国内第一篇详细讲解hadoop2的automatic HA+Federation+Yarn的教

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 07, 2016 pm 03:08 PM

国内讲解详细

前言 hadoop是分布式系统，运行在linux之上，配置起来相对复杂。对于hadoop1，很多同学就因为不能搭建正确的运行环境，导致学习兴趣锐减。不过，我有免费的学习视频下载，请点击这里。 hadoop2出来后，解决了hadoop1的几个固有缺陷，比如单点故障、资源利用

前言

hadoop是分布式系统，运行在linux之上，配置起来相对复杂。对于hadoop1，很多同学就因为不能搭建正确的运行环境，导致学习兴趣锐减。不过，我有免费的学习视频下载，请点击这里。

hadoop2出来后，解决了hadoop1的几个固有缺陷，比如单点故障、资源利用率低、支持作业类型少等问题，结构发生了很大变化，是hadoop未来使用的一个趋势。当然，配置也更加复杂，网上也没有一篇详细的教程来知道大家可以轻轻松松搭建起这个环境的。本文绝对是国内互联网第一篇详细讲述这些配置的文章。

hadoop2体系结构

要想理解本节内容，首先需要了解hadoop1的体系结构。在本博客中和我的视频中都有相关内容，这里不再重复，只讲hadoop2的内容。

hadoop1的核心组成是两部分，即HDFS和MapReduce。在hadoop2中变为HDFS和Yarn。

新的HDFS中的NameNode不再是只有一个了，可以有多个（目前只支持2个）。每一个都有相同的职能。

这两个NameNode的地位如何哪？答：一个是active状态的，一个是standby状态的。当集群运行时，只有active状态的NameNode是正常工作的，standby状态的NameNode是处于待命状态的，时刻同步active状态NameNode的数据。一旦active状态的NameNode不能工作，通过手工或者自动切换，standby状态的NameNode就可以转变为active状态的，就可以继续工作了。这就是高可靠。

当NameNode发生故障时，他们的数据如何保持一致哪？在这里，2个NameNode的数据其实是实时共享的。新HDFS采用了一种共享机制，JournalNode集群或者NFS进行共享。NFS是操作系统层面的，JournalNode是hadoop层面的，我们这里使用JournalNode集群进行数据共享。

如何实现NameNode的自动切换哪？这就需要使用ZooKeeper集群进行选择了。HDFS集群中的两个NameNode都在ZooKeeper中注册，当active状态的NameNode出故障时，ZooKeeper能检测到这种情况，它就会自动把standby状态的NameNode切换为active状态。

HDFS Federation（HDFS联盟）是怎么回事？答：联盟的出现是有原因的。我们知道NameNode是核心节点，维护着整个HDFS中的元数据信息，那么其容量是有限的，受制于服务器的内存空间。当NameNode服务器的内存装不下数据后，那么HDFS集群就装不下数据了，寿命也就到头了。因此其扩展性是受限的。HDFS联盟指的是有多个HDFS集群同时工作，那么其容量理论上就不受限了，夸张点说就是无限扩展。

配置过程详述

大家从官网下载的apache hadoop2.2.0的代码是32位操作系统下编译的，不能使用64位的jdk。我下面部署的hadoop代码是自己的64位机器上重新编译过的。服务器都是64位的，本配置尽量模拟真实环境。大家可以以32位的操作系统做练习，这是没关系的。关于基本环境的详细配置，大家可以观看我的视频，或者浏览吴超沉思录

在这里我们选用4台机器进行示范，各台机器的职责如下表格所示

	hadoop101	hadoop102	hadoop103	hadoop104
是NameNode吗?	是，属集群c1	是，属集群c1	是，属集群c2	是，属集群c2
是DataNode吗？	是	是	是	是
是JournalNode吗？	是	是	是	不是
是ZooKeeper吗？	是	是	是	不是
是ZKFC吗?	是	是	是	是

