Feature-classifier plugin error

Hi all-
Running the following script / getting the following error...is this just a memory issue?

$ qiime feature-classifier classify-sklearn --i-classifier gg-13-8-99-515-806-nb-classifier.qza --i-reads SPN_S3_R1_R2.join.filteredseqs.qza --o-classification taxonomy.qza

Log entry below:

I was running these data sets through QIIME without any huge memory issues...

Any help would be appreciated!

Try adding the flag --p-pre-dispatch n_jobs or instead of n_jobs, 1. The default is to pre-dispatch 2*n_jobs, so you automatically use twice the amount of memory required to run a single job.


Hi Zach-
Thanks for the suggestion, unfortunately the script failed and reported the same error as before. When I was originally writing the post, the forum paired me up with another post that was similar to mine and the replies mentioned the ‘–p-chunk-size’ option as a route that could help?

Thanks for the assist

Hi @Sausage_Mahoney! --p-chunk-size should be the parameter you are looking for, but hopefully @BenKaehler can provide some additional clarity. Thanks!

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Hi @Sausage_Mahoney, thanks @thermokarst and @ezke.

Reducing the --p-chunk-size (from 262144) may help, but we’ve never had problems with classify-sklearn running out of memory before.

How much memory does your machine have?

If you’re willing to share SPN_S3_R1_R2.join.filteredseqs.qza I would be happy to debug.


Hi Ben-
Thanks for looking into this…I figured out what happened. I was trying to run the classifier using a file that had each sequence collected identified as it’s own unique feature (I was pulling some QIIME files into QIIME2). At any rate, it was trying to classify ~60,000 some odd features and the RAM was imploding. I have it all sorted out now.


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