We use following directory structure:

.

where ./jenkins was the path where jenkins was started by
"java -jar jenkins.war .....".

and jenkins/jenkins was our jenkins home directory (JENKINS_HOME).

Until 1.534 the war archive was extracted to "./jenkins/jenkins/war" (=$JENKINS_HOME/war).

Version 1.535 extracts to ./jenkins/jenkins which causes a removal of our whole jenkins home directory (thanks god we have a backup) replaced by the war archive content.

Is there possibility to protect jenkins home directory against being the war extraction directory ?

Our environment may be a little strange and we'll change it, but it was terrible, when a working environment was destroyed just by updating to a new version.

I renamed the jenkins home directory ./jenkins/jenkins to ./jenkins/something and use it as JENKINS_HOME, and now the war archive was extracted again to $JENKINS_HOME/war as it was in earlier versions.

Strange !