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Don't set_params at the end of set_state. #4947

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merged 2 commits into from
Oct 15, 2019
Merged

Don't set_params at the end of set_state. #4947

merged 2 commits into from
Oct 15, 2019

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trivialfis
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  • Also fix another issue found in dask prediction.

JohnZed
JohnZed approved these changes Oct 15, 2019
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Changes look good and fix the pickling issue. Worth considering that test improvement I mention, but I'd consider it optional

tests/python/test_pickling.py Outdated Show resolved Hide resolved
@trivialfis
Don't set_params at the end of set_state.
18a6998 
* Also fix another issue found in dask prediction.
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trivialfis commented Oct 15, 2019 •
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Also partially revert the previous fix. My brain is fried ... Let me get a thorough look.

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For others following, this appears to be a fundamental error in python serialisation where the model can be pickled and unpickled multiple times, resulting in a different model.

@trivialfis
Add note about prediction.
32661f3 
Don't support other prediction modes at the moment.
@trivialfis trivialfis merged commit 7e72a12 into dmlc:master Oct 15, 2019
JohnZed added a commit to rapidsai/xgboost that referenced this pull request Oct 15, 2019
@JohnZed
Merge pull request #16 from dmlc/master
dc8d8d8 
Don't `set_params` at the end of `set_state`. (dmlc#4947)
@trivialfis trivialfis deleted the fix-pickling branch October 15, 2019 15:15
@trivialfis trivialfis mentioned this pull request Oct 15, 2019
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@RAMitchell RAMitchell RAMitchell approved these changes

@JohnZed JohnZed JohnZed approved these changes

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@trivialfis @RAMitchell @JohnZed