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https://issues.apache.org/jira/browse/HADOOP-8998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497102#comment-13497102
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Steve Loughran commented on HADOOP-8998:
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I missed this because the cycle time happened entirely while I was asleep,
which is suboptimal for global development.
I would have -1'd it for two reasons
# switching to import.* -please set your IDE up not to do this
# failing to set enough no-cache headers to be confident that it works
everywhere
I listed in HADOOP-6607 all the headers that were needed to do this, and
pragma:no-cache is the HTTP 1.0 equivalent.
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.32
> set Cache-Control no-cache header on all dynamic content
> --------------------------------------------------------
>
> Key: HADOOP-8998
> URL: https://issues.apache.org/jira/browse/HADOOP-8998
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.0.2-alpha
> Reporter: Andy Isaacson
> Assignee: Alejandro Abdelnur
> Priority: Minor
> Fix For: 2.0.3-alpha
>
> Attachments: HADOOP-8998.patch, HADOOP-8998.patch
>
>
> 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:
> {noformat}
> % 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)
> {noformat}
> 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.
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