Dennis Hendriks created MATH-927:
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Summary: GammaDistribution cloning broken
Key: MATH-927
URL: https://issues.apache.org/jira/browse/MATH-927
Project: Commons Math
Issue Type: Bug
Affects Versions: 3.1
Reporter: Dennis Hendriks
Serializing a GammaDistribution and deserializing it, does not result in a
cloned distribution that produces the same samples.
Cause: GammaDistribution inherits from AbstractRealDistribution, which
implements Serializable. AbstractRealDistribution has random, in which we have
a Well19937c instance, which inherits from AbstractWell. AbstractWell
implements Serializable. AbstractWell inherits from BitsStreamGenerator, which
is not Serializable, but does have a private field 'nextGaussian'.
Solution: Make BitStreamGenerator implement Serializable as well.
This probably affects other distributions as well.
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