question Unable to open Resource Manger UI after Kerberezing the cluster in Support Questions

Unable to open Resource Manger UI after Kerberezing the cluster

bvishal — Wed, 03 Mar 2021 06:55:50 GMT

Ambari : 2.7.4

HDP : 3.1.4.0-315

Hi everyone,

Recently after kerberizing my cluster, I am unable to access my Resource Manager UI. Whenever I hit on the resource manager link on Ambari, it shows up the following error :

Please help me out to resolve this issue as soon as possible.

@KuldeepK @Shelton @jsensharma

Re: Unable to open Resource Manger UI after Kerberezing the cluster

bvishal — Wed, 03 Mar 2021 07:48:45 GMT

HTTP ERROR 401
Problem accessing /ui2/. Reason:
Unauthorized access

Re: Unable to open Resource Manger UI after Kerberezing the cluster

Scharan — Mon, 08 Mar 2021 05:08:38 GMT

In HDP 3.x Spenego authentication will be enabled by default when you enable Kerberos

To access the UI you need to either configure Spnego auth in the browser OR disable spnego auth by setting the below properties in Hdfs =>Advanced core-site

hadoop.http.authentication.simple.anonymous.allowed = true hadoop.http.authentication.type = simple

Re: Unable to open Resource Manger UI after Kerberezing the cluster

bvishal — Mon, 08 Mar 2021 05:32:53 GMT

@Scharan thanks a lot for replying.

The solution you suggested worked! But I just wanted to know whether modifying those two properties as you mentioned will cause any decrease in the security of my HDFS or cluster anyway?

Re: Unable to open Resource Manger UI after Kerberezing the cluster

Scharan — Mon, 08 Mar 2021 05:33:09 GMT

@bvishal given properties will disable authentication for webui's and it will allow anonymous users to access the web UI's of hdfs, yarn, and mapreduce.