Hadoop 2.6 + Hive 1.2.1 + spark-1.4.1(1)

备注： 

hadoop-2.6.0-src.tar.gz是源码压缩文件。

能够用eclipse导入研究源码，或者Maven构建编译打包。 hadoop-2.6.0.tar.gz是已经官方发布版压缩包，能够直接使用。

不过官网下载的hadoop发布版本只适合x86环境，若要x64的则须要Maven从新构建。

 *.mds 是描述文件，记录压缩包的MD5，SHA1等信息。

1) 配置服务器的 hostname/ hosts的映射关系

[jiangzl@master hadoop]$ cat /etc/hostname 

master

[jiangzl@master hadoop]$ cat /etc/hosts

192.168.1.114 master

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

[jiangzl@master hadoop]$ 

 

2) 远程本机的 hosts

     (mac)

bogon:~ jiangzl$ 

bogon:~ jiangzl$ cat /etc/hosts

##

# Host Database

#

# localhost is used to configure the loopback interface

# when the system is booting.  Do not change this entry.

##

127.0.0.1   localhost   bogon

255.255.255.255   broadcasthost

::1             localhost

192.168.1.114 master

    (window 7)

在window中配置:主机名对应的ip

C:\Windows\System32\drivers\etc\hosts

192.168.1.114 master

3)  CentOS关闭防火墙:

CentOS 7.0默认使用的是firewall做为防火墙，这里改成iptables防火墙。

firewall：

systemctl status firewalld.service  #查看firewall状态

 

[jiangzl@localhost ~]$ systemctl status firewalld.service

firewalld.service - firewalld - dynamic firewall daemon

   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled)

   Active: active (running) since 四 2015-09-24 13:30:25 CST; 2 weeks 6 days ago

 Main PID: 879 (firewalld)

   CGroup: /system.slice/firewalld.service

           └─879 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

 

systemctl start firewalld.service  #启动firewall

 

systemctl stop firewalld.service   #中止firewall

[jiangzl@localhost ~]$ systemctl status firewalld.service

firewalld.service - firewalld - dynamic firewall daemon

   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled)

   Active: inactive (dead) since 三 2015-10-14 22:05:20 CST; 4min 12s ago

  Process: 879 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS)

 Main PID: 879 (code=exited, status=0/SUCCESS)

 

systemctl disable firewalld.service  #禁止firewall开机启动

[jiangzl@localhost ~]$ systemctl status firewalld.service     

firewalld.service - firewalld - dynamic firewall daemon

   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled)

   Active: inactive (dead)

4)  SSH免密码登陆

ssh免密码登录

(1)执行命令ssh-keygen -t rsa （而后一路Enter）  产生秘钥位于 ~/.ssh/

(2)执行命令cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys  产生受权文件

(3)验证:ssh master  (ssh 主机名)

5) 配置hadoop/java 环境变量

[jiangzl@localhost ~]$ vim .bash_profile

 

#hadoop

export HADOOP_PREFIX=/home/jiangzl/work/hadoop

export HADOOP_HOME=/home/jiangzl/work/hadoop

export PATH=$PATH:$HADOOP_PREFIX/bin

 

# others

export JAVA_HOME=/home/jiangzl/work/jdk

 

export PATH=$PATH:$JAVA_HOME/bin

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

 

[jiangzl@localhost ~]$ source .bash_profile

 

[jiangzl@master work]$ java -version

java version "1.7.0_79"

Java(TM) SE Runtime Environment (build 1.7.0_79-b15)

Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

[jiangzl@master work]$

 

linux安装jdk后发现系统带有openjdk的处理 (直接卸载)

操做步骤:

http://jingyan.baidu.com/article/73c3ce28f0f68fe50343d9e1.html

6) 配置hadoop 的配置文件

官方文档：

http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-common/SingleCluster.html

案例测试：

mkdir input

bin/hdfs dfs -put LICENSE.txt input

bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar wordcount input output

hadoop fs -cat output/p*

6) JAVA_HOME is not set

[jiangzl@master hadoop]$ sbin/start-dfs.sh

Starting namenodes on [master]

master: Error: JAVA_HOME is not set and could not be found.

localhost: Error: JAVA_HOME is not set and could not be found.

Starting secondary namenodes [0.0.0.0]

0.0.0.0: Error: JAVA_HOME is not set and could not be found.

[jiangzl@master hadoop]$

 

Hadoop安装完后，启动时报Error: JAVA_HOME is not set and could not be found.

解决办法：

    修改 etc/hadoop/hadoop-env.sh中设JAVA_HOME。

    应当使用绝对路径。

    export JAVA_HOME=$JAVA_HOME     //错误，不能这么改

export JAVA_HOME=/usr/java/jdk        //正确，应该这么改

7) 解决NameNode没法打开

Hadoop 伪分布模式下关机后，fs端口链接不上问题解决方案

老是报出异常以下所示：

13/07/24 09:14:24 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)

13/07/24 09:14:25 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)

解决方案：

1.首先删除 /tmp/hadoop-username/dfs/目录下的东西，并格式化namenode

2.属性hadoop.tmp.dir是hadoop文件系统依赖的基础配置，不少路径都依赖它。它默认的位置是在/tmp/{$user}下面，在local和hdfs都会建有相同的目录，可是在/tmp路径下的存储是不安全的，由于linux一次重启，文件就可能被删除。致使namenode启动不起来。所以须要在core-site.xml下 添加以下字段

<property>

  <name>hadoop.tmp.dir</name>

  <value>/home/jiangzl/work/hadoop/tmp</value>

</property>

3,注意关机前须要stop-all.sh

公益hive视频资料分享：

连接: http://pan.baidu.com/s/1jGKZKSe 密码: 1zty 

hive课程中－ hive视频－HIVE（1）安装mysql部分.avi  （会讲hadoop的安装，经过官网）