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fix memory leak during broadcasting #125

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fix memory leak during broadcasting #125

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pcmoritz
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found and reported by @nhe150, fixes issue #123

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nhe150 commented May 20, 2016

get rid of destroy since there is a lot of testing based on driver still need the variable. only put in unpersist().

Find it out the hard way.

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nhe150 commented May 20, 2016

there is interleaving issue to use unpersist() also.

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nhe150 commented May 20, 2016

find out it is due to learning rate issue. both destroy and unpersist() is good to be used.
some learning rate will cause worker to learn nothing, the weight become NaN. :(

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nhe150 commented Jun 7, 2016

This is also related to bytedeco/javacpp-presets#238

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