我们通过cloudera manager使用
cloudera manager>>hdfs>>操作>启用高可用性>>选定的备用名称节点和日志节点，然后是名称服务1
一旦整个过程完成，然后部署客户端配置。
通过列出hdfs目录（hadoopfs-ls/），然后手动故障转移到备用namenode&再次列出hdfs目录（hadoopfs-ls/），从客户机进行测试。这个测试非常有效。
但当我使用以下命令运行hadoop sleep作业时，它失败了

$ hadoop jar /opt/cloudera/parcels/CDH-4.6.0-1.cdh4.6.0.p0.26/lib/hadoop-0.20-mapreduce/hadoop-examples.jar sleep -m 1 -r 0
java.lang.IllegalArgumentException: java.net.UnknownHostException: nameservice1
at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:414)
at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:164)
at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:129)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:448)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:410)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:128)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2308)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:87)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2342)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2324)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:351)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:194)
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:103)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:980)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:974)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:416)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1438)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:974)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:948)
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1410)
at org.apache.hadoop.examples.SleepJob.run(SleepJob.java:174)
at org.apache.hadoop.examples.SleepJob.run(SleepJob.java:237)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.examples.SleepJob.main(SleepJob.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:144)
at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.apache.hadoop.util.RunJar.main(RunJar.java:208)
Caused by: java.net.UnknownHostException: nameservice1
... 37 more

我不知道为什么它不能解析nameservice1，即使在部署客户端配置之后。
当我搜索这个问题时，我只找到了一个解决这个问题的方法
在配置条目中添加以下条目以修复问题dfs.nameservices=nameservice1 dfs.ha.namenodes.nameservice1=namenode1，namenode2 dfs.namenode.rpc address.nameservice1.namenode1=ip-10-118-137-215.ec2。internal:8020 dfs.namenode.rpc-address.nameservice1.namenode2=ip-10-12-122-210.ec2.internal：8020 dfs.client.failover.proxy.provider.nameservice1=org.apache.hadoop.hdfs.server.namenode.ha.configuredfailoverproxyprovider
我的印象是cloudera经理会处理好的。我检查了这个配置的客户机，配置就在那里（/var/run/cloudera scm agent/process/1998 deploy client config/hadoop conf/hdfs site.xml）。
还有一些配置文件的详细信息：

[11:22:37 root@datasci01.dev:~]# ls -l /etc/hadoop/conf.cloudera.*
/etc/hadoop/conf.cloudera.hdfs:
total 16
-rw-r--r-- 1 root root  943 Jul 31 09:33 core-site.xml
-rw-r--r-- 1 root root 2546 Jul 31 09:33 hadoop-env.sh
-rw-r--r-- 1 root root 1577 Jul 31 09:33 hdfs-site.xml
-rw-r--r-- 1 root root  314 Jul 31 09:33 log4j.properties

/etc/hadoop/conf.cloudera.hdfs1:
total 20
-rwxr-xr-x 1 root root  233 Sep  5  2013 container-executor.cfg
-rw-r--r-- 1 root root 1890 May 21 15:48 core-site.xml
-rw-r--r-- 1 root root 2546 May 21 15:48 hadoop-env.sh
-rw-r--r-- 1 root root 1577 May 21 15:48 hdfs-site.xml
-rw-r--r-- 1 root root  314 May 21 15:48 log4j.properties

/etc/hadoop/conf.cloudera.mapreduce:
total 20
-rw-r--r-- 1 root root 1032 Jul 31 09:33 core-site.xml
-rw-r--r-- 1 root root 2775 Jul 31 09:33 hadoop-env.sh
-rw-r--r-- 1 root root 1450 Jul 31 09:33 hdfs-site.xml
-rw-r--r-- 1 root root  314 Jul 31 09:33 log4j.properties
-rw-r--r-- 1 root root 2446 Jul 31 09:33 mapred-site.xml

 /etc/hadoop/conf.cloudera.mapreduce1:
total 24
-rwxr-xr-x 1 root root  233 Sep  5  2013 container-executor.cfg
-rw-r--r-- 1 root root 1979 May 16 12:20 core-site.xml
-rw-r--r-- 1 root root 2775 May 16 12:20 hadoop-env.sh
-rw-r--r-- 1 root root 1450 May 16 12:20 hdfs-site.xml
-rw-r--r-- 1 root root  314 May 16 12:20 log4j.properties
-rw-r--r-- 1 root root 2446 May 16 12:20 mapred-site.xml
[11:23:12 root@datasci01.dev:~]#

我对/etc/hadoop/conf.cloudera.hdfs1&/etc/hadoop/conf.cloudera.mapreduce1中的旧配置的问题表示怀疑，但不确定。
看起来/etc/hadoop/conf/*从未更新过

# ls -l /etc/hadoop/conf/

total 24
-rwxr-xr-x 1 root root  233 Sep  5  2013 container-executor.cfg
-rw-r--r-- 1 root root 1979 May 16 12:20 core-site.xml
-rw-r--r-- 1 root root 2775 May 16 12:20 hadoop-env.sh
-rw-r--r-- 1 root root 1450 May 16 12:20 hdfs-site.xml
-rw-r--r-- 1 root root  314 May 16 12:20 log4j.properties
-rw-r--r-- 1 root root 2446 May 16 12:20 mapred-site.xml

有人知道这个问题吗？