Hadoop 应用程序的包装器
是否存在 Hadoop 应用程序的包装器？我指的是一个将 Hadoop 设置转变为独立应用程序的包装器。我知道这会违背 Hadoop 的目的。然而，这将极大地帮助开发 Hadoop 应用程序。
我知道 Hadoop Netbeans 插件允许创建本地应用内 Hadoop 环境。然而，我正在寻找一个应用程序，您可以让它在单个应用程序环境中代理您的 Hadoop 应用程序。
Does there exist a wrapper for Hadoop applications? I'm referring to a wrapper that would turn a Hadoop setup into a standalone application. I understand that this would defeat the purpose of Hadoop. However, this would assist in developing Hadoop applications quite immensely.
I know that the Hadoop Netbeans plugin allows for the creation of a local in-app Hadoop environment. However, I am looking for an application where you can have it proxy your Hadoop application in a single application environment.
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您所需要的只是 CLASSPATH 中的 Hadoop，默认情况下它将以本地模式运行。
All you need is Hadoop in the CLASSPATH and it will run in local mode by default.
apache hadoop wiki 上有一个用于调试 MapReduce 程序的条目。
这可能是您问题的答案
http://wiki.apache.org/hadoop/HowToDebugMapReducePrograms
还有一个 cloudera 的博客，介绍如何运行 hadoop 作为单元测试
http://www.cloudera.com/blog/2008/12/testing- hadoop/
因此，您也许可以配置环境来执行 MapReduce 程序作为单元测试，看看发生了什么
on the apache hadoop wiki is an entry for debugging map reduce programs.
That might be an answer to you question
http://wiki.apache.org/hadoop/HowToDebugMapReducePrograms
There is also a blog by cloudera on how to run hadoop as a unit test
http://www.cloudera.com/blog/2008/12/testing-hadoop/
So you might be able to configure your environment to execute your map reduce program as a unit test to see what's going on
从 tar.gz 文件在单个节点上安装 hadoop 默认情况下会在本地主机上运行所有内容。格式化 hdfs (hadoop namenode -format) 和 start-all.sh 应该可以做到。
Installing hadoop from the tar.gz file on a single node defaults to running everything on localhost. Format the hdfs (hadoop namenode -format) and start-all.sh should do it.