[hobbit] Two DNS lookups for a server but one fails

Fri Jan 9 12:48:02 CET 2009

OK, I found a core file and have gleaned the following (I removed the symbol load messages):

Core was generated by `bbtest-net --report --ping --checkresponse --no-ares'.
Program terminated with signal 6, Aborted.
#0  0xfec64a27 in _lwp_kill () from /lib/libc.so.1
(gdb) bt
#0  0xfec64a27 in _lwp_kill () from /lib/libc.so.1
#1  0xfec621d4 in thr_kill () from /lib/libc.so.1
#2  0xfec111c7 in raise () from /lib/libc.so.1
#3  0xfebf15d9 in abort () from /lib/libc.so.1
#4  0x0806cbea in sigsegv_handler (signum=11) at sig.c:52
#5  0xfec63def in __sighndlr () from /lib/libc.so.1
#6  0xfec5a292 in call_user_handler () from /lib/libc.so.1
#7  <signal handler called>
#8  0x0806db51 in strbuf_addtobuffer (buf=0x10,
    newtext=0x8106960 "@\f\a\bÀX\022\b\b", newlen=135419976) at strfunc.c:100
#9  0x08061783 in dns_detail_callback (arg=0x812ee90, status=16, abuf=0x0,
    alen=0) at dns2.c:215
#10 0x08070ba0 in end_squery (squery=0x81258c0, status=134700378, abuf=0x0,
    alen=0) at ares_search.c:185
#11 0x08070c6f in search_callback (arg=0x81258c0, status=134700378, abuf=0x0,
    alen=0) at ares_search.c:179
#12 0x08072fac in qcallback (arg=0x8106960, status=16, abuf=0x0, alen=0)
    at ares_query.c:110
#13 0x080728b4 in ares_destroy (channel=0x8125848) at ares_destroy.c:40
#14 0x08060ff3 in dns_test_server (serverip=0x0,
    hostname=0x810781c "a:mx.colt.net,ns:mx.colt.net", banner=0x8106f60)
    at dns.c:362
#15 0x08057bf7 in run_nslookup_service (service=0x0) at bbtest-net.c:970
---Type <return> to continue, or q <return> to quit---
#16 0x0805abf9 in main (argc=5, argv=0x804675c) at bbtest-net.c:2218
(gdb) 

|\/|artin

> -----Original Message-----
> From: Ward, Martin [mailto:Martin.Ward at colt.net] 
> Sent: 09 January 2009 10:35
> To: hobbit at hswn.dk
> Subject: RE: [hobbit] Two DNS lookups for a server but one fails
> 
> 
> Johan,
> 
> The "purple problems" are a different view of this same 
> error. Having experienced both I can say that you either get 
> bb-net to crash or you find that all your remote connection 
> tests (where bbtest-net verifies if a remote port is 
> accessible) turn purple. Possibly you may get both at the 
> same time, I haven't noticed that yet.
> 
> I can confirm that using the new dns.c code bbtest-net 
> crashes on my Solaris 10 system whether I use the --no-ares 
> option or not. 8-(
> 
> |\/|artin
> 
> 
> > -----Original Message-----
> > From: Johan Sjöberg [mailto:johan.sjoberg at deltamanagement.se]
> > Sent: 09 January 2009 08:49
> > To: hobbit at hswn.dk
> > Subject: RE: [hobbit] Two DNS lookups for a server but one fails
> > 
> > 
> > We did not experience any "purple" problems, only this single
> > crash of the bbtest-net. But I suppose that several 
> > consecutive crashes would have caused the tests to go purple.
> > 
> > /Johan
> > 
> > -----Original Message-----
> > From: Everett, Vernon [mailto:Vernon.Everett at woodside.com.au]
> > Sent: den 9 januari 2009 07:44
> > To: hobbit at hswn.dk
> > Subject: RE: [hobbit] Two DNS lookups for a server but one fails
> > 
> > This looks remarkably like the error we were experiencing. What are 
> > you running on?
> > 
> > Do you have the case where all the network tests - ping,
> > http, https, ftp etc. go purple? If so it might be the same.
> > 
> > With Henrik's assistance, we resolved it down to a problem
> > with the ARES resolver. I changed our hobbitlaunch.cfg file 
> > to include the --no-ares option (see below), and we have 
> > never had the issue again. [bbnet]
> >         ENVFILE /usr/lib/hobbit/server/etc/hobbitserver.cfg
> >         NEEDS hobbitd
> >         CMD bbtest-net --report --ping --checkresponse --no-ares
> >         LOGFILE $BBSERVERLOGS/bb-network.log
> >         INTERVAL 5m 
> > 
> > (Of course this does come with a caveat. See bbtest-net man
> > page in Xymon docs 
> > http://www.xymon.com/hobbit/help/manpages/man1/bbtest-net.1.html )
> > 
> > YMMV.
> > 
> > Cheers
> >    V
> > 
> > 
> > 
> > -----Original Message-----
> > From: doctor at makelofine.org [mailto:doctor at makelofine.org]
> > Sent: Friday, 9 January 2009 3:34 PM
> > To: hobbit at hswn.dk
> > Subject: Re: [hobbit] Two DNS lookups for a server but one fails
> > 
> > On Thu, 8 Jan 2009 09:24:29 +0100, "Lars Ebeling"
> > <lars.ebeling at leopg9.no-ip.org> wrote:
> > > ----- Original Message -----
> > > From: "Johan Sjöberg" <johan.sjoberg at deltamanagement.se>
> > > To: <hobbit at hswn.dk>
> > > Sent: Thursday, January 08, 2009 9:04 AM
> > > Subject: RE: [hobbit] Two DNS lookups for a server but one fails
> > > 
> > > 
> > > This night, after installing the new bbtest-net, we
> > received an alarm
> > > on bbtest for the Xymon server, saying " - Program crashed Fatal
> > > signal caught!"
> > >>From hobbitlaunch.log: "2009-01-08 05:05:07 Task bbnet 
> terminated by 
> > >>signal 6"
> > > 
> > > /Johan
> > > 
> > > 
> > > If the program crash, you should have a coredump. Run gdb on the 
> > > coredump
> > 
> > > and post the result here, for Henrik to look at.
> > > 
> > > --
> > > Regards
> > > Lars Ebeling
> > > 
> > > http://leopg9.no-ip.org
> > > Hobbithobbyist
> > > 
> > > "I am not young enough to know everything."
> > > -- Oscar Wilde
> > > 
> > > 
> > > 
> > > To unsubscribe from the hobbit list, send an e-mail to 
> > > hobbit-unsubscribe at hswn.dk
> > > 
> > 
> > Hi,
> > 
> > Same issue on my side, i used the new compiled bbtest-net
> > using corrected dns.c All is OK, but i got same issue with 
> > same error message.
> > 
> > To unsubscribe from the hobbit list, send an e-mail to
> > hobbit-unsubscribe at hswn.dk
> > 
> > 
> > 
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> > 
> > 
> 
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No contracts can be created or varied on behalf of COLT Telecommunications, its subsidiaries or affiliates ("COLT") and any other party by email Communications unless expressly agreed in writing with such other party.  

Please note that incoming emails will be automatically scanned to eliminate potential viruses and unsolicited promotional emails. For more information refer to www.colt.net or contact us on +44(0)20 7390 3900.