Flaky Test - ParagraphActionsIT.testTitleButton

Tests run: 9, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 252.972 sec <<< FAILURE! - in org.apache.zeppelin.integration.ParagraphActionsIT
testTitleButton(org.apache.zeppelin.integration.ParagraphActionsIT)  Time elapsed: 43.103 sec  <<< ERROR!
org.openqa.selenium.NoSuchElementException: Unable to locate element: {"method":"xpath","selector":"(//div[@ng-controller=\"ParagraphCtrl\"])[1]//div[contains(@class, 'title')]/div"}
Command duration or timeout: 30.12 seconds
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
Build info: version: '2.48.2', revision: '41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
System info: host: 'testing-docker-c1ef03c7-a6c5-49b9-96d2-4b19398a24f5', ip: '172.17.0.13', os.name: 'Linux', os.arch: 'amd64', os.version: '4.8.12-040812-generic', java.version: '1.7.0_76'
*** Element info: {Using=xpath, value=(//div[@ng-controller="ParagraphCtrl"])[1]//div[contains(@class, 'title')]/div}
Session ID: a6497077-f91b-4d7e-b5fb-cd37835c3070
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.RemoteWebDriver.findElement(RemoteWebDriver.java:353)
	at org.openqa.selenium.remote.RemoteWebDriver.findElementByXPath(RemoteWebDriver.java:490)
	at org.openqa.selenium.By$ByXPath.findElement(By.java:361)
	at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:345)
	at org.apache.zeppelin.integration.ParagraphActionsIT.testTitleButton(ParagraphActionsIT.java:380)
Caused by: org.openqa.selenium.NoSuchElementException: Unable to locate element: {"method":"xpath","selector":"(//div[@ng-controller=\"ParagraphCtrl\"])[1]//div[contains(@class, 'title')]/div"}
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
Build info: version: '2.48.2', revision: '41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
System info: host: 'testing-docker-c1ef03c7-a6c5-49b9-96d2-4b19398a24f5', ip: '172.17.0.13', os.name: 'Linux', os.arch: 'amd64', os.version: '4.8.12-040812-generic', java.version: '1.7.0_76'
Driver info: driver.version: unknown
	at <anonymous class&gt;.FirefoxDriver.prototype.findElementInternal_(file:///tmp/anonymous1060715853844943151webdriver-profile/extensions/fxdriver@googlecode.com/components/driver-component.js:10659)
	at <anonymous class&gt;.fxdriver.Timer.prototype.setTimeout/<.notify(file:///tmp/anonymous1060715853844943151webdriver-profile/extensions/fxdriver@googlecode.com/components/driver-component.js:621)