NoClassDefFoundError com.apache.hadoop.fs.FSDataInputStream when execute spark-shell

Question

I\'ve downloaded the prebuild version of spark 1.4.0 without hadoop (with user-provided Haddop). When I ran the spark-shell command, I got this error:

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Answer 1

I ran into the same error when trying to get familiar with spark. My understanding of the error message is that while spark doesn't need a hadoop cluster to run, it does need some of the hadoop classes. Since I was just playing around with spark and didn't care what version of hadoop libraries are used, I just downloaded a spark binary pre-built with a version of hadoop (2.6) and things started working fine.