[jira] [Created] (KYLIN-3565) User cannot login Kylin when HBase metadata server down

["Marc Wu (JIRA)" <ji...@apache.org>]

Marc Wu created KYLIN-3565:
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             Summary: User cannot login Kylin when HBase metadata server down
                 Key: KYLIN-3565
                 URL: https://issues.apache.org/jira/browse/KYLIN-3565
             Project: Kylin
          Issue Type: Bug
          Components: REST Service, Web 
    Affects Versions: v2.4.1
         Environment: CentOS 6.7, HBase 1.2.0+cdh5.14.2+456
            Reporter: Marc Wu
             Fix For: Future
         Attachments: 2018-09-17_16-56-12.png, 2018-09-17_16-56-38.png, 2018-09-17_16-59-31.png, image-2018-09-17-20-22-20-294.png, image-2018-09-17-20-25-54-896.png

Hi Kylin team,

 

We found one issue when log in Kylin. The error message will misunderstood user.

 

I couldn't log in Kylin even I input correct username & password (enable LDAP).

So I checked the log on server, it showed me that there exist HBase connection issues.

Root cause is that the HBase server which Kylin used as metadata server is down, but the login message showed me that I should check my username or password. It's really confusing.

Then I read some source codes about login module, and found out Kylin shares the same error message for different cases.

 

We suggested two options:
 # redirect to global error page when HBase connection fail after login, shows error message(e.g. System Error, please contact system administrator).
 # enhance the error code for login logic, make the error message more specific.

 

There are login error message and the log. And I log in successfully after recover HBase servers.

!image-2018-09-17-20-25-54-896.png!!image-2018-09-17-20-22-20-294.png!



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