配置文件一共包括6个，分别是hadoop-env.sh、core-site.xml、hdfs-site.xml、mapred-site.xml、yarn-site.xml和slaves。除了hdfs-site.xml文件在不同集群配置不同外，其余文件在四个节点的配置是完全一样的，可以复制。

文件hadoop-env.sh

就是修改这一行内容，修改后的结果如下

export JAVA_HOME=/usr/local/jdk

【这里的JAVA_HOME的值是jdk的安装路径。如果你那里不一样，请修改为自己的地址】

文件core-site.xml

fs.defaultFS
hdfs://cluster1

【这里的值指的是默认的HDFS路径。当有多个HDFS集群同时工作时，用户如果不写集群名称，那么默认使用哪个哪？在这里指定！该值来自于hdfs-site.xml中的配置】

hadoop.tmp.dir
/usr/local/hadoop/tmp

【这里的路径默认是NameNode、DataNode、JournalNode等存放数据的公共目录。用户也可以自己单独指定这三类节点的目录。】

ha.zookeeper.quorum
hadoop101:2181,hadoop102:2181,hadoop103:2181

【这里是ZooKeeper集群的地址和端口。注意，数量一定是奇数，且不少于三个节点】

集群c1的文件hdfs-site.xml

该文件只配置在hadoop101和hadoop102上。

dfs.replication
2

【指定DataNode存储block的副本数量。默认值是3个，我们现在有4个DataNode，该值不大于4即可。】

dfs.nameservices
cluster1,cluster2

【使用federation时，使用了2个HDFS集群。这里抽象出两个NameService实际上就是给这2个HDFS集群起了个别名。名字可以随便起，相互不重复即可】

dfs.ha.namenodes.cluster1
hadoop101,hadoop102

【指定NameService是cluster1时的namenode有哪些，这里的值也是逻辑名称，名字随便起，相互不重复即可】

dfs.namenode.rpc-address.cluster1.hadoop101
hadoop101:9000

【指定hadoop101的RPC地址】

dfs.namenode.http-address.cluster1.hadoop101
hadoop101:50070

【指定hadoop101的http地址】

dfs.namenode.rpc-address.cluster1.hadoop102
hadoop102:9000

【指定hadoop102的RPC地址】

dfs.namenode.http-address.cluster1.hadoop102
hadoop102:50070

【指定hadoop102的http地址】

dfs.namenode.shared.edits.dir
qjournal://hadoop101:8485;hadoop102:8485;hadoop103:8485/cluster1

【指定cluster1的两个NameNode共享edits文件目录时，使用的JournalNode集群信息】

dfs.ha.automatic-failover.enabled.cluster1
true

【指定cluster1是否启动自动故障恢复，即当NameNode出故障时，是否自动切换到另一台NameNode】

dfs.client.failover.proxy.provider.cluster1
org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider

【指定cluster1出故障时，哪个实现类负责执行故障切换】

dfs.ha.namenodes.cluster2
hadoop103,hadoop104

【指定NameService是cluster2时，两个NameNode是谁，这里是逻辑名称，不重复即可。以下配置与cluster1几乎全部相似，不再添加注释】

dfs.namenode.rpc-address.cluster2.hadoop103
hadoop103:9000

dfs.namenode.http-address.cluster2.hadoop103
hadoop103:50070

dfs.namenode.rpc-address.cluster2.hadoop104
hadoop104:9000

dfs.namenode.http-address.cluster2.hadoop104
hadoop104:50070

dfs.ha.automatic-failover.enabled.cluster2
true

dfs.client.failover.proxy.provider.cluster2
org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider

