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Waikato / moa

MOA is an open source framework for Big Data stream mining. It includes a collection of machine learning algorithms (classification, regression, clustering, outlier detection, concept drift detection and recommender systems) and tools for evaluation.
http://moa.cms.waikato.ac.nz/
GNU General Public License v3.0
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Recommender system example throws exception #155

Closed henrygouk closed 3 years ago

henrygouk commented 5 years ago

I get the following error when trying to run the recommender system example using code in master.

*** STACK TRACE ***java.lang.ClassCastException: class java.lang.String cannot be cast to class moa.evaluation.preview.Preview (java.lang.String is in module java.base of loader 'bootstrap'; moa.evaluation.preview.Preview is in unnamed module of loader 'app')
    at moa.gui.PreviewPanel.setLatestPreview(PreviewPanel.java:171)
    at moa.gui.PreviewPanel.setTaskThreadToPreview(PreviewPanel.java:144)
    at moa.gui.PreviewPanel.latestPreviewChanged(PreviewPanel.java:220)
    at moa.tasks.StandardTaskMonitor.setLatestResultPreview(StandardTaskMonitor.java:141)
    at moa.tasks.EvaluateOnlineRecommender.doMainTask(EvaluateOnlineRecommender.java:128)
    at moa.tasks.MainTask.doTaskImpl(MainTask.java:50)
    at moa.tasks.AbstractTask.doTask(AbstractTask.java:57)
    at moa.tasks.TaskThread.run(TaskThread.java:76)
henrygouk commented 5 years ago

Running from the command line is successful. This is possibly something to do with #146?

abifet commented 5 years ago

Yes, it may be. Is it solved now?