我想在伪分布式模式下设置一个hadoop-cluster.我设法执行所有设置步骤,包括在我的机器上启动Namenode,Datanode,Jobtracker和Tasktracker.
然后我尝试运行一些示例程序并面对java.net.ConnectException: Connection refused错误.我回到了以独立模式运行某些操作的最初步骤,并遇到了同样的问题.
我甚至对所有安装步骤进行了三重检查,并且不知道如何修复它.(我是Hadoop和初学Ubuntu用户的新手,因此,如果提供任何指南或提示,我恳请您"考虑到它").
这是我一直收到的错误输出:
hduser@marta-komputer:/usr/local/hadoop$ bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar grep input output 'dfs[a-z.]+'
15/02/22 18:23:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
15/02/22 18:23:04 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
java.net.ConnectException: Call From marta-komputer/127.0.1.1 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:731)
at …