Github user AhyoungRyu commented on the issue:

    https://github.com/apache/zeppelin/pull/1518
  
    Seems there are some test failures in [ SCALA_VER="2.10" 
SPARK_VER="1.5.2"](https://travis-ci.org/apache/zeppelin/jobs/167607199)
    
    ```
    Results :
    
    Tests in error: 
      InterpreterRestApiTest.init:53->AbstractTestRestApi.startUp:159 » 
NullPointer
      CredentialsRestApiTest.init:46->AbstractTestRestApi.startUp:159 » 
NullPointer
      ZeppelinRestApiTest.init:56->AbstractTestRestApi.startUp:159 » 
NullPointer
      ConfigurationsRestApiTest.init:39->AbstractTestRestApi.startUp:159 » 
NullPointer
      NotebookRestApiTest.init:55->AbstractTestRestApi.startUp:159 » 
NullPointer
      ZeppelinSparkClusterTest.init:49->AbstractTestRestApi.startUp:159 » 
NullPointer
      SecurityRestApiTest.init:44->AbstractTestRestApi.startUp:159 » 
NullPointer
    
    Tests run: 7, Failures: 0, Errors: 7, Skipped: 0
    
    [INFO] 
------------------------------------------------------------------------
    [INFO] Reactor Summary:
    [INFO] 
    [INFO] Zeppelin: Interpreter .............................. SUCCESS [ 
14.139 s]
    [INFO] Zeppelin: Zengine .................................. SUCCESS [  
7.096 s]
    [INFO] Zeppelin: Display system apis ...................... SUCCESS [  
3.527 s]
    [INFO] Zeppelin: Spark dependencies ....................... SUCCESS [ 
42.764 s]
    [INFO] Zeppelin: Spark .................................... SUCCESS [01:52 
min]
    [INFO] Zeppelin: Server ................................... FAILURE [ 
44.231 s]
    [INFO] Zeppelin: R Interpreter ............................ SKIPPED
    [INFO] 
------------------------------------------------------------------------
    [INFO] BUILD FAILURE
    [INFO] 
------------------------------------------------------------------------
    [INFO] Total time: 03:44 min
    [INFO] Finished at: 2016-10-14T15:35:13+00:00
    [INFO] Final Memory: 47M/468M
    [INFO] 
------------------------------------------------------------------------
    [ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-surefire-plugin:2.17:test (default-test) on 
project zeppelin-server: There are test failures.
    [ERROR] 
    [ERROR] Please refer to 
/home/travis/build/apache/zeppelin/zeppelin-server/target/surefire-reports for 
the individual test results.
    [ERROR] -> [Help 1]
    [ERROR] 
    [ERROR] To see the full stack trace of the errors, re-run Maven with the -e 
switch.
    [ERROR] Re-run Maven using the -X switch to enable full debug logging.
    [ERROR] 
    [ERROR] For more information about the errors and possible solutions, 
please read the following articles:
    [ERROR] [Help 1] 
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
    [ERROR] 
    [ERROR] After correcting the problems, you can resume the build with the 
command
    [ERROR]   mvn <goals> -rf :zeppelin-server
    
    ```
    
    I think they are related with this change.. 


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