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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-6607) Add different variants of non caching HTTP headers
Date Wed, 14 Nov 2012 22:18:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497531#comment-13497531

Hadoop QA commented on HADOOP-6607:

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1747//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1747//console

This message is automatically generated.
> Add different variants of non caching HTTP headers
> --------------------------------------------------
>                 Key: HADOOP-6607
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6607
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.22.0
>            Reporter: Steve Loughran
>            Assignee: Alejandro Abdelnur
>            Priority: Minor
>             Fix For: 2.0.3-alpha
>         Attachments: HADOOP-6607.patch, HADOOP-6607.patch, NoCachingFilter.java
> I'm suffering from proxy servers that are caching some of the HttpResponses that Hadoop
generates in servlets/JSP pages. While the web ui is up to date, some of my build files are
failing to pull stuff down because that is going via proxy -it sees an error page rather than
the data
> # Every servlet should set a short expires header and disable caching, especially in
> # JSP pages should do it to
> # It's essential that error responses do it.
> Maybe this could be done in a filter. Otherwise something like
> {code}
>     /**
>      * Turn off caching and say that the response expires now
>      * @param response the response
>      */
>     protected void disableCaching(HttpServletResponse response) {
>         response.addDateHeader("Expires", System.currentTimeMillis());
>         response.addHeader("Cache-Control", "no-cache");
>         response.addHeader("Pragma", "no-cache");
>     }
> {code}
> Before anyone rushes to do this, we should consult some HTTP experts in Yahoo! or Facebook
to get the options right. It may be best to have, say, a 1s lifespan on everything.

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