dfs.journalnode.edits.dir
/usr/local/hadoop/tmp/journal

【指定JournalNode集群在对NameNode的目录进行共享时，自己存储数据的磁盘路径】

dfs.ha.fencing.methods
sshfence

【一旦需要NameNode切换，使用ssh方式进行操作】

dfs.ha.fencing.ssh.private-key-files
/root/.ssh/id_rsa

【如果使用ssh进行故障切换，使用ssh通信时用的密钥存储的位置】

集群c2的文件hdfs-site.xml

该文件只配置在hadoop103和hadoop104上。

该文件与c1中的hdfs-site.xml配置内容完全相同，只有注释位置不一样，一定要注意，不要随便改

dfs.replication
2

dfs.nameservices
cluster1,cluster2

dfs.ha.namenodes.cluster1
hadoop101,hadoop102

dfs.namenode.rpc-address.cluster1.hadoop101
hadoop101:9000

dfs.namenode.http-address.cluster1.hadoop101
hadoop101:50070

dfs.namenode.rpc-address.cluster1.hadoop102
hadoop102:9000

dfs.namenode.http-address.cluster1.hadoop102
hadoop102:50070

dfs.ha.automatic-failover.enabled.cluster1
true

dfs.client.failover.proxy.provider.cluster1
org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider

dfs.ha.namenodes.cluster2
hadoop103,hadoop104

dfs.namenode.rpc-address.cluster2.hadoop103
hadoop103:9000

dfs.namenode.http-address.cluster2.hadoop103
hadoop103:50070

dfs.namenode.rpc-address.cluster2.hadoop104
hadoop104:9000

dfs.namenode.http-address.cluster2.hadoop104
hadoop104:50070

dfs.namenode.shared.edits.dir
qjournal://hadoop101:8485;hadoop102:8485;hadoop103:8485/cluster2

dfs.ha.automatic-failover.enabled.cluster2
true

dfs.client.failover.proxy.provider.cluster2
org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider

dfs.journalnode.edits.dir
/usr/local/hadoop/tmp/journal

dfs.ha.fencing.methods
sshfence

dfs.ha.fencing.ssh.private-key-files
/root/.ssh/id_rsa

文件mapred-site.xml

mapreduce.framework.name
yarn

【指定运行mapreduce的环境是yarn，与hadoop1截然不同的地方】

文件yarn-site.xml

yarn.resourcemanager.hostname
hadoop101

【自定ResourceManager的地址，还是单点，这是隐患】

yarn.nodemanager.aux-services
mapreduce_shuffle

文件slaves

hadoop101
hadoop102
hadoop103
hadoop104

【指定所有的DataNode节点列表，每行一个节点名称】

注意：以上配置中c1中的hdfs-site.xml文件配置在hadoop101和hadoop102中，c2中的hdfs-site.xml文件配置在hadoop103和hadoop104中。其余文件在各个节点都相同。

启动过程

启动时，要非常小心，请严格按照我这里描述的步骤做，每一步要检查自己的操作是否正确。

1.首先检查各个节点的配置文件是否正确

特别要注意hdfs-site.xml文件，在c1和c2中是不同的。

2.启动ZooKeeper集群

关于ZooKeeper的集群配置和启动描述见吴超沉思录，这里不再详述。

在hadoop101、hadoop102、hadoop103上分别执行命令：zkServer.sh start

命令输出(以hadoop101为例)：

[root@hadoop101 hadoop]# zkServer.sh status
JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Mode: follower

