eclipse hadoop 2 中的 hadoop jar 文件在哪里？
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Where are hadoop jar files in hadoop 2?
提问by Shekhar
I am trying to implement one sample word count program using Hadoop. I have downloaded and installed Hadoop 2.0.0. I want to do this sample program using Eclipse because i think later in my real project I have to use Eclipse only.
我正在尝试使用 Hadoop 实现一个示例字数统计程序。我已经下载并安装了Hadoop 2.0.0。我想使用 Eclipse 来做这个示例程序，因为我认为在我的实际项目中我必须只使用 Eclipse。
I am not able to find Hadoop related jar files like hadoop-core.jarand other required jar files. I searched in all the folders of 2.0 hadoop but couldn't find those files. Those same files are available in 1.0 version of Hadoop but not in 2.0 version. I would like to know where can I get these files?
我无法找到与 Hadoop 相关的 jar 文件hadoop-core.jar和其他所需的 jar 文件。我搜索了 2.0 hadoop 的所有文件夹，但找不到这些文件。这些相同的文件在 Hadoop 1.0 版本中可用，但在 2.0 版本中不可用。我想知道在哪里可以得到这些文件？
I am not able to find much information about 2.0 version.
我找不到关于 2.0 版本的很多信息。
please help
请帮忙
回答by aa8y
Actually, I faced a similar issue in the beginning. Apparently, there is no hadoop-core.jarfor version 2. You'll have to download the Hadoop Commonand MapReduce Client Corejars and use them both. I am sure it'll solve your problems. Hope this helps!
实际上，我一开始也面临类似的问题。显然，hadoop-core.jar版本 2没有。您必须下载 Hadoop Common和MapReduce Client Corejar 并同时使用它们。我相信它会解决你的问题。希望这可以帮助！
Edit:I just updated the links such that people can choose the appropriate version from the repository since we now come way past the initial version 2.
编辑：我刚刚更新了链接，以便人们可以从存储库中选择适当的版本，因为我们现在已经超过了初始版本 2。
回答by Anonymous
Including JARs in folders listed below worked for me:
在下面列出的文件夹中包含 JAR 对我有用：
share\hadoop\common
share\hadoop\common\lib
share\hadoop\mapreduce
share\hadoop\mapreduce\lib
share\hadoop\yarn
share\hadoop\yarn\lib
回答by Chong Tang
hadoop-core-${HADOOP_VERSION}.jar is in
hadoop-core-${HADOOP_VERSION}.jar 在
${HADOOP_HOME}/share/hadoop/common
directory, not ${HADOOP_HOME} directory.
目录，而不是 ${HADOOP_HOME} 目录。
回答by Yimihua
This works for me on Mac on Hadoop 2.6.0:
这对我在 Hadoop 2.6.0 上的 Mac 上有效：
hadoop/2.6.0/libexec/share/hadoop/common/hadoop-common-2.6.0.jar
or just search ".jar" in the hadoop directory, you can see all the .jar files.
或者直接在hadoop目录下搜索“.jar”，就可以看到所有的.jar文件。
回答by Venkatt Guhesan
hadoop-core-{version}.jarbecame hadoop-common-{version}.jarstarting with Hadoop 2+
hadoop-core-{version}.jar成为hadoop-common-{version}.jar开始用Hadoop 2+
回答by Satyajit Mishra
We can get the jar files from https://mvnrepository.comwebsite.
我们可以从https://mvnrepository.com网站获取 jar 文件。
Example - https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-core/1.2.1
示例 - https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-core/1.2.1
回答by Henry
On hadoop 2.7.2, I had to set it to the same as HADOOP_COMMON_HOME.
在 hadoop 2.7.2 上，我必须将其设置为与 HADOOP_COMMON_HOME 相同。
回答by Ankush
At below location you can find folder named by distribution which you have installed , inside that there is a jar folder. /opt/cloudera/parcels/[cloudera distribution]/jars/
在下面的位置，您可以找到以您安装的发行版命名的文件夹，里面有一个 jar 文件夹。/opt/cloudera/parcels/[cloudera 发行版]/jars/
Example : /opt/cloudera/parcels/CDH-5.4.10/jars
示例：/opt/cloudera/parcels/CDH-5.4.10/jars
