Hello,

from time to time our Jenkins gets stuck: The GUI remains responsive, but no more builds are done.
The stack trace shows it hangs at a WeakHashMap.get() in the class InstallerTranslator.

This is a risky method, since it is not properly synchronized and can easily lead to an endless rehashing loop:

https://www.google.de/#q=WeakHashMap+get+endless

As we heavily rely on our Jenkins in a production system, we strongly suggest that you try to find some other, well synchronized way.