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[fix] fix Reservoir Sampling in Sample of random.h (fix #4371 and #4134) #4450

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merged 1 commit into from
Jul 7, 2021

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shiyu1994
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Thanks @DexGroves for pointing out the bug in the Reservoir Sampling. It turns out the fix for #4134 in #4324 did not remove the root cause. The real problem is the +1 being missing in int v = NextInt(0, r);. This should solves both #4134 and #4371.

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This pull request has been automatically locked since there has not been any recent activity since it was closed. To start a new related discussion, open a new issue at https://github.com/microsoft/LightGBM/issues including a reference to this.

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