我目前正在学习Hadoop和我试图安装一个单节点测试中http://hadoop.apache.org/common/docs/current/single_node_setup.html“的Hadoop的NameNode -format”返回的java.net.UnknownHostException
我已经将ssh配置定义(我可以登录没有密码)。
我的服务器位于我们的Intranet上,位于代理之后。
当我试图运行
斌/ Hadoop的NameNode的-format
我得到以下的java.net.UnknownHostException异常:
$ bin/hadoop namenode -format
11/06/10 15:36:47 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = java.net.UnknownHostException: srv-clc-04.univ-nantes.prive3: srv-clc-04.univ-nantes.prive3
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 0.20.203.0
STARTUP_MSG: build = http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-203 -r 1099333; compiled by 'oom' on Wed May 4 07:57:50 PDT 2011
************************************************************/
Re-format filesystem in /home/lindenb/tmp/HADOOP/dfs/name ? (Y or N) Y
11/06/10 15:36:50 INFO util.GSet: VM type = 64-bit
11/06/10 15:36:50 INFO util.GSet: 2% max memory = 19.1675 MB
11/06/10 15:36:50 INFO util.GSet: capacity = 2^21 = 2097152 entries
11/06/10 15:36:50 INFO util.GSet: recommended=2097152, actual=2097152
11/06/10 15:36:50 INFO namenode.FSNamesystem: fsOwner=lindenb
11/06/10 15:36:50 INFO namenode.FSNamesystem: supergroup=supergroup
11/06/10 15:36:50 INFO namenode.FSNamesystem: isPermissionEnabled=true
11/06/10 15:36:50 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100
11/06/10 15:36:50 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
11/06/10 15:36:50 INFO namenode.NameNode: Caching file names occuring more than 10 times
11/06/10 15:36:50 INFO common.Storage: Image file of size 113 saved in 0 seconds.
11/06/10 15:36:50 INFO common.Storage: Storage directory /home/lindenb/tmp/HADOOP/dfs/name has been successfully formatted.
11/06/10 15:36:50 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at java.net.UnknownHostException: srv-clc-04.univ-nantes.prive3: srv-clc-04.univ-nantes.prive3
************************************************************/
之后, hadoop开始了
./bin/start-all.sh
但还有一个新的异常,当我试图复制一个本地文件:
bin/hadoop fs -copyFromLocal ~/file.txt file.txt
DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/lindenb/file.txt could only be replicated to 0 nodes, instead of 1
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1417)
我怎么能解决这个问题吗?
感谢
我在CentOS虚拟机的Cloudera发行版上格式化我的NameNode时收到类似的错误。你能告诉我你对/ etc/hosts文件做了什么吗?我目前有以下几行: – 2013-11-19 20:38:27
'127.0.0.1 localhost.localdomain localhost'和':: localhost6.localdomain6 localhost6' – 2013-11-19 20:39:08