I have installed Zeppelin 0.7.1
. When I tried to execute the Example spark program(which was available with Zeppelin Tutorial
notebook), I am getting the following error
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$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
I have also setup the config file(zeppelin-env.sh
) to point to my Spark installation & Hadoop configuration directory
export SPARK_HOME="/${homedir}/sk"
export HADOOP_CONF_DIR="/${homedir}/hp/etc/hadoop"
The Spark version I am using is 2.1.0 & Hadoop is 2.7.3
Also I am using the default Spark Interpreter Configuration(so Spark is set to run in Local mode
)
Am I missing something here?
PS : I am able to connect to spark from the Terminal using spark-shell
Restarting the SparkContext only works by using the UI (Menu -> Interpreter -> Spark Interpreter -> click on restart button)
Just now I got solution of this issue for Zeppelin-0.7.2:
Root Cause is : Spark trying to setup Hive context, but hdfs services is not running, that's why HiveContext become null and throwing null pointer exception.
Solution:
1. Setup Saprk Home [optional] and HDFS.
2. Run HDFS service
3. Restart zeppelin server
OR
1. Go to Zeppelin's Interpreter settings.
2. Select Spark Interpreter
3. zeppelin.spark.useHiveContext = false
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