[GitHub] incubator-predictionio issue #441: pio batchpredict error

[mars]

Github user mars commented on the issue:

    https://github.com/apache/incubator-predictionio/pull/441
  
    @shimamoto yes, it requires two SparkContexts because PredictionIO 
implicitly stops the first one after preparing deploy, so it cannot be reused 
for the second instance to run queries.
    
    I don’t understand what causes this error here, as the two SparkContexts 
normally work correctly.


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