启动hbase出现 java.lang.NoClassDefFoundError: org/apache/zookeeper/KeeperException
在伪分布式下启动hadoop后，启动hbase。启动前没对关于hbase的环境有关的变量进行配置，
启动如下，出现异常
thinkpad@thinkpad-117f6f ~/hbase-0.94.4
$ bin/start-hbase.sh
localhost: +======================================================================+
localhost: | Error: JAVA_HOME is not set and Java could not be found |
localhost: +----------------------------------------------------------------------+
localhost: | Please download the latest Sun JDK from the Sun Java web site |
localhost: | > http://java.sun.com/javase/downloads/ < |
localhost: | |
localhost: | HBase requires Java 1.6 or later. |
localhost: | NOTE: This script will find Sun Java whether you install using the |
localhost: | binary or the RPM based installer. |
localhost: +======================================================================+
starting master, logging to /home/thinkpad/hbase-0.94.4/bin/../logs/hbase-thinkpad-master-thinkpad-117f6f.out
java.lang.NoClassDefFoundError: org/apache/zookeeper/KeeperException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2451)
at java.lang.Class.getMethod0(Class.java:2694)
at java.lang.Class.getMethod(Class.java:1622)
at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:494)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:486)
Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.KeeperException
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
localhost: +======================================================================+
localhost: | Error: JAVA_HOME is not set and Java could not be found |
localhost: +----------------------------------------------------------------------+
localhost: | Please download the latest Sun JDK from the Sun Java web site |
localhost: | > http://java.sun.com/javase/downloads/ < |
localhost: | |
localhost: | HBase requires Java 1.6 or later. |
localhost: | NOTE: This script will find Sun Java whether you install using the |
localhost: | binary or the RPM based installer. |
localhost: +======================================================================+
可以看出是JAVA_HOME没设置，在网上搜索出了关于的这个问题 见http://stackoverflow.com/questions/10936924/hbase-0-92-standalone-on-windows-with-cygwin
对出现的这个异常回答的很充分。
一定要在hbase-env.sh中添加JAVA_HOME和hbase的classpath两个变量，缺一不可。
export JAVA_HOME="/usr/local/jdk1.7.0_13"
export HBASE_CLASSPATH=/home/thinkpad/hbase-0.94.4/lib/
说明：
下面两个不需要在系统 如.bashrc中设置，也不需要社设置hbase的。
#export HADOOP_HOME="/home/thinkpad/hadoop-1.0.4"
#export PATH=$HADOOP_HOME/bin:$PATH
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