How to decompress the hadoop reduce output file end with snappy?

StackOverflow https://stackoverflow.com/questions/19805149

  •  04-07-2022
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Question

Our hadoop cluster using snappy as default codec. Hadoop job reduce output file name is like part-r-00000.snappy. JSnappy fails to decompress the file bcz JSnappy requires the file start with SNZ. The reduce output file start with some bytes 0 somehow.

How could I decompress the file?

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Solution

Use "Hadoop fs -text" to read this file and pipe it to txt file. ex:

hadoop fs -text part-r-00001.snappy > /tmp/mydatafile.txt

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