Automatic hyperparameter optimization executes for infinite duration in python package

[r-rakshith]

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System configuration:

• Win 10
• Python 3.6.4
• Fasttext is built from source directly from the master branch with the HEAD at commit 02c61efaa6d60d6bb17e6341b790fa199dfb8c83
  • The following command was used to build the fasttext python from source

    pip install .

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Issue:

• On calling the function fasttext.train_supervised with autotuneValidationFile, the hyperparameter optimization runs infinitely instead of the default 5 mins.
  • The progress bar that looks like the one shown below is also not seen.
  • Progress: 30.2% Trials: 10 Best score: 0.711055 ETA: 0h 3m 2s
  • Even with the additional param autotuneDuration set to a smaller value (say 10 seconds), the program runs infinitely with no progress bar displayed.

  • After an extended period of time (say after 30 mins), on sending a SIGINT (via Ctrl+C), the expected message "Aborting autotune..." is displayed and next steps follow normally.

In an attempt to debug the underlying issue, a print statement was added using the std::cout.

• The print statement was added in autotune.cc as shown below
  • 

Even though it sounds silly, adding the print statement fixed the above mentioned issue, the progress on optimization was displayed and it ran for the given duration i.e autotuneDuration seconds.

[andrhn]

same problem. your solution worked for me) thanks a lot) p.s. don't forget to reinstall fasttext after adding new line in autotune.cc

[yaoaaron]

same problem. but adding that line in autotune.cc doesn't work for me after reinstall fasttext. I am using 0.9.2 version. Any one has better ideas on fixing that?

[dmoklaf]

My symptoms are slightly different (MacOS 10.15.7, Python 3.7.8, Fasttext 0.9.2): my autotune job completes correctly. But when I stop the server (through Ctrl+C), I still get a "Aborting autotune..." message (even if the python object is not used anymore) and the program freezes. If I press Ctrl+C again, the program crashes with a "bus error". The Python stack trace of the Python threads shows no thread stuck in fasttext code

[xiongmaoyi]

环境：（Python 3.7.8，Fasttext 0.9.2）， 出现相同的问题，autotuneDuration 配置不生效

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[larissapaz]

Every first execution was working properly and the subsequent ones I was having the same problem. So I was having to restart the visual code for each new run. Your solution solved the problem!

I think it should become a PR!