Github user AhyoungRyu commented on the issue:
https://github.com/apache/zeppelin/pull/1821
@cloverhearts Thanks for quick fixing and improvement. I think it's my
bad.. Let me test this!
But Selenium test failure looks relevant with this change like below. Could
you take a look?
```
Results :
Tests in error:
AuthenticationIT.testGroupPermission:192->AbstractZeppelinIT.pollingWait:96
û Timeout
Tests run: 18, Failures: 0, Errors: 1, Skipped: 0
```
This is the screenshot taken when the error occurs

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