三个节点都执行完启动命令后，在hadoop101执行以下验证。

验证：

[root@hadoop101 hadoop]# zkCli.sh
Connecting to localhost:2181
2014-02-12 07:20:35,509 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT
2014-02-12 07:20:35,523 [myid:] - INFO [main:Environment@100] - Client environment:host.name=hadoop101
2014-02-12 07:20:35,524 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.7.0_45
2014-02-12 07:20:35,525 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2014-02-12 07:20:35,525 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/local/jdk/jre
2014-02-12 07:20:35,526 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/local/zookeeper/bin/../build/classes:/usr/local/zookeeper/bin/../build/lib/*.jar:/usr/local/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/local/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/usr/local/zookeeper/bin/../lib/netty-3.2.2.Final.jar:/usr/local/zookeeper/bin/../lib/log4j-1.2.15.jar:/usr/local/zookeeper/bin/../lib/jline-0.9.94.jar:/usr/local/zookeeper/bin/../zookeeper-3.4.5.jar:/usr/local/zookeeper/bin/../src/java/lib/*.jar:/usr/local/zookeeper/bin/../conf:/usr/local/hadoop
2014-02-12 07:20:35,526 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2014-02-12 07:20:35,527 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2014-02-12 07:20:35,528 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=
2014-02-12 07:20:35,528 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2014-02-12 07:20:35,529 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2014-02-12 07:20:35,529 [myid:] - INFO [main:Environment@100] - Client environment:os.version=2.6.32-431.el6.x86_64
2014-02-12 07:20:35,530 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
2014-02-12 07:20:35,530 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
2014-02-12 07:20:35,531 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/usr/local/hadoop
2014-02-12 07:20:35,533 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@10636a7e
Welcome to ZooKeeper!
2014-02-12 07:20:35,569 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@966] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2014-02-12 07:20:35,587 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@849] - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
JLine support is enabled
2014-02-12 07:20:35,687 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1207] - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x654423404e530000, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1]

【可以看到ZK集群中只有一个节点zookeeper】

3.格式化ZooKeeper集群，目的是在ZooKeeper集群上建立HA的相应节点。

在hadoop101上执行命令：/usr/local/hadoop/bin/hdfs zkfc –formatZK

命令输出：

[root@hadoop101 hadoop]# /usr/local/hadoop/bin/hdfs zkfc -formatZK
14/02/12 07:28:56 INFO tools.DFSZKFailoverController: Failover controller configured for NameNode NameNode at hadoop101/192.168.80.101:9000
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:host.name=hadoop101
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:java.version=1.7.0_45
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Oracle Corporation
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:java.home=/usr/local/jdk/jre
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/usr/local/hadoop/etc/hadoop:/usr/local/hadoop/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jsch-0.1.42.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-digester-1.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jets3t-0.6.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-api-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-lang-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-xc-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/common/lib/activation-1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-httpclient-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-configuration-1.6.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop/share/hadoop/common/lib/zookeeper-3.4.5.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/common/lib/stax-api-1.0.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-collections-3.2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/junit-4.8.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/common/lib/mockito-all-1.8.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-logging-1.1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-math-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-json-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-net-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-compiler-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/common/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/common/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/common/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-jaxrs-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/jettison-1.1.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/hadoop-nfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/hdfs:/usr/local/hadoop/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-lang-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-logging-1.1.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-nfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/hamcrest-core-1.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/yarn/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/yarn/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/junit-4.10.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/yarn/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-api-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-tests-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-site-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-client-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hamcrest-core-1.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/junit-4.10.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.2.0.jar:/usr/local/hadoop/contrib/capacity-scheduler/*.jar
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/usr/local/hadoop/lib/native
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:java.compiler=
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:os.version=2.6.32-431.el6.x86_64
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:user.name=root
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:user.home=/root
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Client environment:user.dir=/usr/local/hadoop
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=hadoop101:2181,hadoop102:2181,hadoop103:2181 sessionTimeout=5000 watcher=org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef@3e9c00ea
14/02/12 07:28:57 INFO zookeeper.ClientCnxn: Opening socket connection to server hadoop102/192.168.80.102:2181. Will not attempt to authenticate using SASL (unknown error)
14/02/12 07:28:57 INFO zookeeper.ClientCnxn: Socket connection established to hadoop102/192.168.80.102:2181, initiating session
14/02/12 07:28:57 INFO zookeeper.ClientCnxn: Session establishment complete on server hadoop102/192.168.80.102:2181, sessionid = 0x6644234039710000, negotiated timeout = 5000
14/02/12 07:28:57 INFO ha.ActiveStandbyElector: Session connected.
14/02/12 07:28:57 INFO ha.ActiveStandbyElector: Successfully created /hadoop-ha/cluster1 in ZK.
14/02/12 07:28:57 INFO zookeeper.ZooKeeper: Session: 0x6644234039710000 closed
14/02/12 07:28:57 INFO zookeeper.ClientCnxn: EventThread shut down
[root@hadoop101 hadoop]#

