During our Cockpit integration tests on Ubuntu 16.04, nsupdate crashes awfully often when joining a FreeIPA domain, like this:
Jun 25 13:17:26 x0.cockpit.lan systemd-coredump[8503]: Process 8498 (nsupdate) of user 0 dumped core.
Stack trace of thread 8501:
#0 0x00007f3c32c87428 __GI_raise (libc.so.6)
#1 0x00007f3c32c8902a __GI_abort (libc.so.6)
#2 0x00007f3c3302ee7f isc_assertion_failed (libisc.so.160)
#3 0x00007f3c33a13895 dns_name_clone (libdns.so.162)
#4 0x0000557a33fee6be n/a (nsupdate)
#5 0x0000557a33ff019b n/a (nsupdate)
#6 0x0000557a33ff16d2 n/a (nsupdate)
#7 0x00007f3c33053360 n/a (libisc.so.160)
#8 0x00007f3c32a3c6ba start_thread (libpthread.so.0)
#9 0x00007f3c32d5941d __clone (libc.so.6)
Stack trace of thread 8498:
#0 0x00007f3c32c87826 __GI___sigsuspend (libc.so.6)
#1 0x00007f3c3305b8c9 isc__app_ctxrun (libisc.so.160)
#2 0x00007f3c3305c37b isc_app_run (libisc.so.160)
#3 0x0000557a33fec97f n/a (nsupdate)
#4 0x00007f3c32c72830 __libc_start_main (libc.so.6)
#5 0x0000557a33feccb9 n/a (nsupdate)
Stack trace of thread 8499:
#0 0x00007f3c32d59a13 epoll_wait (libc.so.6)
#1 0x00007f3c33065bae n/a (libisc.so.160)
#2 0x00007f3c32a3c6ba start_thread (libpthread.so.0)
#3 0x00007f3c32d5941d __clone (libc.so.6)
Stack trace of thread 8500:
#0 0x00007f3c32a42360 pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
#1 0x00007f3c3305873a n/a (libisc.so.160)
#2 0x00007f3c32a3c6ba start_thread (libpthread.so.0)
#3 0x00007f3c32d5941d __clone (libc.so.6)
This seems to match this error report: https://errors.ubuntu.com/problem/529d4b079f3b5f58071002a7639110edc593f56a
I cannot access that URL, but the stack trace in https://errors.ubuntu.com/?release=Ubuntu%2016.04&package=bind9&period=month is a fairly good match.
