Troubles with BIND + r276630 (/r277317 MFC)

Matthew D. Fuller fullermd at
Thu Feb 12 22:59:12 UTC 2015

I've been setting up a stable/10 system (currently r278451, ~early
this week), and had some disturbing troubles out of BIND (net/bind910,
but also tested bind99).  Sporadically, on restart, I get errors like

Feb 12 10:42:37 dns named[4071]: dns_master_load: /usr/local/etc/namedb/master/empty.db:1: isc_lex_gettoken() failed: I/O error
Feb 12 10:42:37 dns named[4071]: dns_master_load: /usr/local/etc/namedb/master/empty.db:1: I/O error
Feb 12 10:42:37 dns named[4071]: zone loading from master file /usr/local/etc/namedb/master/empty.db failed: I/O error
Feb 12 10:42:37 dns named[4071]: zone not loaded due to errors.

and similar.  Nothing wrong with the files, and it's wildly
inconsistent.  Easy to reproduce; just hammering 'service named
restart' while tail -f'ing the messages log will show some startups
going problem-free, while others will get random errors in random
files.  I can also reproduce it on my -CURRENT workstation (r278359,
~late last week), but not on several stable/10 systems of late-Dec

In some testing on the -CURRENT box, if I build libc/libthr as of
r276629 and do LD_LIBRARY_PATH hackery (and obviously not the
'service' wrapper) to use them, I can kick the reload without ever
getting troubles (tried at least a hundred times).  Going to 276630,
or using the system libs, it'll happen sporadically (maybe once a
dozen or so on average?).

So far, I haven't seen anything odd in anything but BIND.  I was
running a mid-Jan -CURRENT before this for a couple weeks too, so
there should have been time for Firefox to throw a hissy fit or
something, but no hint of trouble.  So it's not clear whether the
problem is in the libc/libthr changes or in BIND 9.9 and 9.10, but
certainly something between the two is unhappy...

Matthew Fuller     (MF4839)   |  fullermd at
Systems/Network Administrator |
           On the Internet, nobody can hear you scream.

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