Hoon Park created ZEPPELIN-1827:
-----------------------------------

             Summary: Flaky Test: ZeppelinIT.testAngularDisplay (myVar=3)
                 Key: ZEPPELIN-1827
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-1827
             Project: Zeppelin
          Issue Type: Bug
            Reporter: Hoon Park


I saw this error multiple times.

- raw log1: 
https://s3.amazonaws.com/archive.travis-ci.org/jobs/184145237/log.txt
- build profile1: https://travis-ci.org/apache/zeppelin/jobs/184145237/config
- Also in a PR comment 
https://github.com/apache/zeppelin/pull/1688#issuecomment-264378060

{code}
5:13:46,289 ERROR org.apache.zeppelin.AbstractZeppelinIT:136 - Exception in 
ZeppelinIT while testAngularDisplay 
org.openqa.selenium.StaleElementReferenceException: Element not found in the 
cache - perhaps the page has changed since it was looked up
Command duration or timeout: 30.05 seconds
For documentation on this error, please visit: 
http://seleniumhq.org/exceptions/stale_element_reference.html
Build info: version: '2.48.2', revision: 
'41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
System info: host: 'testing-docker-44f30cc6-7d42-4680-bea6-3b04f484c151', ip: 
'172.17.0.7', os.name: 'Linux', os.arch: 'amd64', os.version: 
'4.8.12-040812-generic', java.version: '1.7.0_76'
Session ID: 1d4fa764-6da8-4b0a-9250-040c20362a4f
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.getText(RemoteWebElement.java:178)
        at 
org.apache.zeppelin.AbstractZeppelinIT.waitForText(AbstractZeppelinIT.java:84)
        at 
org.apache.zeppelin.integration.ZeppelinIT.testAngularDisplay(ZeppelinIT.java:157)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.rules.Verifier$1.evaluate(Verifier.java:35)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
        at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
        at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
        at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
        at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
        at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
Caused by: org.openqa.selenium.StaleElementReferenceException: Element not 
found in the cache - perhaps the page has changed since it was looked up
For documentation on this error, please visit: 
http://seleniumhq.org/exceptions/stale_element_reference.html
Build info: version: '2.48.2', revision: 
'41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
{code}

the test code looks like 

{code}

// ZeppelinIT.testAngularDisplay()

      // check expected text by watcher
      waitForText("myVar=3", By.xpath(
              getParagraphXPath(3) + "//div[contains(@id,\"_text\") and 
@class=\"text\"]"));
{code}



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