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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>We had the same thing, affected only one of our DNS servers (behind a load-balancer). Here’s the relevant log snippet:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: query.c:1781: INSIST(! dns_rdataset_isassociated(sigrdataset)) failed, back trace<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #0 0x7f1b1e97686f in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #1 0x7f1b1d346b1a in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #2 0x7f1b1e982f8a in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #3 0x7f1b1e237e93 in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #4 0x7f1b1e263e9d in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #5 0x7f1b1e97aa1e in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #6 0x7f1b1e98036d in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #7 0x7f1b1e981bb7 in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #8 0x7f1b1d365439 in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #9 0x7f1b1c74a8ba in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: #10 0x7f1b1c16202d in ??<o:p></o:p></p><p class=MsoPlainText>Nov 15 23:03:33 mail1 named[4601]: exiting (due to assertion failure)<o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>All times are U.S. Central Time and we’re running on Debian (Linux mail1 2.6.32-5-amd64 #1 SMP Wed Jan 12 03:40:32 UTC 2011 x86_64 GNU/Linux).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoPlainText>server:/etc/rc3.d# /usr/sbin/named -v<o:p></o:p></p><p class=MsoPlainText>BIND 9.7.3<o:p></o:p></p><p class=MsoPlainText>server:/<o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Frank<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> bind-users-bounces+frnkblk=iname.com@lists.isc.org [mailto:bind-users-bounces+frnkblk=iname.com@lists.isc.org] <b>On Behalf Of </b>Samer Khattab<br><b>Sent:</b> Wednesday, November 16, 2011 2:09 AM<br><b>To:</b> bind-users@lists.isc.org<br><b>Subject:</b> BIND 9.7.3-P3 crash on multiple cashing servers<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>8 of our cashing-only name servers crashed in a random sequence, and the crash happened in a 10 minutes time. The servers are running BIND 9.7.3-P3.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The crash produced a core dump for the named process.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Does anybody has a similar case recently? Is this a security issue ?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards,<o:p></o:p></p></div><div><p class=MsoNormal>Samer<o:p></o:p></p></div></div></body></html>