You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:16:33 UTC
[jira] [Resolved] (SPARK-17048) ML model read for custom
transformers in a pipeline does not work
[ https://issues.apache.org/jira/browse/SPARK-17048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon resolved SPARK-17048.
----------------------------------
Resolution: Incomplete
> ML model read for custom transformers in a pipeline does not work
> ------------------------------------------------------------------
>
> Key: SPARK-17048
> URL: https://issues.apache.org/jira/browse/SPARK-17048
> Project: Spark
> Issue Type: Bug
> Components: ML
> Affects Versions: 2.0.0
> Environment: Spark 2.0.0
> Java API
> Reporter: Taras Matyashovskyy
> Priority: Major
> Labels: bulk-closed, easyfix, features
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> 0. Use Java API :(
> 1. Create any custom ML transformer
> 2. Make it MLReadable and MLWritable
> 3. Add to pipeline
> 4. Evaluate model, e.g. CrossValidationModel, and save results to disk
> 5. For custom transformer you can use DefaultParamsReader and DefaultParamsWriter, for instance
> 6. Load model from saved directory
> 7. All out-of-the-box objects are loaded successfully, e.g. Pipeline, Evaluator, etc.
> 8. Your custom transformer will fail with NPE
> Reason:
> ReadWrite.scala:447
> cls.getMethod("read").invoke(null).asInstanceOf[MLReader[T]].load(path)
> In Java this only works for static methods.
> As we are implementing MLReadable or MLWritable, then this call should be instance method call.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org