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From Madabhattula Rajesh Kumar <mrajaf...@gmail.com>
Subject Stand Alone Cluster - Strange issue
Date Tue, 22 Dec 2015 17:34:30 GMT
Hi,

I have a standalone cluster. One Master + One Slave. I'm getting below
"NULL POINTER" exception.

Could you please help me on this issue.


*Code Block :-*
 val accum = sc.accumulator(0)
sc.parallelize(Array(1, 2, 3, 4)).foreach(x => accum += x) *==> This line
giving exception.*

Exception :-

15/12/22 09:18:26 WARN scheduler.TaskSetManager: Lost task 1.0 in stage 0.0
(TID 1, 172.25.111.123): *java.lang.NullPointerException*
    at com.cc.ss.etl.Main$$anonfun$1.apply$mcVI$sp(Main.scala:25)
    at com.cc.ss.etl.Main$$anonfun$1.apply(Main.scala:25)
    at com.cc.ss.etl.Main$$anonfun$1.apply(Main.scala:25)
    at scala.collection.Iterator$class.foreach(Iterator.scala:727)
    at
org.apache.spark.InterruptibleIterator.foreach(InterruptibleIterator.scala:28)
    at
org.apache.spark.rdd.RDD$$anonfun$foreach$1$$anonfun$apply$28.apply(RDD.scala:890)
    at
org.apache.spark.rdd.RDD$$anonfun$foreach$1$$anonfun$apply$28.apply(RDD.scala:890)
    at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1848)
    at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1848)
    at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
    at org.apache.spark.scheduler.Task.run(Task.scala:88)
    at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
    at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

15/12/22 09:18:26 INFO scheduler.TaskSetManager: Lost task 0.0 in stage 0.0
(TID 0) on executor 172.25.111.123: java.lang.NullPointerException (null)
[duplicate 1]
15/12/22 09:18:26 INFO scheduler.TaskSetManager: Starting task 0.1 in stage
0.0 (TID 2, 172.25.111.123, PROCESS_LOCAL, 2155 bytes)
15/12/22 09:18:26 INFO scheduler.TaskSetManager: Starting task 1.1 in stage
0.0 (TID 3, 172.25.111.123, PROCESS_LOCAL, 2155 bytes)
15/12/22 09:18:26 WARN scheduler.TaskSetManager: Lost task 1.1 in stage 0.0
(TID 3, 172.25.111.123):

Regards,
Rajesh

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