验证：

[root@hadoop101 hadoop]# zkCli.sh
Connecting to localhost:2181
2014-02-12 07:30:24,355 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT
2014-02-12 07:30:24,373 [myid:] - INFO [main:Environment@100] - Client environment:host.name=hadoop101
2014-02-12 07:30:24,374 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.7.0_45
2014-02-12 07:30:24,375 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2014-02-12 07:30:24,376 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/local/jdk/jre
2014-02-12 07:30:24,376 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/local/zookeeper/bin/../build/classes:/usr/local/zookeeper/bin/../build/lib/*.jar:/usr/local/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/local/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/usr/local/zookeeper/bin/../lib/netty-3.2.2.Final.jar:/usr/local/zookeeper/bin/../lib/log4j-1.2.15.jar:/usr/local/zookeeper/bin/../lib/jline-0.9.94.jar:/usr/local/zookeeper/bin/../zookeeper-3.4.5.jar:/usr/local/zookeeper/bin/../src/java/lib/*.jar:/usr/local/zookeeper/bin/../conf:/usr/local/hadoop
2014-02-12 07:30:24,378 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2014-02-12 07:30:24,379 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2014-02-12 07:30:24,380 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=
2014-02-12 07:30:24,381 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2014-02-12 07:30:24,382 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2014-02-12 07:30:24,382 [myid:] - INFO [main:Environment@100] - Client environment:os.version=2.6.32-431.el6.x86_64
2014-02-12 07:30:24,383 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
2014-02-12 07:30:24,383 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
2014-02-12 07:30:24,384 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/usr/local/hadoop
2014-02-12 07:30:24,387 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@10636a7e
Welcome to ZooKeeper!
2014-02-12 07:30:24,422 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@966] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2014-02-12 07:30:24,462 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@849] - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
JLine support is enabled
2014-02-12 07:30:24,494 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1207] - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x654423404e530001, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] ls /
[hadoop-ha, zookeeper]
[zk: localhost:2181(CONNECTED) 1] ls /hadoop-ha
[cluster1]
[zk: localhost:2181(CONNECTED) 2]

【格式化操作的目的是在ZK集群中建立一个节点，用于保存集群c1中NameNode的状态数据】

在hadoop103上执行命令：/usr/local/hadoop/bin/hdfs zkfc –formatZK

命令输出：

[root@hadoop103 hadoop]# /usr/local/hadoop/bin/hdfs zkfc -formatZK
14/02/12 07:32:14 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
14/02/12 07:32:14 INFO tools.DFSZKFailoverController: Failover controller configured for NameNode NameNode at hadoop103/192.168.80.103:9000
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:host.name=hadoop103
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:java.version=1.7.0_45
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Oracle Corporation
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:java.home=/usr/local/jdk/jre
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/usr/local/hadoop/etc/hadoop:/usr/local/hadoop/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jsch-0.1.42.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-digester-1.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jets3t-0.6.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-api-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-lang-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-xc-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/common/lib/activation-1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-httpclient-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-configuration-1.6.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop/share/hadoop/common/lib/zookeeper-3.4.5.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/common/lib/stax-api-1.0.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-collections-3.2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/junit-4.8.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/common/lib/mockito-all-1.8.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-logging-1.1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-math-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-json-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-net-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-compiler-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/common/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/common/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/common/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-jaxrs-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/jettison-1.1.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/hadoop-nfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/hdfs:/usr/local/hadoop/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-lang-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-logging-1.1.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-nfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/hamcrest-core-1.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/yarn/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/yarn/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/junit-4.10.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/yarn/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-api-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-tests-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-site-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-client-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hamcrest-core-1.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/junit-4.10.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.2.0.jar:/usr/local/hadoop/contrib/capacity-scheduler/*.jar
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:java.compiler=
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:os.version=2.6.32-431.el6.x86_64
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:user.name=root
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:user.home=/root
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Client environment:user.dir=/usr/local/hadoop
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=hadoop101:2181,hadoop102:2181,hadoop103:2181 sessionTimeout=5000 watcher=org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef@91d3b18
14/02/12 07:32:14 INFO zookeeper.ClientCnxn: Opening socket connection to server hadoop102/192.168.80.102:2181. Will not attempt to authenticate using SASL (unknown error)
14/02/12 07:32:14 INFO zookeeper.ClientCnxn: Socket connection established to hadoop102/192.168.80.102:2181, initiating session
14/02/12 07:32:14 INFO zookeeper.ClientCnxn: Session establishment complete on server hadoop102/192.168.80.102:2181, sessionid = 0x6644234039710001, negotiated timeout = 5000
14/02/12 07:32:14 INFO ha.ActiveStandbyElector: Session connected.
14/02/12 07:32:14 INFO ha.ActiveStandbyElector: Successfully created /hadoop-ha/cluster2 in ZK.
14/02/12 07:32:14 INFO zookeeper.ZooKeeper: Session: 0x6644234039710001 closed
14/02/12 07:32:14 INFO zookeeper.ClientCnxn: EventThread shut down

