hadoop - 运行 hadoop 时出错

Question

haduser@user-laptop:/usr/local/hadoop$ bin/hadoop dfs -copyFromLocal /tmp/input 
/user/haduser/input

11/12/14 14:21:00 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 0 time(s).

11/12/14 14:21:01 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 1 time(s).

11/12/14 14:21:02 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 2 time(s).

11/12/14 14:21:03 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 3 time(s).

11/12/14 14:21:04 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 4 time(s).

11/12/14 14:21:05 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 5 time(s).

11/12/14 14:21:06 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 6 time(s).

11/12/14 14:21:07 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. -Already tried 7 time(s).

11/12/14 14:21:08 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 8 time(s).

11/12/14 14:21:09 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 9 time(s).

Bad connection to FS. command aborted. exception: Call to localhost/127.0.0.1:54310 failed on connection exception: java.net.ConnectException: Connection refused

当我尝试将文件从 /tmp/input 复制到 /user/haduser/input 时出现上述错误，即使文件 /etc/hosts 包含本地主机的条目。jps 命令 运行时，TaskTracker 和namenode 未列出。

可能是什么问题？请有人帮我解决这个问题。

Answer 1

我有类似的问题 - 实际上 Hadoop 绑定(bind)到 IPv6。然后我添加了-“export HADOOP_OPTS=-Djava.net.preferIPv4Stack=true”到$HADOOP_HOME/conf/hadoop-env.sh

即使我在系统上禁用了 IPv6，Hadoop 仍绑定(bind)到 IPv6。一旦我将它添加到 env，就开始正常工作了。

希望这对某人有帮助。