Github user felixcheung commented on the issue:
https://github.com/apache/zeppelin/pull/2623
is test failure related?
```
15:11:43,740 INFO org.apache.zeppelin.spark.SparkInterpreter:979 - Sending
metadata to Zeppelin server: {message=Spark UI enabled,
url=http://10.20.0.79:4040}
<console>:24: error: not found: value value
def category(min: Int) = { if (0 <= value) "error"}
^
15:11:43,772 DEBUG org.apache.zeppelin.interpreter.Interpreter:197 - key:
spark.ui.enabled, value: true
15:11:43,773 INFO org.apache.zeppelin.spark.SparkInterpreter:979 - Sending
metadata to Zeppelin server: {message=Spark UI enabled,
url=http://10.20.0.79:4040}
defined class Person
15:11:44,112 ERROR org.apache.zeppelin.spark.SparkInterpreter:1256 -
java.lang.NullPointerException
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:784)
```
---
