Comment # 30 on bug 1160995 from GCC Da DiscoveryTechnologies

(In reply to Thorsten Kukuk from comment #29)
> No idea, but if you use host names in yp.conf, make sure that
> /etc/nsswitch.conf is not using NIS for hosts, services, rpc.
> The later is a very good idea in any case.

No NIS at all or in a later order? I have

# grep hosts /etc/nsswitch.conf
hosts:          files nis mdns4_minimal [NOTFOUND=return] dns

All NIS servers are defined in /etc/hosts , so they should be resolved from
there.

Services is "files nis" and rpc only 'files'.

> Leap 42.* was using sunrpc while Leap 15* is using ti-rpc. There are big
> differences in this implementations.

This can be a possible explanation for the recent appearance of the problem.
(But does not explain to me why it only happens to some users.)