Exception - Internal error processing getProgress

ERROR [2015-04-17 14:41:42,221] ({pool-1-thread-2} ProcessFunction.java[process]:41) - Internal error processing getProgress
org.apache.zeppelin.interpreter.InterpreterException: java.lang.NumberFormatException: For input string: ""
        at org.apache.zeppelin.interpreter.ClassloaderInterpreter.open(ClassloaderInterpreter.java:75)
        at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:68)
        at org.apache.zeppelin.interpreter.LazyOpenInterpreter.getProgress(LazyOpenInterpreter.java:109)
        at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer.getProgress(RemoteInterpreterServer.java:299)
        at org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$getProgress.getResult(RemoteInterpreterService.java:938)
        at org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$getProgress.getResult(RemoteInterpreterService.java:923)
        at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
        at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:206)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NumberFormatException: For input string: ""
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.lang.Integer.parseInt(Integer.java:592)
        at java.lang.Integer.parseInt(Integer.java:615)
        at scala.collection.immutable.StringLike$class.toInt(StringLike.scala:229)
        at scala.collection.immutable.StringOps.toInt(StringOps.scala:31)
        at org.apache.spark.scheduler.cluster.SparkDeploySchedulerBackend$$anonfun$2.apply(SparkDeploySchedulerBackend.scala:42)
        at org.apache.spark.scheduler.cluster.SparkDeploySchedulerBackend$$anonfun$2.apply(SparkDeploySchedulerBackend.scala:42)
        at scala.Option.map(Option.scala:145)
        at org.apache.spark.scheduler.cluster.SparkDeploySchedulerBackend.<init>(SparkDeploySchedulerBackend.scala:42)
        at org.apache.spark.SparkContext$.org$apache$spark$SparkContext$$createTaskScheduler(SparkContext.scala:2139)
        at org.apache.spark.SparkContext.<init>(SparkContext.scala:363)
        at org.apache.zeppelin.spark.SparkInterpreter.createSparkContext(SparkInterpreter.java:267)
        at org.apache.zeppelin.spark.SparkInterpreter.getSparkContext(SparkInterpreter.java:145)
        at org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:389)
        at org.apache.zeppelin.interpreter.ClassloaderInterpreter.open(ClassloaderInterpreter.java:73)
        ... 11 more
ERROR [2015-04-17 14:41:42,222] ({Thread-33} JobProgressPoller.java[run]:57) - Can not get or update progress
org.apache.zeppelin.interpreter.InterpreterException: org.apache.thrift.TApplicationException: Internal error processing getProgress
        at org.apache.zeppelin.interpreter.remote.RemoteInterpreter.getProgress(RemoteInterpreter.java:287)
        at org.apache.zeppelin.interpreter.LazyOpenInterpreter.getProgress(LazyOpenInterpreter.java:110)
        at org.apache.zeppelin.notebook.Paragraph.progress(Paragraph.java:179)
        at org.apache.zeppelin.scheduler.JobProgressPoller.run(JobProgressPoller.java:54)
Caused by: org.apache.thrift.TApplicationException: Internal error processing getProgress
        at org.apache.thrift.TApplicationException.read(TApplicationException.java:108)
        at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:71)
        at org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Client.recv_getProgress(RemoteInterpreterService.java:235)
        at org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Client.getProgress(RemoteInterpreterService.java:221)
        at org.apache.zeppelin.interpreter.remote.RemoteInterpreter.getProgress(RemoteInterpreter.java:285)
        ... 3 more