On 03/09/16, Rostislav Pehlivanov wrote: > Upgrading to the latest libnss3 (3.23) fixes the problem.
libnss3 is crypto library by mozilla, it is not related anyhow to name resolution and glibc nss subsystem, it is not used by systemd, and very unlikely to affect this bug anyhow. So, if this problem was fixed, it was something else.
P.S. if problem will reappear, to debug daemons that cannot be launched from gdb, you can either attach to them in gdb alive (gdb /path/to/daemon `pidof daemon`) or enable coredumps (take a look at systemd-coredump) and do post-mortem examination (gdb /path/to/daemon /path/to/core).