I believe I got a vague feeling about what is going wrong. So the isc library which now is shared for bind9 and dhcp is compiled (because bind9 is rather wanted that way) with threads enabled. Before that the export version of the library was not. So an isc_app which dhclient creates and runs was more or less a loop handling events. Now this creates a series of threads.
The problem looks to be that dhclient (and probably dhcpd, too) set up the isc_app context and then do a fork() (in daemon mode). The man page of fork() clearly states that the child will be single threaded. So when dhclient calls dispatch() to run the isc_app this probably only runs a single control loop more or less waiting for the threads (which do not run, maybe not even exist anymore) to do the work. The signal handling might be related to that as well. With threads only one of them should handle signals and somehow synchronize with the rest. Maybe the new library is not handling that correctly. Since this does not work regardless of running as daemon or not. But I have not understood all the details there. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to bind9 in Ubuntu. https://bugs.launchpad.net/bugs/1551351 Title: dhclient does not renew leases To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bind9/+bug/1551351/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
