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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