Hadoop：不能使用Jps命令 [英] Hadoop: Cannot use Jps command

问题描述

问题是：

  hduser @ saket -K53SM：/ usr / local / hadoop $ jps 
程序'jps'可以在以下软件包中找到：
 * openjdk-6-jdk 
 * openjdk-7-jdk 
尝试：sudo apt-get install< selected package> 
  

我的配置是

  hduser @ saket-K53SM：/ usr / local / hadoop $ java -version 
 java版本1.6.0_33
 Java™SE运行时环境（build 1.6.0_33- b04）
 Java HotSpot™64位服务器虚拟机（构建20.8-b03，混合模式）
  

设置conf / hadoop-env.sh

  hduser @ saket -K53SM：/ usr / local / hadoop $ cat conf / hadoop-env.sh | grep JAVA_HOME 
＃唯一需要的环境变量是JAVA_HOME。所有其他的都是
＃在这个文件中设置JAVA_HOME，以便它在
上正确定义export JAVA_HOME = / usr / lib / jvm / jdk1.6.0_33 / 
  

我知道有一个问题（http://stackoverflow.com/questions/7843422/hadoop-jps-can-not-find-java-安装）与此类似。
但是我在这里安装了Sun jdk。所以任何帮助将不胜感激。

解决方案

这实际上不是Hadoop问题。 Hadoop不使用JPS。

如果找不到JPS，则必须将其放入路径或创建别名。
可以在 $ JAVA_HOME / bin / jps 下找到JPS可执行文件。

例如别名可以是：
$ b $ pre> alias jps ='/ usr / lib / jvm / jdk1.6.0_33 / bin / jps'


或者如果您不关心使用JPS，您可以改为使用

  ps aux | grep java 
  

给你相同的结果;）

The problem is

  hduser@saket-K53SM:/usr/local/hadoop$ jps
  The program 'jps' can be found in the following packages:
  * openjdk-6-jdk
  * openjdk-7-jdk
 Try: sudo apt-get install <selected package>

My configuration is

hduser@saket-K53SM:/usr/local/hadoop$ java -version
java version "1.6.0_33"
Java(TM) SE Runtime Environment (build 1.6.0_33-b04)
Java HotSpot(TM) 64-Bit Server VM (build 20.8-b03, mixed mode)

set up conf/hadoop-env.sh

hduser@saket-K53SM:/usr/local/hadoop$ cat conf/hadoop-env.sh | grep JAVA_HOME
# The only required environment variable is JAVA_HOME.  All others are
# set JAVA_HOME in this file, so that it is correctly defined on
export JAVA_HOME=/usr/lib/jvm/jdk1.6.0_33/

I know there is a question (http://stackoverflow.com/questions/7843422/hadoop-jps-can-not-find-java-installed) similar to this one. But i have installed Sun jdk here. So any help would be appreciated..

解决方案

That is actually not a Hadoop problem. Hadoop does not use JPS.

If JPS can't be found, you have to put it into your path or create an alias. The JPS executable can be found under $JAVA_HOME/bin/jps.

The alias for example could be:

alias jps='/usr/lib/jvm/jdk1.6.0_33/bin/jps'

Or if you don't care about using JPS, you could instead do a

ps aux | grep java

which will approx. give you the same result ;)

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