[GitHub] incubator-predictionio issue #329: Cannot call methods on a stopped SparkCon...

[wukaishanda08 <gi...@git.apache.org>]

GitHub user wukaishanda08 opened an issue:

    https://github.com/apache/incubator-predictionio/issues/329

    Cannot call methods on a stopped SparkContext

    I build,train,deploy the engine successfully. But when I run the query command, an exception occured.
    
    The template I used is PredictionIO-Churn-Prediction-H2O-Sparkling-Water, which can be got on https://github.com/andrewwuan/PredictionIO-Churn-Prediction-H2O-Sparkling-Water
    
    But when I used the quick-start recommendation template, all processes can run normally.   
    
    The query command is
    
    `curl  -k -H "Content-Type: application/json" -d '{ 'intlPlan': True, 'voiceMailPlan': True,'numVmailMsg': 41, 'totalDayMins': 173.1,'totalDayCalls': 85, 'totalDayCharge': 29.43,'totalEveMins': 203.9, 'totalEveCalls': 107,'totalEveCharge': 17.33, 'totalNightMins': 122.2, 'totalNightCalls': 78, 'totalNightCharge': 14.02,'totalIntlMins': 10.0,'totalIntlCalls': 15, 'totalIntlCharge': 3.94, 'customerServiceCalls': 0}' https://localhost:8150/queries.json`
    
    and the exception log is 
    
    `Stack Trace:
    java.lang.IllegalStateException: Cannot call methods on a stopped SparkContext
    	at org.apache.spark.SparkContext.org$apache$spark$SparkContext$$assertNotStopped(SparkContext.scala:104)
    	at org.apache.spark.SparkContext.defaultParallelism(SparkContext.scala:2061)
    	at org.apache.spark.SparkContext.parallelize$default$2(SparkContext.scala:723)
    	at Algorithm.predict(Algorithm.scala:56)
    	at Algorithm.predict(Algorithm.scala:9)
    	at io.prediction.controller.P2LAlgorithm.predictBase(P2LAlgorithm.scala:70)
    	at io.prediction.workflow.ServerActor$$anonfun$24$$anonfun$25.apply(CreateServer.scala:536)
    	at io.prediction.workflow.ServerActor$$anonfun$24$$anonfun$25.apply(CreateServer.scala:535)
    	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
    	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
    	at scala.collection.immutable.List.foreach(List.scala:318)
    	at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
    	at scala.collection.AbstractTraversable.map(Traversable.scala:105)
    	at io.prediction.workflow.ServerActor$$anonfun$24.apply(CreateServer.scala:535)
    	at io.prediction.workflow.ServerActor$$anonfun$24.apply(CreateServer.scala:513)
    	at spray.routing.ApplyConverterInstances$$anon$22$$anonfun$apply$1.apply(ApplyConverterInstances.scala:25)
    	at spray.routing.ApplyConverterInstances$$anon$22$$anonfun$apply$1.apply(ApplyConverterInstances.scala:24)
    	at spray.routing.ConjunctionMagnet$$anon$1$$anon$2$$anonfun$happly$1$$anonfun$apply$1.apply(Directive.scala:38)
    	at spray.routing.ConjunctionMagnet$$anon$1$$anon$2$$anonfun$happly$1$$anonfun$apply$1.apply(Directive.scala:37)
    	at spray.routing.directives.BasicDirectives$$anon$1.happly(BasicDirectives.scala:26)
    	at spray.routing.ConjunctionMagnet$$anon$1$$anon$2$$anonfun$happly$1.apply(Directive.scala:37)
    	at spray.routing.ConjunctionMagnet$$anon$1$$anon$2$$anonfun$happly$1.apply(Directive.scala:36)
    	at spray.routing.directives.BasicDirectives$$anon$2.happly(BasicDirectives.scala:79)
    	at spray.routing.Directive$$anon$7$$anonfun$happly$4.apply(Directive.scala:86)
    	at spray.routing.Directive$$anon$7$$anonfun$happly$4.apply(Directive.scala:86)
    	at spray.routing.directives.BasicDirectives$$anon$3$$anonfun$happly$1.apply(BasicDirectives.scala:92)
    	at spray.routing.directives.BasicDirectives$$anon$3$$anonfun$happly$1.apply(BasicDirectives.scala:92)
    	at spray.routing.directives.ExecutionDirectives$$anonfun$detach$1$$anonfun$apply$7$$anonfun$apply$3.apply$mcV$sp(ExecutionDirectives.scala:89)
    	at spray.routing.directives.ExecutionDirectives$$anonfun$detach$1$$anonfun$apply$7$$anonfun$apply$3.apply(ExecutionDirectives.scala:89)
    	at spray.routing.directives.ExecutionDirectives$$anonfun$detach$1$$anonfun$apply$7$$anonfun$apply$3.apply(ExecutionDirectives.scala:89)
    	at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
    	at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
    	at scala.concurrent.impl.ExecutionContextImpl$$anon$3.exec(ExecutionContextImpl.scala:107)
    	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)`
    
    Is there anybody knows how to solve this?  Thanks a lot!

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