> We'll likely go with this solution instead of downgrading Python and the
> related libraries.
In fact I came up with another solution. I realized that since the problem was
related to the process signal mask, instead of called ntpd directly, wrap it up
in a C app that resets the signal mask to something that works. I have the
following code:
sigset_t set, oset;
sigemptyset(&set);
pthread_sigmask(SIG_SETMASK, &set, &oset);
system("/usr/sbin/ntpd -g -q");
pthread_sigmask(SIG_SETMASK, &oset, NULL);
I wrapped this up into a standalone app and call this from Python instead of
calling ntpd directly. This solved the problem--no more hang. Thanks very much
to Kostik Belousov for his "wild guess" that this was related to the process
signal mask. His guess was dead on.
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