Hello, 
I'm trying to acces Spark History UI through Apache Knox proxy but I get this 
error the following error: 

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the 
remote resource at [ 
https://ithdpdev-ekleszcz01.cern.ch:18080/api/v1/applications?limit=2147483647&status=completed
 | 
https://<spark-host>:18080/api/v1/applications?limit=2147483647&status=completed
 ] . (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 
302. 

I can' t find something related to CORS in Spark do you know how I could fix 
that ? 
Someone suggested the following parameters but it didn't work and I can't 
manage to find any reference to those online: 



spark.hadoop.http.cross-origin.allowed-origins = * 

spark.hadoop.http.cross-origin.allowed-methods = GET, PUT, POST, OPTIONS, HEAD, 
DELETE 

spark.hadoop.http.cross-origin.allowed-headers = X-Requested-With, 
Content-Type, Accept, Origin, WWW-Authenticate, Accept-Encoding, 
Transfer-Encoding 

spark.hadoop.http.cross-origin.max-age = 180 
Thanks for your answer 

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