问题描述：

spark.SparkContext: Created broadcast 0 from textFile at WordCount.scala:37
Exception in thread "main" java.lang.RuntimeException: Error in configuring object
.........
//往下N多行
Caused by: java.lang.ClassNotFoundException: Class com.hadoop.compression.lzo.LzoCodec not found
	at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2499)

问题原因：
Spark on Yarn会默认使用Hadoop集群配置文件设置编码方式，但是Spark在自己的spark-yarn/jars 包里面没有找到支持lzo压缩的jar包，所以报错。
问题解决方案：
解决方案一：拷贝lzo的包到/opt/module/spark-yarn/jars目录

cp /opt/module/hadoop-3.1.3/share/hadoop/common/hadoop-lzo-0.4.20.jar /opt/module/spark-yarn/jars	

解决方案二：在执行命令的时候指定lzo的包位置
bin/spark-submit
–class com.lu.spark.WordCount
–master yarn
–driver-class-path /opt/module/hadoop-3.1.3/share/hadoop/common/hadoop-lzo-0.4.20.jar
WordCount.jar
/input
/output