Can't Access the Nifi UI

[#1]

Hi, I have some issue after I use ambari install nifi.

I set up the SSL in Ambari Nifi configs. the nifi status is ok, but I can't access the Nifi UI

the nifi-applog and bootstrap log also seems ok.

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Hope someone can help me out... doing something wrong :).

Kind regards,

Ray

[#2]

Trying to give closure to this topic:

This is a very misleading situation where it seems Nifi is not running but it actually is. And you get ERR_CONNECTION_CLOSED or 'can't display page' etc. error when you try to hit the secure url.

Reason: Nifi is configured to authenticate client for connection and since there is not authentication provided the UI errors out.

Resolution: Import client certificate in your browser. This certificate needs to be trusted by the same authority as Nifi.

Once imported, close and re-open the browser (refreshing will not work). Given you have imported the certificates, you should be prompted to select a certificate to login.

[#3]

This issue is not limited to IE. A similar issue with cached credentials/session may occur in Chrome. Restarting Chrome resolves the issue as well. To restart Chrome without losing current tabs, type chrome://restart in a new tab.