This has happened a couple of times before. Hudson just seems to crash without any comprehensible evidence in the log. There is a backtrace and mem-map, but I am not a developer so I don't quite understand exactly what is going on. I am hoping you have some ideas.

I see some references to libpam-ldap.so. We are not using LDAP directly in Hudson, but authenticating via the Unix user database. Ubuntu then does the LDAP auth. All this is working flawless, and the crashes seem very random. There are not many people logging in and out of Hudson. Users are me + six developers.

There is the Master server and four slaves. The slaves can build maximum two jobs each simultaneously. They are all using Ubuntu + one Fedora, and have about the same specs. Everything connected through Dell enterprise class switches with gigabit copper.

Let me know if you need more information. List of installed plugins (all latest version as of Hudson 1.359) and the last 5000 lines from three logs attached.