spark中怎么配置启用LZO压缩

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Spark中配置启用LZO压缩，步骤如下：
一、spark-env.sh配置

1. export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/app/hadoop-2.6.0-cdh6.7.0/lib/native
   export SPARK_LIBRARY_PATH=$SPARK_LIBRARY_PATH:/app/hadoop-2.6.0-cdh6.7.0/lib/native
   export SPARK_CLASSPATH=$SPARK_CLASSPATH:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/yarn/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/yarn/lib/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/common/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/common/lib/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/hdfs/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/hdfs/lib/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/mapreduce/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/mapreduce/lib/*:/app/hadoop-2.6.0-cdh6.7.0/share/hadoop/tools/lib/*:/app/spark-2.2.0-bin-2.6.0-cdh6.7.0/jars/*

2、无法找到LzopCodec类
   2.1、错误提示：

1. Caused by: java.lang.IllegalArgumentException: Compression codec com.hadoop.compression.lzo.LzopCodec not found.

2.     at org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:135)

3.     at org.apache.hadoop.io.compress.CompressionCodecFactory.<init>(CompressionCodecFactory.java:175)

4.     at org.apache.hadoop.mapred.TextInputFormat.configure(TextInputFormat.java:45)

5. Caused by: java.lang.ClassNotFoundException: Class com.hadoop.compression.lzo.LzopCodec not found

6.     at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:1980)

7.     at org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:128)

   2.2、解决办法：在spark的conf中配置spark-defaults.conf，增加以下内容：

1. spark.driver.extraClassPath /app/hadoop-2.6.0-cdh6.7.0/share/hadoop/common/hadoop-lzo-0.4.19.jar

2. spark.executor.extraClassPath /app/hadoop-2.6.0-cdh6.7.0/share/hadoop/common/hadoop-lzo-0.4.19.jar

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