Hello List, recently, I've moved /apps to its own device. This invalidates NFS handles on the nodes, of course, so I started to reboot them. To my surprise, they don't come up again. The nodes complain about a time-out, "Failed to request QluMan node config in time", and ask me to check qlumand and qluman-route on the head. These two processes are indeed running. I've checked the logs, but couldn't fine anything helpful (to me) in there. qlumand seems to see the node briefly: 2019-03-05 11:45:06,615 [29219] INFO server.admin - Identifying node from '00-25-90-d9-08-86' 2019-03-05 11:45:06,617 [29219] INFO server.admin - Registering Execd 'node31-35' 2019-03-05 11:45:39,645 [29219] INFO server.admin - Execd '00-25-90-d9-08-86' disconnected I've attached the router log. There's one thing that's conspicuous, but it doesn't seem to be correlated with the nodes booting: a stack trace when accessing the database. I'll be grateful for any pointers. Thanks, A. -- Ansgar Esztermann Sysadmin Dep. Theoretical and Computational Biophysics http://www.mpibpc.mpg.de/grubmueller/esztermann