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Bug
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Resolution: Won't Fix
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Major
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Internet Explorer
TL;DR: Make the 404 redirect page longer so IE behaves, or change how redirects work.
Let's say you have a build with no test reports (eg, a cancelled build). Try to enter the testReport page:
http://jenkins:8080/job/MyProject/1325/testReport/
Jenkins will perform a 302 Found redirect to
http://jenkins:8080/job/MyProject/1325/testReport/?
This will load a 404 page with the following contents:
<html><head><meta http-equiv='refresh' content='1;url=..'/><script>window.location.replace('..');</script></head><body style='background-color:white; color:white;'>Not found</body></html>
On Chrome and Firefox this will redirect to http://jenkins:8080/job/MyProject/1325 which is probably what you expected. IE will not. It will instead redirect to its own internal 404 page.
I think this page purports to tell why this happens. It says that the page needs to be 512 bytes or it's ignored:
http://www.404-error-page.com/404-error-page-too-short-problem-microsoft-ie.shtml
The upshot is that it would be good if either both redirects used a 302 Found, or perhaps a simpler solution would be if the 404 meta-redirect had more content so that Explorer took it seriously.
[JENKINS-13540] Redirects do not work properly on IE
Internet Explorer 8 is no longer supported by Jenkins, so resolving as Won't Fix. If this issue occurs on more recent versions of Internet Explorer, please file a new issue.
https://wiki.jenkins-ci.org/display/JENKINS/Browser+Compatibility+Matrix
Reproduced with Jenkins 1.511 and IE8.
And so the "Previous build" and "Next build" links in test reports may go to an error 404 page.