Failing tests in build on master

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 T E S T S
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Running org.apache.zeppelin.ZeppelinIT
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 33.119 sec <<< FAILURE! - in org.apache.zeppelin.ZeppelinIT
testAngularDisplay(org.apache.zeppelin.ZeppelinIT)  Time elapsed: 32.941 sec  <<< ERROR!
org.openqa.selenium.ElementNotVisibleException: Element is not currently visible and so may not be interacted with
Command duration or timeout: 8 milliseconds
Build info: version: '2.48.2', revision: '41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
System info: host: 'testing-worker-linux-docker-14dcbbed-3369-linux-14', ip: '172.17.36.242', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-40-generic', java.version: '1.7.0_76'
Session ID: 422b8f52-ab3b-4e7c-87c3-65cdcd01a8e4
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{platform=LINUX, acceptSslCerts=true, javascriptEnabled=true, cssSelectorsEnabled=true, databaseEnabled=true, browserName=firefox, handlesAlerts=true, nativeEvents=false, webStorageEnabled=true, rotatable=false, locationContextEnabled=true, applicationCacheEnabled=true, takesScreenshot=true, version=31.0}]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
	at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:647)
	at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:326)
	at org.openqa.selenium.remote.RemoteWebElement.sendKeys(RemoteWebElement.java:121)
	at org.apache.zeppelin.ZeppelinIT.testAngularDisplay(ZeppelinIT.java:240)
Caused by: org.openqa.selenium.ElementNotVisibleException: Element is not currently visible and so may not be interacted with
Build info: version: '2.48.2', revision: '41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
System info: host: 'testing-worker-linux-docker-14dcbbed-3369-linux-14', ip: '172.17.36.242', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-40-generic', java.version: '1.7.0_76'
Driver info: driver.version: unknown
	at <anonymous class&gt;.fxdriver.preconditions.visible(file:///tmp/anonymous6524883807753346655webdriver-profile/extensions/fxdriver@googlecode.com/components/command-processor.js:9981)
	at <anonymous class&gt;.DelayedCommand.prototype.checkPreconditions_(file:///tmp/anonymous6524883807753346655webdriver-profile/extensions/fxdriver@googlecode.com/components/command-processor.js:12517)
	at <anonymous class&gt;.DelayedCommand.prototype.executeInternal_/h(file:///tmp/anonymous6524883807753346655webdriver-profile/extensions/fxdriver@googlecode.com/components/command-processor.js:12534)
	at <anonymous class&gt;.DelayedCommand.prototype.executeInternal_(file:///tmp/anonymous6524883807753346655webdriver-profile/extensions/fxdriver@googlecode.com/components/command-processor.js:12539)
	at <anonymous class&gt;.DelayedCommand.prototype.execute/<(file:///tmp/anonymous6524883807753346655webdriver-profile/extensions/fxdriver@googlecode.com/components/command-processor.js:12481)


Results :

Tests in error: 
  ZeppelinIT.testAngularDisplay:240 » ElementNotVisible Element is not currently...

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0
...
[INFO] Zeppelin: web Application .......................... SUCCESS [ 38.827 s]
[INFO] Zeppelin: Server ................................... FAILURE [02:29 min]
[INFO] Zeppelin: Packaging distribution ................... SKIPPED
[INFO] ------------------------------------------------------------------------