there is a problem there (ATRP$TRA.getResult() returns "this" and ATRA.findCorrespondingResult tries to cast it to TestResult.. which it is not), but I'm not familiar enough with this part of the code to know the right fix.. I wonder if it should just catch the type mismatch and return null.

I also see the same issue. When I navigate to hudson -> Project -> Build -> Latest Test Result -> History, the chart that's supposed to be there shows a "broken image" icon, and I see the same ClassCastException in the logs.

Hi Arve and arhawth,
Is this still an issue with a recent Jenkins version?
Thanks

Just updated to 1.440 and it still present. Error here
I got this exception on page http://server.name:8080/job/JobName/lastCompletedBuild/testReport/history/countGraph/png?start=0&end=25 Feel free to ask anything else

# java -version
java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.8) (6b20-1.9.8-0ubuntu1~10.04.1)
OpenJDK Client VM (build 19.0-b09, mixed mode, sharing)

# uname -a
Linux li354-11 2.6.39.1-linode34 #1 SMP Tue Jun 21 10:29:24 EDT 2011 i686 GNU/Linux

Installed and updated with "apt-get install jenkins"

I just try to run jenkins on same server from WAR file without additional plugins with new build task and bug gone. I'll try to reproduce it on clean setup.

Seems like running from WAR file fixes my first jenkins setup as well. Bug is gone and i can't reproduce it at all.

Ah, no. It appears again after i run build on the old setup. Magic... Ok, later I'll try to figure out how to reproduce it.

Seems like it caused by one (or many) of old builds in .jenkins/jobs/JobName/builds/ dir. I'll try to find which one.

I'm still seeing broken graphs with this error on my jenkins install (jenkins lts 1.447.1 running on debian squeeze).
Some jobs (with the same config except they are using different git branches) are fine others borked.