[GitHub] [zeppelin] krishna-pandey opened a new pull request #3623: [ZEPPELIN-4584] Configuration for 404 error page

[GitBox]

krishna-pandey opened a new pull request #3623: [ZEPPELIN-4584] Configuration 
for 404 error page
URL: https://github.com/apache/zeppelin/pull/3623
 
 
   ### What is this PR for?
   Whenever a User encounters a non-existing resource and get a HTTP 404 error 
message, it reveals the Jetty version which can be masked using [ZEPPELIN-2461] 
in response header.
   
   
   ### What type of PR is it?
   [Improvement]
   
   ### Todos
   * Add documentation for configuration
   
   ### What is the Jira issue?
   * [ZEPPELIN-4584](https://issues.apache.org/jira/browse/ZEPPELIN-4584)
   
   ### How should this be tested?
   Try hitting an arbitrary non-existent resource for e.g. 
https://<zeppelin_host>:<zeppelin_port>/<I_D0nt_Exi$t> 
   This should display a generic error page without revealing Server Version.
   
   ### Screenshots (if appropriate)
   Without this PR
   <img width="378" alt="Screenshot 2020-01-30 at 19 05 36" 
src="https://user-images.githubusercontent.com/6433184/73586935-9d400800-44da-11ea-9207-f531539900fb.png";>
   
   With this PR
   <img width="561" alt="Screenshot 2020-02-01 at 10 09 34" 
src="https://user-images.githubusercontent.com/6433184/73586970-117aab80-44db-11ea-9b8b-b67abdcde377.png";>
   
   ### Questions:
   * Does the licenses files need update? No
   * Is there breaking changes for older versions? No
   * Does this needs documentation? Yes
   

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