Github user zsxwing commented on the pull request:
https://github.com/apache/spark/pull/6735#issuecomment-110677571
It's because `enclosingObject` in `instantiateClass` is null. The bytecodes
in constructor will check the first field:
```
public
org.apache.spark.streaming.StreamingContext$$anonfun$binaryRecordsStream$1(org.apache.spark.streaming.StreamingContext,
java.lang.String, int);
Code:
0: aload_1
1: ifnonnull 12
4: new #119 // class
java/lang/NullPointerException
7: dup
8: invokespecial #122 // Method
java/lang/NullPointerException."<init>":()V
11: athrow
12: aload_0
13: aload_1
14: putfield #27 // Field
$outer:Lorg/apache/spark/streaming/StreamingContext;
17: aload_0
18: aload_2
19: putfield #57 // Field
directory$2:Ljava/lang/String;
22: aload_0
23: iload_3
24: putfield #49 // Field recordLength$1:I
27: aload_0
28: invokespecial #123 // Method
scala/runtime/AbstractFunction0."<init>":()V
31: return
```
Before this fix, `Utils.isInInterpreter` always returns `true` because of
the wrong class name... Now the code path of `Utils.isInInterpreter == false`
is activated.
I'm looking for a fix for this `NullPointerException`.
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