2.3.5 解决ssh name01失败的问题
[Hadoop@data01 ~]$ ssh name01
Last login: Thu Aug 21 02:25:28 2014 from localhost.localdomain
[hadoop@data01 ~]$
确实没有成功，退出来看看/etc/hosts的设置
[hadoop@data01 ~]$ exit
logout
[root@data01 ~]#
[root@data01 ~]# vim /etc/hosts
#127.0.0.1 localhost.localdomain localhost.localdomain localhost4 localhost4.localdomain4 localhost name01
#::1 localhost.localdomain localhost.localdomain localhost6 localhost6.localdomain6 localhost name01
localhost.localdomain=data01
192.168.52.128 name01
192.168.52.129 data01
192.168.52.130 data02
保存退出
[root@data01 ~]# su - hadoop
[hadoop@data02 ~]$ ssh name01
Warning: Permanently added the RSA host key for IP address '192.168.52.128' to the list of known hosts.
Last login: Thu Aug 21 02:32:32 2014 from data01
[hadoop@name01 ~]$
OK，ssh远程连接name01成功，解决方法vim hosts注释掉前面两行搞定，如下所示：
[root@data01 ~]# vim /etc/hosts
#127.0.0.1 localhost.localdomain localhost.localdomain localhost4 localhost4.localdomain4 localhost name01
#::1 localhost.localdomain localhost.localdomain localhost6 localhost6.localdomain6 localhost name01
2.3.6 验证name01、data01、data02任何ssh免密码登录
[hadoop@data02 ~]$ ssh name01
Last login: Thu Aug 21 02:38:46 2014 from data02
[hadoop@name01 ~]$ ssh data01
Last login: Thu Aug 21 02:30:35 2014 from localhost.localdomain
[hadoop@data01 ~]$ ssh data02
Last login: Thu Aug 21 02:32:57 2014 from localhost.localdomain
[hadoop@data02 ~]$ ssh data01
Last login: Thu Aug 21 02:39:55 2014 from name01
[hadoop@data01 ~]$ ssh name01
Last login: Thu Aug 21 02:39:51 2014 from data02
[hadoop@name01 ~]$ ssh data02
Last login: Thu Aug 21 02:39:58 2014 from data01
[hadoop@data02 ~]$
3，安装部署hadoop环境
3.1 java环境准备
root账户所有节点部署java环境：
安装jdk7版本，请参考：
3.2，安装hadoop
3.2.1 版本2.2.0安装
下载软件包：
mkdir /s
chown -R hadoop.hadoop /soft
从本地copy到linux虚拟机
su - hadoop
cd /soft/hadoop
tar zxvf hadoop-2.3.0-x64.tar.gz -C /home/hadoop/src/
配置环境变量：
使用root设置环境变量
cat <<EOF>> /etc/profile
export HADOOP_HOME=/home/hadoop/src/hadoop-2.3.0
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_60/
export PATH=/home/hadoop/src/hadoop-2.3.0/bin:/home/hadoop/src/hadoop-2.3.0/sbin:$PATH
EOF
source /etc/profile
3.3，hadoop配置文件
hadoop群集涉及配置文件：hadoop-env.sh core-site.xml hdfs-site.xml mapred-site.xml yarn-env.sh slaves yarn-site.xml
涉及到的配置文件有7个：
cp /home/hadoop/src/hadoop-2.3.0/etc/hadoop
hadoop-env.sh
yarn-env.sh
slaves
core-site.xml
hdfs-site.xml
mapred-site.xml
yarn-site.xml
以上个别文件默认不存在的，可以复制相应的template文件获得
a.修改hadoop-env.sh配置：
vim hadoop-env.sh
增加java环境变量
export JAVA_HOME="/usr/lib/jvm/jdk1.7.0_60"
b.修改yarn-env.sh配置：
vim yarn-env.sh
修改java_home值为 export JAVA_HOME="/usr/lib/jvm/jdk1.7.0_60"
c.修改slaves配置,写入所有从节点主机名：
vim slaves
data01
data02
d.修改core-site.xml配置文件:
vim core-site.xml
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://name01:9000</value>
</property>
<property>
<name>io.file.buffer.size</name>
<value>131072</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/data/hadoop/tmp</value>
<description>A base for other temporary directories.</description>
</property>
<property>
<name>hadoop.proxyuser.hduser.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hduser.groups</name>
<value>*</value>
</property>
</configuration>
e.修改hdfs-site.xml配置：
创建相关目录
mkdir -p /data/hadoop/name
chown -R hadoop.hadoop /data/hadoop/name
mkdir -p /data/hadoop/data
chown -R hadoop.hadoop /data/hadoop/data
vim hdfs-site.xml
<configuration>
<property>
<name>dfs.namenode.secondary.http-address</name>
<value>name01:9001</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/data/hadoop/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/data/hadoop/data</value>
</property>
<property>
<name>dfs.replication</name>
<value>3</value>
<description>storage copy number</description>
</property>
<property>
<name>dfs.webhdfs.enabled</name>
<value>true</value>
</property>
</configuration>
f.修改mapred-site.xml配置
#这个文件不存在，需要自己VIM创建
vim mapred-site.xml
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.jobhistory.address</name>
<value>name01:10020</value>
</property>
<property>
<name>mapreduce.jobhistory.webapp.address</name>
<value>name01:19888</value>
</property>
# <property>
# <name>mapred.job.tracker</name>
# <value>name01:9001</value>
# <description>JobTracker visit path</description>
# </property>
</configuration>
g.修改yarn-site.xml配置：
vim yarn-site.xml
<configuration>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
<value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
<property>
<name>yarn.resourcemanager.address</name>
<value>name01:8032</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>name01:8030</value>
</property>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>name01:8031</value>
</property>
<property>
<name>yarn.resourcemanager.admin.address</name>
<value>name01:8033</value>
</property>
<property>
<name>yarn.resourcemanager.webapp.address</name>
<value>name01:8088</value>
</property>
</configuration>
所有节点采用相同的配置文件和安装目录，直接整个目录copy过去安装把name01上面的所有hadoop目录copy到data02上面去：
scp -r /home/hadoop/* hadoop@data02:/home/hadoop/
scp -r /data/hadoop/* hadoop@data02:/data/hadoop/
把name01上面的所有hadoop目录copy到data01上面去：
scp -r /home/hadoop/* hadoop@data01:/home/hadoop/
scp -r /data/hadoop/* hadoop@data01:/data/hadoop/
3.3，格式化文件系统
在name01主库上面执行 hadoop namenode -format操作，格式化hdfs文件系统。
su - hadoop
[hadoop@localhost ~]$ hadoop namenode -format
[hadoop@name01 bin]$ hadoop namenode -format
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.
14/08/21 04:51:20 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = name01/192.168.52.128
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 2.3.0
