Github user gaborhermann commented on the issue:
https://github.com/apache/flink/pull/2542
I agree. I already fixed the seed at the `ImplicitALSITSuite`. At the
`ALSITSuite` the seed is unset, but by default it's 0, that's why `ALSITSuite`
is deterministic, so I don't think it's a problem. Although, I would reconsider
setting the default seed, because that way two training for the same parameters
yields the same result, and that might not be what do user expects. The user
might expect truly randomized result.
Do you think we should modify the default optional seed `Some(0L)` to be
`None`, and use the system random generator by default? Again, this is in the
original algorithm. Should we do it in this PR or create another issue for
refactoring ALS?
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