Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/2178#issuecomment-54194317
The test doesn't assume a particular implementation of shuffle. I am able
to reproduce it locally and I found that this test only fails if
`spark.shuffle.spill.compress` is set to false (default is true). From the
exception message it could be that we're trying to uncompress the spilled files
to read them back in when they're not actually compressed, though I still need
to dig more into this.
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