STARTUP_MSG: classpath = /home/hadoop/src/hadoop-2.3.0/etc/hadoop:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/servlet-api-2.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/slf4j-api-1.7.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-configuration-1.6.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/mockito-all-1.8.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-httpclient-3.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jsp-api-2.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jetty-6.1.26.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/httpcore-4.2.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jackson-xc-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/junit-4.8.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jackson-core-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-el-1.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jackson-mapper-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-digester-1.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-lang-2.6.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/httpclient-4.2.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/zookeeper-3.4.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/hadoop-auth-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/asm-3.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/log4j-1.2.17.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/xmlenc-0.52.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-net-3.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jsr305-1.3.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/guava-11.0.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jasper-compiler-5.5.23.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jetty-util-6.1.26.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-collections-3.2.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-codec-1.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jets3t-0.9.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jersey-server-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/paranamer-2.3.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/xz-1.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/hadoop-annotations-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-io-2.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-compress-1.4.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/netty-3.6.2.Final.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-cli-1.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jasper-runtime-5.5.23.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/avro-1.7.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-math3-3.1.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/java-xmlbuilder-0.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jersey-json-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jersey-core-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/activation-1.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/stax-api-1.0-2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jettison-1.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/commons-logging-1.1.3.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jackson-jaxrs-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/lib/jsch-0.1.42.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/hadoop-common-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/hadoop-nfs-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/common/hadoop-common-2.3.0-tests.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jsp-api-2.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jackson-core-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/commons-el-1.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jackson-mapper-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/commons-lang-2.6.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/asm-3.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jsr305-1.3.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/guava-11.0.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/commons-io-2.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jasper-runtime-5.5.23.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/lib/commons-logging-1.1.3.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/hadoop-hdfs-2.3.0-tests.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/hadoop-hdfs-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/hdfs/hadoop-hdfs-nfs-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/servlet-api-2.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/commons-httpclient-3.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jetty-6.1.26.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/aopalliance-1.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jackson-xc-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jaxb-impl-2.2.3-1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jackson-core-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jackson-mapper-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/commons-lang-2.6.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/zookeeper-3.4.5.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jline-0.9.94.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/guice-3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/asm-3.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/log4j-1.2.17.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jsr305-1.3.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/guava-11.0.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jaxb-api-2.2.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jetty-util-6.1.26.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/commons-codec-1.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jersey-client-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/javax.inject-1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jersey-server-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/xz-1.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/commons-io-2.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/commons-cli-1.