验证：

[root@hadoop103 hadoop]# zkCli.sh
Connecting to localhost:2181
2014-02-12 07:32:21,770 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT
2014-02-12 07:32:21,786 [myid:] - INFO [main:Environment@100] - Client environment:host.name=hadoop103
2014-02-12 07:32:21,788 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.7.0_45
2014-02-12 07:32:21,789 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2014-02-12 07:32:21,789 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/local/jdk/jre
2014-02-12 07:32:21,790 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/local/zookeeper/bin/../build/classes:/usr/local/zookeeper/bin/../build/lib/*.jar:/usr/local/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/local/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/usr/local/zookeeper/bin/../lib/netty-3.2.2.Final.jar:/usr/local/zookeeper/bin/../lib/log4j-1.2.15.jar:/usr/local/zookeeper/bin/../lib/jline-0.9.94.jar:/usr/local/zookeeper/bin/../zookeeper-3.4.5.jar:/usr/local/zookeeper/bin/../src/java/lib/*.jar:/usr/local/zookeeper/bin/../conf:/usr/local/hadoop
2014-02-12 07:32:21,791 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2014-02-12 07:32:21,792 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2014-02-12 07:32:21,793 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=
2014-02-12 07:32:21,793 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2014-02-12 07:32:21,794 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2014-02-12 07:32:21,794 [myid:] - INFO [main:Environment@100] - Client environment:os.version=2.6.32-431.el6.x86_64
2014-02-12 07:32:21,795 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
2014-02-12 07:32:21,796 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
2014-02-12 07:32:21,796 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/usr/local/hadoop
2014-02-12 07:32:21,801 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@10636a7e
Welcome to ZooKeeper!
2014-02-12 07:32:21,850 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@966] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2014-02-12 07:32:21,868 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@849] - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
2014-02-12 07:32:21,906 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1207] - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x6744234039810002, negotiated timeout = 30000

WATCHER::

【集群c2也格式化，产生一个新的ZK节点cluster2】

4.启动JournalNode集群

在hadoop101、hadoop102、hadoop103上分别执行命令：/usr/local/hadoop/sbin/hadoop-daemon.sh start journalnode

命令输出(以hadoop101为例)：

[root@hadoop101 hadoop]# /usr/local/hadoop/sbin/hadoop-daemon.sh start journalnode
starting journalnode, logging to /usr/local/hadoop/logs/hadoop-root-journalnode-hadoop101.out
[root@hadoop101 hadoop]#

在每个节点执行完启动命令后，每个节点都执行以下验证。

验证(以hadoop101为例)：

[root@hadoop101 hadoop]# jps
23396 JournalNode
23598 Jps
22491 QuorumPeerMain
[root@hadoop101 hadoop]#

