   System.Net.HttpWebRequest.GetResponse() ; // unlimited…

一 Hadoop简介 Hadoop 2.7.2 Doc refer to http://hadoop.apache.org/docs/r2.7.2/ HDFS (The following is a subset of useful features in HDFS:) File permissions and authentication. Rack awareness: to take a node’s physical location into account while schedul…

使用WebClient 发送https请求 使用WebClient发送请求时,并且是以https协议: WebClient webClient = new WebClient(); string result = webClient.DownloadString(url); error : The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure chan…

写在前面 在模拟请求的时候,如果url为https的,会报这个错误.大概错误就是:基础连接已关闭:无法建立信任关系的SSL / TLS的安全通道. The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. 基础连接已关闭:无法建立信任关系的SSL / TLS的安全通道. 解决办法 在模拟请求的方法中加上这样一句话. ServicePoin…

windows xp .net framework 4.0 HttpWebRequest 报The underlying connection was closed,基础连接已关闭,错误的解决方法 在 HttpWebRequest 请求的上方加入以下代码 ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;…