[YARN-3148] Allow CORS related headers to passthrough in WebAppProxyServlet

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Varun Saxena
• Reporter: Prakash Ramachandran
• Created: 05/Feb/15 18:13
• Updated: 30/Aug/16 01:27
• Resolved: 17/Jun/15 10:30

Description

currently the WebAppProxyServlet filters the request headers as defined by passThroughHeaders. Tez UI is building a webapp which using rest api to fetch data from the am via the rm tracking url.

for this purpose it would be nice to have additional headers allowed especially the ones related to CORS. A few of them that would help are

• Origin
• Access-Control-Request-Method
• Access-Control-Request-Headers