【产生一个java进程JournalNode】

查看一下目录结构

[root@hadoop101 hadoop]# jps
23396 JournalNode
22491 QuorumPeerMain
23445 Jps

[root@hadoop101 hadoop]# pwd
/usr/local/hadoop
[root@hadoop101 hadoop]# ls tmp/
journal
[root@hadoop101 hadoop]#

【启动JournalNode后，会在本地磁盘产生一个目录，用户保存NameNode的edits文件的数据】

5.格式化集群c1的一个NameNode

从hadoop101和hadoop102中任选一个即可，这里选择的是hadoop101

在hadoop101执行以下命令：/usr/local/hadoop/bin/hdfs namenode -format -clusterId c1

命令输出：

[root@hadoop101 hadoop]# /usr/local/hadoop/bin/hdfs namenode -format -clusterId c1
14/02/12 08:07:59 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = hadoop101/192.168.80.101
STARTUP_MSG:   args = [-format, -clusterId, c1]
STARTUP_MSG:   version = 2.2.0
STARTUP_MSG:   classpath = /usr/local/hadoop/etc/hadoop:/usr/local/hadoop/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jsch-0.1.42.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-digester-1.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jets3t-0.6.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-api-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-lang-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-xc-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/common/lib/activation-1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-httpclient-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-configuration-1.6.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop/share/hadoop/common/lib/zookeeper-3.4.5.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/common/lib/stax-api-1.0.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-collections-3.2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/junit-4.8.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/common/lib/mockito-all-1.8.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-logging-1.1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-math-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-json-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-net-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-compiler-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/common/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/common/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/common/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-jaxrs-1.8.8.jar:/usr/local/hadoop/share/hadoop/common/lib/jettison-1.1.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/common/hadoop-nfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/hdfs:/usr/local/hadoop/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-lang-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-logging-1.1.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-nfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/hamcrest-core-1.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/yarn/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/yarn/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/junit-4.10.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/yarn/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-api-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-tests-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-site-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-client-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-common-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hamcrest-core-1.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-io-2.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/junit-4.10.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0-tests.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.2.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.2.0.jar:/contrib/capacity-scheduler/*.jar
STARTUP_MSG:   build = Unknown -r Unknown; compiled by 'root' on 2013-12-26T08:50Z
STARTUP_MSG:   java = 1.7.0_45
******************************************************

声明

本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn

哪些国内正规的BTC比特币交易平台app会比较好？国内十大BTC比特币交易软件推荐分享！Feb 06, 2024 pm 03:30 PM

国内BTC比特币交易平台app推荐比特币是目前最热门的数字货币之一，在中国的市场上也不例外。很多人都喜欢通过BTC比特币交易平台app进行交易。然而，在众多的BTC比特币交易平台中，哪些是正规的，安全可靠的呢？下面是推荐的国内十大BTC比特币交易软件：BinanceBinance是全球领先的加密货币交易平台之一，以其出色的安全功能和便利性而著称。此平台提供多个加密货币交易对，为用户提供了丰富的交易选择。Huobi火币是全球知名的加密货币交易平台，特别在中国备受欢迎。它提供交易所和OTC交易等多种

目前国内可用usdt交易平台有哪些？Feb 10, 2024 pm 09:10 PM

国内可用的USDT交易平台USDT（Tether）是一种稳定币，其价值锚定在美元上，这使得它在数字货币市场上非常受欢迎。在国内，由于政策的限制，只有少数几个交易平台允许用户进行USDT的交易。下面是目前国内可用的USDT交易平台的一些介绍。1.币安（Binance）币安是全球最大的加密货币交易平台之一，也是国内用户熟悉和依赖的交易所之一。用户可以在币安进行多种数字货币的交易，包括使用USDT进行其他数字货币的交易，并在平台内进行USDT的充提操作。币安提供了丰富的交易工具和功能，为用户提供多样化