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jersey-json-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jersey-core-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/activation-1.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/stax-api-1.0-2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jettison-1.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/commons-logging-1.1.3.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/lib/jackson-jaxrs-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-server-tests-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-common-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-client-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-api-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-server-common-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/jackson-core-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.8.8.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/junit-4.10.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/guice-3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/asm-3.2.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/hamcrest-core-1.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/javax.inject-1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/xz-1.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/hadoop-annotations-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/commons-io-2.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.3.0-tests.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.3.0.jar:/home/hadoop/src/hadoop-2.3.0/contrib/capacity-scheduler/*.jar:/home/hadoop/src/hadoop-2.3.0/contrib/capacity-scheduler/*.jar
STARTUP_MSG: build = Unknown -r Unknown; compiled by 'root' on 2014-03-03T02:27Z
STARTUP_MSG: java = 1.7.0_60
************************************************************/
14/08/21 04:51:20 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT]
Formatting using clusterid: CID-9a84257b-77e1-4f79-a5bb-b9564061bc52
14/08/21 04:51:24 INFO namenode.FSNamesystem: fsLock is fair:true
14/08/21 04:51:24 INFO namenode.HostFileManager: read includes:
HostSet(
)
14/08/21 04:51:24 INFO namenode.HostFileManager: read excludes:
HostSet(
)
14/08/21 04:51:24 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000
14/08/21 04:51:24 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true
14/08/21 04:51:24 INFO util.GSet: Computing capacity for map BlocksMap
14/08/21 04:51:24 INFO util.GSet: VM type = 64-bit
14/08/21 04:51:24 INFO util.GSet: 2.0% max memory 966.7 MB = 19.3 MB
14/08/21 04:51:24 INFO util.GSet: capacity = 2^21 = 2097152 entries
14/08/21 04:51:24 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false
14/08/21 04:51:24 INFO blockmanagement.BlockManager: defaultReplication = 3
14/08/21 04:51:24 INFO blockmanagement.BlockManager: maxReplication = 512
14/08/21 04:51:24 INFO blockmanagement.BlockManager: minReplication = 1
14/08/21 04:51:24 INFO blockmanagement.BlockManager: maxReplicationStreams = 2
14/08/21 04:51:24 INFO blockmanagement.BlockManager: shouldCheckForEnoughRacks = false
14/08/21 04:51:24 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000
14/08/21 04:51:24 INFO blockmanagement.BlockManager: encryptDataTransfer = false
14/08/21 04:51:24 INFO blockmanagement.BlockManager: maxNumBlocksToLog = 1000
14/08/21 04:51:25 INFO namenode.FSNamesystem: fsOwner = hadoop (auth:SIMPLE)
14/08/21 04:51:25 INFO namenode.FSNamesystem: supergroup = supergroup
14/08/21 04:51:25 INFO namenode.FSNamesystem: isPermissionEnabled = true
14/08/21 04:51:25 INFO namenode.FSNamesystem: HA Enabled: false
14/08/21 04:51:25 INFO namenode.FSNamesystem: Append Enabled: true
14/08/21 04:51:26 INFO util.GSet: Computing capacity for map INodeMap
14/08/21 04:51:26 INFO util.GSet: VM type = 64-bit
14/08/21 04:51:26 INFO util.GSet: 1.0% max memory 966.7 MB = 9.7 MB
14/08/21 04:51:26 INFO util.GSet: capacity = 2^20 = 1048576 entries
14/08/21 04:51:26 INFO namenode.NameNode: Caching file names occuring more than 10 times
14/08/21 04:51:26 INFO util.GSet: Computing capacity for map cachedBlocks
14/08/21 04:51:26 INFO util.GSet: VM type = 64-bit
14/08/21 04:51:26 INFO util.GSet: 0.25% max memory 966.7 MB = 2.4 MB
14/08/21 04:51:26 INFO util.GSet: capacity = 2^18 = 262144 entries
14/08/21 04:51:26 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.9990000128746033
14/08/21 04:51:26 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0
14/08/21 04:51:26 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension = 30000
14/08/21 04:51:26 INFO namenode.FSNamesystem: Retry cache on namenode is enabled
14/08/21 04:51:26 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis
14/08/21 04:51:26 INFO util.GSet: Computing capacity for map Namenode Retry Cache
14/08/21 04:51:26 INFO util.GSet: VM type = 64-bit
14/08/21 04:51:26 INFO util.GSet: 0.029999999329447746% max memory 966.7 MB = 297.0 KB
14/08/21 04:51:26 INFO util.GSet: capacity = 2^15 = 32768 entries
14/08/21 04:51:27 INFO common.Storage: Storage directory /data/hadoop/name has been successfully formatted.
14/08/21 04:51:27 INFO namenode.FSImage: Saving image file /data/hadoop/name/current/fsimage.ckpt_0000000000000000000 using no compression
14/08/21 04:51:27 INFO namenode.FSImage: Image file /data/hadoop/name/current/fsimage.ckpt_0000000000000000000 of size 218 bytes saved in 0 seconds.
14/08/21 04:51:27 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0
14/08/21 04:51:27 INFO util.ExitUtil: Exiting with status 0
14/08/21 04:51:27 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at name01/192.168.52.128
************************************************************/
注意：上面只要出现“successfully formatted”就表示成功了，只在第一次启动的时候格式化，不要每次启动都格式化。理解为我们新买了块移动硬盘，使用之前总要格式化硬盘。如果真的有必要再次格式化，请先把“$HADOOP_HOME/tmp”目录下的文件全部删除。
读者可以自己观察目录”$HADOOP_HOME/tmp”在格式化前后的变化情况。格式化操作很少有出现失败的情况。如果真出现了，请检查配置是否正确。