今天在centos 6.3上搭建了hadoop+hive＋spark 系统，在运行

/usr/local/spark-1.0.0/bin/spark-shell  

出现找不到hive 相关的类，于是修改了spark-env.sh

在spark_classpath 里添加了  hive 的库路径

export SPARK_CLASSPATH=/usr/local/spark-1.0.0/lib_managed/jars/spark-assembly-1.0.0-hadoop2.4.0.jar:/usr/local/spark-1.0.0/assembly/target/scala-2.10/mysql-connector-java-5.1.25-bin.jar:/usr/local/hive-0.13/lib/*

再次运行 

/usr/local/spark-1.0.0/bin/spark-shell   又出现

java.lang.IllegalAccessError: tried to access field org.apache.hadoop.hive.ql.security.HadoopDefaultAuthenticator.conf from class org.apache.hadoop.hive.ql.security.ProxyUserAuthenticator

at org.apache.hadoop.hive.ql.security.ProxyUserAuthenticator.setConf(ProxyUserAuthenticator.java:40)

at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:73)

at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)

at org.apache.hadoop.hive.ql.metadata.HiveUtils.getAuthenticator(HiveUtils.java:365)

at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:278)

at org.apache.spark.sql.hive.HiveContext.<init>(HiveContext.scala:166)

进到 /usr/local/spark-1.0.0/assembly/target/scala-2.10/org/apache/hadoop/hive/ql/security 目录下，把authorization 目录修改成另外一个名字 ，再次运行就成了。 原因应该是类重复了（猜的，呵呵）

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