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Posted to issues@spark.apache.org by "Joseph K. Bradley (JIRA)" <ji...@apache.org> on 2015/12/16 21:01:46 UTC
[jira] [Commented] (SPARK-12367) NoSuchElementException during
prediction with Random Forest Regressor
[ https://issues.apache.org/jira/browse/SPARK-12367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15060720#comment-15060720 ]
Joseph K. Bradley commented on SPARK-12367:
-------------------------------------------
This is likely caused by a feature value 1.0 which did not appear in the training data. That prevents VectorIndexer from knowing about that value, so it does not have a corresponding index when trying to transform the test data. It will be handled by [SPARK-12375].
> NoSuchElementException during prediction with Random Forest Regressor
> ---------------------------------------------------------------------
>
> Key: SPARK-12367
> URL: https://issues.apache.org/jira/browse/SPARK-12367
> Project: Spark
> Issue Type: Bug
> Components: ML
> Affects Versions: 1.5.2
> Reporter: Eugene Morozov
> Attachments: CodeThatGivesANoSuchElementException.java, complete-stack-trace.log, input.gz
>
>
> I'm consistently getting "java.util.NoSuchElementException: key not found: 1.0" while trying to do a prediction on a trained model.
> I use ml package - Pipeline API. The model is successfully trained, I see some stats in the output: total, findSplitsBins, findBestSplits, chooseSplits. I can even serialize it into a file and use afterwards, but the prediction is broken somehow.
> Code, input data and stack trace attached.
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