[HADOOP-8998] set Cache-Control no-cache header on all dynamic content

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.2-alpha
• Fix Version/s: 2.0.3-alpha
• Hadoop Flags: Reviewed
• Assignee: Alejandro Abdelnur
• Reporter: Andy Isaacson
• Created: 11/Oct/12 19:39
• Updated: 18/Jul/14 20:01
• Resolved: 14/Nov/12 06:23

Description

We should send a Cache-Control header on JSP pages so that HTTP/1.1 compliant caches can properly manage cached data.

Currently our JSPs send:

% curl -v http://nn1:50070/dfshealth.jsp
...
< HTTP/1.1 200 OK
< Content-Type: text/html; charset=utf-8
< Expires: Thu, 01-Jan-1970 00:00:00 GMT
< Set-Cookie: JSESSIONID=xtblchjm7o7j1y1f33r0mpmqp;Path=/
< Content-Length: 3651
< Server: Jetty(6.1.26)

Based on a quick reading of RFC 2616 http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html I think we want to send Cache-Control: private, no-cache but I could be wrong. The Jetty docs http://docs.codehaus.org/display/JETTY/LastModifiedCacheControl indicate this is fairly straightforward.

Issue Links

• duplicates: HDFS-91 JSP pages don't disable caching
• relates to: HADOOP-6607 Add different variants of non caching HTTP headers