Github user maropu commented on the issue:
https://github.com/apache/incubator-hivemall/pull/22
@myui In running these tests, a spark context and unit tests work in the
same JVM. The context uses at most 1g memory by default. So, in some
conditions, the unit tests run short of memory, I think. If we set 3g at the
value, the context uses 1g and the tests do 2g. That sounds fine to me.
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