韩国比特币和国内比特币有什么不同吗？Mar 05, 2025 pm 06:51 PM

比特币投资热潮持续升温，比特币作为全球首个去中心化数字资产，其去中心化和全球流通性等特性备受关注。尽管中国曾是比特币最大市场，但政策影响导致交易受限。而如今，韩国成为全球主要比特币市场之一，引发投资者对其与国内比特币差异的疑问。本文将深入分析两国比特币市场的区别。韩、中比特币市场差异解析韩国与中国比特币市场的主要区别体现在价格、市场供需、汇率、法规监管、市场流动性和交易平台等方面：价格差异：韩国比特币价格通常高于中国，这种现象被称为“泡菜溢价”。例如，2024年10月下旬，韩国比特币价格一度

国内怎样参与NFT交易Jan 30, 2024 pm 12:15 PM

NFT（非同质化代币）是加密货币领域的新趋势，最近备受关注。这种基于区块链技术的数字资产具有独一无二且不可互换的特点，可以代表数字作品的所有权。随着NFT市场的兴起，越来越多的人开始关注并参与其中。本文将简要介绍国内参与NFT交易的方式。了解NFT的基本概念在参与NFT交易之前，了解NFT的基本概念是必要的。NFT是一种基于区块链技术的数字资产，与加密货币不同，NFT是独一无二的，不可互换的。它可以代表数字作品的版权、稀有性和所有权，如艺术品、音乐、视频、收藏品等。了解这些基本概念将有助于更好地

国内能用的矿池有哪些？国内能用的矿池一览Mar 03, 2025 pm 08:12 PM

矿池挖矿已成为加密货币挖矿的重要方式，本文将介绍目前国内可用的矿池。面对日益激烈的挖矿竞争，选择合适的矿池至关重要。国内主流矿池推荐：以下列举部分国内可用的矿池，它们各有特点，矿工可根据自身需求选择：BinancePool:Binance交易所旗下的矿池，支持多种加密货币，并提供方便易用的API接口。EMCD(ECOS):一家信誉良好的云挖矿服务商，拥有合法地位，提供多种挖矿服务，包括云挖矿和矿机租赁等。用户众多，全球影响力大。F2pool:老牌比特币矿池，支持多种

目前国内可用的狗狗币交易平台有哪些？Feb 11, 2024 am 08:00 AM

目前国内可用的狗狗币交易平台有哪些？虚拟货币市场热度不减，而狗狗币作为一种备受关注的加密货币，自其诞生以来，逐渐成为投资者的新宠。随着狗狗币的价值和知名度不断提升，越来越多的人开始关注和参与狗狗币交易。在国内，有许多狗狗币交易平台可供选择，本文将深入分析目前国内可用的狗狗币交易平台有哪些。币安作为全球领先的数字货币交易平台之一，币安提供了丰富的交易对和多样的交易功能。狗狗币也是币安支持的数字货币之一，用户可以通过币安平台便捷地进行狗狗币的买卖交易。币安拥有庞大的用户群体和高流动性，为用户提供了极

cookies的详细使用说明Feb 22, 2024 pm 12:21 PM

cookies是一种常见的网络技术，用于存储用户在网站上的个人偏好和行为信息。在今天的数字化时代，几乎所有的网站都使用cookies来提供个性化和更好的用户体验。本文将详细介绍cookies的使用说明，帮助用户更好地理解和掌握这一技术。首先，我们来了解一下cookies的基本概念。Cookies是网站在用户浏览器上存储的小型文本文件，包含有关用户访问网站的一

国内最佳pip源排行榜：选择哪一个合适？Jan 16, 2024 am 09:28 AM

国内pip源排行榜：哪个值得选择？简介：在Python开发中，pip是最常用的包管理工具之一。然而，由于国内网络环境的复杂性，使用默认的pip源下载速度可能会很慢甚至失败。为了解决这个问题，国内各大互联网公司和开发者纷纷搭建了自己的pip源，提供更快速、稳定的下载服务。本文将介绍几个热门的国内pip源，并给出具体的代码示例，帮助你选择最适合的pip源。清华大

See all articles