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：spark-submit提交参数指定
bin/spark-submit --master yarn --name wbwb \ --jars depend/hadoop-lzo-0.4.20.jar \ --class com.atguigu.sparksql.sparksql_hive_sql_myUDAF WordCount-jar-with-dependencies.jar
