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https://issues.apache.org/jira/browse/KYLIN-2589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15999393#comment-15999393
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Young Wu commented on KYLIN-2589:
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The issue is inevitably happened right after I manually reload metadata in
Kylin WebUI. So I suspect this issue is related to metadata and there's a
mechanism in Kylin to fresh metadata timely. That's why this issue happens some
time after Kylin starts but not immediately.
> Errors in WebUI Authentication
> ------------------------------
>
> Key: KYLIN-2589
> URL: https://issues.apache.org/jira/browse/KYLIN-2589
> Project: Kylin
> Issue Type: Bug
> Components: General
> Affects Versions: v2.0.0
> Environment: EMR
> Reporter: Young Wu
> Attachments: 2921494001551_.pic_hd.jpg, Screenshot 2017-05-06
> 12.29.34.png
>
>
> There seems bugs exist in the webserver's authentication part in kylin. After
> kylin run several hours, user will failed login with username/password. The
> error reported in the log is "Encoded password cannot be null or empty".
> Detailed attached behind. The only solution is restart kylin timely. Restart
> can suppress this issue several hours and then suddenly error comes back
> again. ISSUE detail is also here:
> http://apache-kylin.74782.x6.nabble.com/Re-Encoded-password-cannot-be-null-or-empty-when-login-into-kylin-s-web-UI-td7879.html#a7887
> It is not due to upgrade from 2.0.0-BETA to 2.0.0 since I've already cleaned
> up all the info in hbase and spun up a brand new kylin-2.0.0, but the issue
> is still there.
> Another bug occurs seldom, but it looks like also relates to authentication.
> It happens when kylin is having a heavy load of query requests. Details also
> attached.
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