We have migrated from Hudson to Jenkins. We decided to create a new buildmaster, since we also faced some issue with the old master.
On the new master we defined only 1 JDK.
All builds try to install the new JDK (1.6.23) and on a number of systems (windows) this gave an issue.
The JDK gets installed in ../tools/1.6.23, but the public JRE get installed in C:\Program Files\Java\jre6
That influences already installed Java installation(s).
On a number of machine we had to remove all Java installation and do a manual installation again to get it back up and running.
For windows the public JRE has to be skipped I think.
That can be done with the following command: ADDLOCAL="ToolsFeature,DemosFeature,SourceFeature"
Or the install directory of the public JRE has to be defined as well: /INSTALLDIRPUBJRE=...
That is not done right now.
This issue is very frustrating and causing a lot of issue and loss of time.