java jps 没有,Hadoop：JPS找不到安装的Java

my configurations are

hduser@worker1:/usr/local/hadoop/conf$ jps

The program 'jps' can be found in the following packages:

* openjdk-6-jdk

* openjdk-7-jdk

Ask your administrator to install one of them

I have java installed though

hduser@worker1:/usr/local/hadoop/conf$ java -version

java version "1.6.0_23"

OpenJDK Runtime Environment (IcedTea6 1.11pre) (6b23~pre10-0ubuntu5)

OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)

hduser@worker1:/usr/local/hadoop/conf$ echo $JAVA_HOME

/usr/lib/jvm/java-1.6.0-openjdk

and also set up in conf/hadoop-env.sh

hduser@worker1:/usr/local/hadoop/conf$ cat 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/java-1.6.0-openjdk

How can I make JPS work?

解决方案

It seems like open-jdk does not have jps in it.

For hadoop, installing sun-jvm would be a better choice.