Lee moon soo created ZEPPELIN-476:
-------------------------------------

             Summary: Flickering test
                 Key: ZEPPELIN-476
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-476
             Project: Zeppelin
          Issue Type: Bug
            Reporter: Lee moon soo


There're flickering test and log message is looks like

{code}

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 4.099 sec <<< 
FAILURE! - in org.apache.zeppelin.rest.ZeppelinRestApiTest
org.apache.zeppelin.rest.ZeppelinRestApiTest  Time elapsed: 4.099 sec  <<< 
ERROR!
java.lang.NullPointerException: null
        at java.util.Hashtable.put(Hashtable.java:514)
        at java.util.Properties.setProperty(Properties.java:161)
        at 
org.apache.zeppelin.rest.AbstractTestRestApi.startUp(AbstractTestRestApi.java:126)
        at 
org.apache.zeppelin.rest.ZeppelinRestApiTest.init(ZeppelinRestApiTest.java:58)

09:08:10,815  INFO org.apache.zeppelin.server.ZeppelinServer:112 - Shutting 
down Zeppelin Server ... 
09:08:10,816  INFO org.apache.zeppelin.server.ZeppelinServer:112 - Shutting 
down Zeppelin Server ... 
09:08:10,882  INFO org.apache.zeppelin.server.ZeppelinServer:119 - Bye
09:08:10,892  INFO org.apache.zeppelin.server.ZeppelinServer:119 - Bye

Results :

Tests in error: 
  ZeppelinSparkClusterTest.init:48->AbstractTestRestApi.startUp:126 » 
NullPointer
  ZeppelinRestApiTest.init:58->AbstractTestRestApi.startUp:126 » NullPointer

Tests run: 2, Failures: 0, Errors: 2, Skipped: 0
{code}



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