java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/MasterNotRunningException [英] java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/MasterNotRunningException

问题描述

我是用自己的 HBase java 客户端代码创建的，但是我很难编译它并让它运行.我正在从命令行进行编译，但我找不到任何有关如何执行此操作的说明，或者我的类路径中需要有哪些 jar.

I created by own HBase java client code, but I am having a really difficult time compiling it and getting it to run. I am compiling from the command line, and I havent been able to find any instructions how to do this, or what jars I need to have on my classpath.

以下是我使用的类路径:

Below is the classpath I'm using:

$HADOOP_HOME/hadoop/hadoop-0.20.2/hadoop-0.20.2-core.jar:
$HADOOP_HOME/hbase/hbase-0.90.0/hbase-0.90.0.jar:
$HADOOP_HOME/hbase/lib/zookeeper-3.3.2.jar

当我运行 javac 命令时，它编译得很好.但是，当我运行 Java 代码时，出现以下错误:

When I run the javac command, it compiles fine. However, when I run my java code, I get the below error:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/MasterNotRunningException
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.MasterNotRunningException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: HBaseConnection.  Program will exit.  

我错过了什么?

谢谢！

推荐答案

类 org.apache.hadoop.hbase.MasterNotRunning 在类路径上不可用.您很可能还没有设置类路径来包含 hadoop jar.这可以像拼写错误一样简单(必须扩展 $HOME).

The class org.apache.hadoop.hbase.MasterNotRunning is not available on the classpath. You most likely have not set up the classpath to include the hadoop jar. This can be as simple as a misspelling (and $HOME must be expanded).

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