Question

我面临着fabric2命令模块的奇怪行为。这些命令就像一个魅力：

connect = Connection(host=h, user=u ,connect_kwargs={"password":p})
connect.run('mkdir temp_streaming')
connect.put(m, "temp_streaming/mapper.py")
connect.put(r, "temp_streaming/reducer.py")

但是当涉及到这个时：

input_path = input("Please choose the input of your program (on your HDFS File System) ")
output_path = input("Please choose a name for your output folder ")

main_command = str('yarn jar '+ jar_path+' -files mapper.py,reducer.py -mapper temp_streaming/mapper.py -reducer temp_streaming/reducer.py -input '+ input_path + ' -output '+ output_path)

connect.run(main_command)

我得到这个错误，我无法弄清楚：

bash: yarn: command not found
Traceback (most recent call last):
  File "__main.py__", line 77, in <module>
    main()
  File "__main.py__", line 65, in main
   RunMapReduce(mapper, reducer, jar_path)
  File "__main.py__", line 46, in RunMapReduce
   connect.run(main_command)
 File "<decorator-gen-3>", line 2, in run
 File "/usr/local/lib/python3.5/dist-packages/fabric2/connection.py", line 30, in opens
return method(self, *args, **kwargs)
 File "/usr/local/lib/python3.5/dist-packages/fabric2/connection.py", line 586, in run
return self._run(runner, command, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/invoke/context.py", line 100, in _run
return runner.run(command, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/invoke/runners.py", line 268, in run
return self._run_body(command, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/invoke/runners.py", line 401, in _run_body
raise UnexpectedExit(result)
invoke.exceptions.UnexpectedExit: Encountered a bad command exit code!

Command: 'yarn jar /home/hadoop/hadoop/share/hadoop/tools/lib/hadoop-streaming-2.8.4.jar -files mapper.py,reducer.py -mapper temp_streaming/mapper.py -reducer temp_streaming/reducer.py -input /books/kafka_metamorphosis.txt -output /test'

Exit code: 127

Stdout: already printed

Stderr: already printed

当我使用ssh直接登录服务器并运行它时，即使此bash命令正常工作，它就像远程服务器不知道 yarn 命令一样。在我看来，它与这个库有关，但我无法用文档解决我的问题。

Answer 1

我也遇到了这个问题：结果是Fabric运行的SSH是非交互式shell 。包含$PATH bin路径的yarn变量在/etc/profile或~/.bash_profile或~/.bashrc中设置，其中没有一个来源。

Here is the link，以及一些解决方案。

就个人而言，我不喜欢玩那些文件=＆gt;我刚刚做了什么（在绊倒这个链接之前）是我使用二进制文件的完整路径：/usr/bin/yarn [the rest of your command]

退出代码：127执行远程ssh命令时使用fabric2

1 个答案: