HBase与mapreduce集成操作，以及出错的解决方法

集成环境： hbase-0.98.6-hadoop2 + zookeeper + hadoop-2.6.0   主节点：Master  从节点：Slave1 和 Slave2

1. 将写好的代码打成xxxxxx.jar（例如：hbase-mr-testbasic.jar）

2. 在命令窗口执行如下命令：

[root@Master 桌面]# cd /usr/soft/hadoop-2.6.0/
[root@Master hadoop-2.6.0]# export HBASE_HOME=/usr/soft/hbase-0.98.6-hadoop2
[root@Master hadoop-2.6.0]# export HADOOP_HOME=/usr/soft/hadoop-2.6.0
[root@Master hadoop-2.6.0]# HADOOP_CLASSPATH='${HBASE_HOME}/bin/hbase mapredcp' $HADOOP_HOME/bin/yarn jar jars/hbase-mr-testbasic.jar

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/HBaseConfiguration
	at cn.hbase.study.TestBasicMapReduce.main(TestBasicMapReduce.java:119)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.HBaseConfiguration
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	... 7 more

解决方法：

在hadooop/etc/hadoop/hadoop-env.sh中添加 

export HADOOP_CLASSPATH=/usr/soft/hbase-0.98.6-hadoop2/lib/*

# Specify the JVM options to be used when starting the HDFS Mover.
# These options will be appended to the options specified as HADOOP_OPTS
# and therefore may override any similar flags set in HADOOP_OPTS
#
# export HADOOP_MOVER_OPTS=""

###
# Advanced Users Only!
###

# The directory where pid files are stored. /tmp by default.
# NOTE: this should be set to a directory that can only be written to by 
#       the user that will run the hadoop daemons.  Otherwise there is the
#       potential for a symlink attack.
export HADOOP_PID_DIR=${HADOOP_PID_DIR}
export HADOOP_SECURE_DN_PID_DIR=${HADOOP_PID_DIR}


# A string representing this instance of hadoop. $USER by default.
export HADOOP_IDENT_STRING=$USER
export JAVA_HOME=/usr/soft/jdk1.7.0_79

export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:/usr/soft/hbase-0.98.6-hadoop2/lib/*

最后

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