I am using Zeppelin Version 0.7.1 on EMR. I have been using Zeppelin for many months and was working fine. My queries started to slow down. So I restarted Zeppelin, I am now getting the following error. I also tried restarting the Spark Interpreter and it did not help. Please help!
java.lang.NullPointerException at org.apache.zeppelin.spark.Utils.invokeMethod(Utils.java:38) at org.apache.zeppelin.spark.Utils.invokeMethod(Utils.java:33) at org.apache.zeppelin.spark.SparkInterpreter.createSparkContext_2(SparkInterpreter.java:391) at org.apache.zeppelin.spark.SparkInterpreter.createSparkContext(SparkInterpreter.java:380) at org.apache.zeppelin.spark.SparkInterpreter.getSparkContext(SparkInterpreter.java:146) at org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:828) at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70) at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:483) at org.apache.zeppelin.scheduler.Job.run(Job.java:175) at org.apache.zeppelin.scheduler.FIFOScheduler$1.run(FIFOScheduler.java:139) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) 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)
