Task not serializable error in scala spark : I have two variable bellow:

var rddPair1 : ```Array[(String, String)] = Array((0000003,杉山______ 26 F), (0000005,崎村______ 50 F), (0000007,梶川______ 42 F))```

and 

var rddPair2 : ``` Array[(String, String)] = Array((0000005,82 79 16 21 80), (0000001,46 39 8 5 21), (0000004,58 71 20 10 6), (0000009,60 89 33 18 6), (0000003,30 50 71 36 30), (0000007,50 2 33 15 62)) ```

The code below use to full outer join 2 variables:

```scala
var emp =rddPair1.first._2.replaceAll("\\S", "*") //emp:String = ***** ** *
rddPair1.fullOuterJoin(rddPair2).map {
  case (id, (left, right)) =>
    (id,left.getOrElse(emp)+" "+ right)
}.collect()
```


And I get an error like the below:

<pre>

    org.apache.spark.SparkException: Task not serializable
      at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:403)
      at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner.scala:393)
      at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:162)
      at org.apache.spark.SparkContext.clean(SparkContext.scala:2326)
      at org.apache.spark.rdd.RDD$$anonfun$map$1.apply(RDD.scala:371)
      at org.apache.spark.rdd.RDD$$anonfun$map$1.apply(RDD.scala:370)
      at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
      at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
      at org.apache.spark.rdd.RDD.withScope(RDD.scala:363)
      at org.apache.spark.rdd.RDD.map(RDD.scala:370)
      ... 56 elided
    Caused by: java.io.NotSerializableException: org.apache.spark.SparkContext
    Serialization stack:
            - object not serializable (class: org.apache.spark.SparkContext, value: org.apache.spark.SparkContext@4d87e7f3)
            - field (class: $iw, name: spark, type: class org.apache.spark.SparkContext)
            - object (class $iw, $iw@65af4162)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@7da837af)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@54d0724f)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@389ae8f1)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@55ecf961)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@428c9250)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@d931617)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@2625c1cc)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@1231e446)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@27dbe9a3)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@63ad2a0f)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@203f41d7)
            - field (class: $line19.$read, name: $iw, type: class $iw)
            - object (class $line19.$read, $line19.$read@46a9af36)
            - field (class: $iw, name: $line19$read, type: class $line19.$read)
            - object (class $iw, $iw@19d118d5)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@5dac488d)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@1bba5848)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@4f1a6259)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@25712d03)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@750c242e)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@ad038f8)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@4ba64e36)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@223f8c82)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@ba1f5d1)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@4355f7b6)
            - field (class: $line22.$read, name: $iw, type: class $iw)
            - object (class $line22.$read, $line22.$read@44535df8)
            - field (class: $iw, name: $line22$read, type: class $line22.$read)
            - object (class $iw, $iw@32e14e55)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@5a78e7e3)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@28736857)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@16be6b36)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@211e1b51)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@1cce2194)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@7b31281b)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@63c9017b)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@e343477)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@3a182eaf)
            - field (class: $iw, name: $iw, type: class $iw)
            - object (class $iw, $iw@131af11d)
            - field (class: $line24.$read, name: $iw, type: class $iw)
            - object (class $line24.$read, $line24.$read@7cb39309)
            - field (class: $iw, name: $line24$read, type: class $line24.$read)
            - object (class $iw, $iw@282afe91)
            - field (class: $iw, name: $outer, type: class $iw)
            - object (class $iw, $iw@33592b53)
            - field (class: $anonfun$1, name: $outer, type: class $iw)
            - object (class $anonfun$1, <function1>)
      at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
      at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:46)
      at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:100)
      at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:400)
      ... 65 more 

</pre>

I am a newbie so my sentence is not good, so please understand and  help me please