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Spark com.databricks.spark.csv无法使用node-snappy加载snappy压缩文件

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我在S3上有一些使用snappy压缩算法压缩的csv文件(使用 node-snappy 包) . 我喜欢使用 com.databricks.spark.csv 在spark中处理这些文件,但我一直收到无效的文件输入错误 .

码:

file_df = sqlContext.read.format('com.databricks.spark.csv').options(header='true', inferschema='true', codec='snappy', mode='FAILFAST').load('s3://sample.csv.snappy')

错误信息:

16/09/24 21:57:25 WARN TaskSetManager:阶段0.0中丢失的任务0.0(TID 0,ip-10-0-32-5.ec2.internal):java.lang.InternalError:无法解压缩数据 . 输入无效 . org.apache.hadoop.io.compress.snappy.SnappyDecompressor.decompressBytesDirect(Native Method)位于org.apache.hadoop的org.apache.hadoop.io.compress.snappy.SnappyDecompressor.decompress(SnappyDecompressor.java:239) . io.compress.BlockDecompressorStream.decompress(BlockDecompressorStream.java:88)atg.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:85)at java.io.InputStream.read(InputStream.java:101)在org.apache.hadoop.util.LineReader.fillBuffer(LineReader.java:180)在org.apache.hadoop.util.LineReader.readDefaultLine(LineReader.java:216)在org.apache.hadoop.util.LineReader.readLine (LineReader.java:174)在org.apache.hadoop.mapred.LineRecordReader.skipUtfByteOrderMark(LineRecordReader.java:208)在org.apache.hadoop.mapred.LineRecordReader.next(LineRecordReader.java:246)在org.apache . hadoop.mapred.LineRecordReader.next(LineRecordReader.java:48)atg.apache.spark.rdd.HadoopRDD $$ anon $ 1.getNext(HadoopRDD.scala:255)at org.apache.spark.rdd.HadoopRDD $$ anon $ 1位于org.apache.spark.util.NextIterator.hasNext(NextIterator.scala:73)的getNext(HadoopRDD.scala:209)位于scala.collection.Iterator的org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39) $ anon $ 11.hasNext(Iterator.scala:408)at scala.collection.Iterator $$ anon $ 13.hasNext(Iterator.scala:461)at scala.collection.Iterator $$ anon $ 10.hasNext(Iterator.scala:389) )scala.collection.Iterator $ class.foreach(Iterator.scala:893)at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)at scala.collection.generic.Growable $ class . $ plus $ plus $ eq (Growable.scala:59)at scala.collection.mutable.ArrayBuffer . $ plus $ plus $ eq(ArrayBuffer.scala:104)at scala.collection.mutable.ArrayBuffer . $ plus $ plus $ eq(ArrayBuffer.scala:48 )scala.collection.TraversableOnce $ class.to(TraversableOnce.scala:310)at scala.collection.AbstractIterator.to(Iterator.scala:1336)at scala.collection.TraversableOnce $ class.toBuffer(TraversableOnce.scala:302)在scala.collection.AbstractIterator.toBuffer(Iterato r.scala:1336)scala.collection.TraversableOnce $ class.toArray(TraversableOnce.scala:289)at scala.collection.AbstractIterator.toArray(Iterator.scala:1336)at org.apache.spark.rdd.RDD $$ anonfun $在org.apache上获取$ 1 $$ anonfun $ 29.apply(RDD.scala:1305)org.apache.spark.rdd.RDD $$ anonfun $ take $ 1 $$ anonfun $ 29.apply(RDD.scala:1305)at org.apache .spark.SparkContext $$ anonfun $ runJob $ 5.apply(SparkContext.scala:1897)org.apache.spark.SparkContext $$ anonfun $ runJob $ 5.apply(SparkContext.scala:1897)at org.apache.spark.scheduler .ResultTask.runTask(ResultTask.scala:70)atg.apache.spark.scheduler.Task.run(Task.scala:85)at org.apache.spark.executor.Executor $ TaskRunner.run(Executor.scala:274) )java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)at java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:617)at java.lang.Thread.run(Thread.java: 745)

1 回答

  • 0

    看起来像回答的问题here - 基本上python snappy与Hadoop snappy不兼容 .

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