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https://issues.apache.org/jira/browse/HADOOP-3878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12670540#action_12670540
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Steve Loughran commented on HADOOP-3878:
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The test for this would be with httpclient or htmlunit -fetch the page, look 
for the headers.

> JSP pages don't disable caching
> -------------------------------
>
>                 Key: HADOOP-3878
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3878
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.19.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> None of the JSP pages disable caching. This is bad for long-haul diagnostics, 
> as proxy servers may cache the content. Even if the remote cluster is down, 
> the proxy may return the last-good status page showing all is well.

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