我在使用mlutils saveaslibsvmfile时遇到上述错误。尝试了各种方法，如下面，但没有工作。
/*
conf.set("spark.io.compression.codec","org.apache.spark.io.LZFCompressionCodec")
*/
/*
conf.set("spark.executor.extraClassPath","/usr/hdp/current/hadoop-client/lib/snappy-java-*.jar")
conf.set("spark.driver.extraClassPath","/usr/hdp/current/hadoop-client/lib/snappy-java-*.jar")
conf.set("spark.executor.extraLibraryPath","/usr/hdp/2.3.4.0-3485/hadoop/lib/native")
conf.set("spark.driver.extraLibraryPath","/usr/hdp/2.3.4.0-3485/hadoop/lib/native")
*/我阅读了以下链接https://community.hortonworks.com/questions/18903/this-version-of-libhadoop-was-built-without-snappy.html
最后只有两种方法可以解决它。答案如下。
1条答案
按热度按时间e4eetjau1#
一种方法是使用不同的hadoop编解码器，如下所示
sc.hadoopConfiguration.set("mapreduce.output.fileoutputformat.compress", "true") sc.hadoopConfiguration.set("mapreduce.output.fileoutputformat.compress.type", CompressionType.BLOCK.toString) sc.hadoopConfiguration.set("mapreduce.output.fileoutputformat.compress.codec", "org.apache.hadoop.io.compress.BZip2Codec") sc.hadoopConfiguration.set("mapreduce.map.output.compress", "true") sc.hadoopConfiguration.set("mapreduce.map.output.compress.codec", "org.apache.hadoop.io.compress.BZip2Codec")第二种方法是提到驱动程序库路径/usr/hdp/<whatever is your current version>/hadoop/lib/native/作为spark submit作业的参数（在命令行中）