My apologies if I'm posting the wrong place, or am asking a common question. All my looking so far hasn't turned up anything very useful in knowing what to look at, or what to modify. --- CentOS 5, running BIND 9.3.6 i386 Hardware: P4, 2.8Ghz, 1G memory Sata drives - non mirrored etc. Load is light, usually under 0.1 -- This box is running Postfix as our mail server. BIND (9.3.6) [Latest.] -- Problem: Postfix is doing RBL lookups on zen.spamhaus.org. Everything goes along groovy - but then lookups start failing. Early in the process, we get stuff like this: [We have a "successful" lookup, and then a failure...] --- Apr 14 14:25:05 mail postfix/smtpd[22281]: NOQUEUE: reject: RCPT from bzq-79-183-5-119.red.bezeqint.net[79.183.5.119]: 554 5.7.1 Service unavailable; Client host [79.183.5.119] blocked using zen.spamhaus.org; from=<contriveclaudia at royalmoore.com> to=<contriveclaudia at royalmoore.com> proto=SMTP helo=<bzq-79-183-5-119.red.bezeqint.net> Apr 14 14:25:07 mail postfix/smtpd[22804]: warning: 33.229.242.205.zen.spamhaus.org: RBL lookup error: Host or domain name not found. Name service error for name=33.229.242.205.zen.spamhaus.org type=A: Host not found, try again --- As you can see, we had a lookup succeed and then just right after, one fail - claiming it got no answer from BIND. I get others after this that SUCCEED - so it's not in 100% failure mode yet. After time [how much, I don't know] eventually all the zen queries [or most all] fail. A bind restart fixes the problem. [Hmmm...] --- I do some logging in bind, and I don't see any reason for them to fail. Here's a bind debug log of 5 on that failure above. --- 14-Apr-2010 14:24:57.654 queries: info: client 127.0.0.1#42018: query: 33.229.242.205.zen.spamhaus.org IN A + 14-Apr-2010 14:24:57.654 security: debug 3: client 127.0.0.1#42018: query (cache) '33.229.242.205.zen.spamhaus.org/A/IN' approved 14-Apr-2010 14:24:57.654 resolver: debug 1: createfetch: 33.229.242.205.zen.spamhaus.org A 14-Apr-2010 14:24:57.654 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): create 14-Apr-2010 14:24:57.654 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): join 14-Apr-2010 14:24:57.654 resolver: debug 3: fetch 0x94a0b20 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): created 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): start 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelqueries 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): getaddresses 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:01.658 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:01.659 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:01.659 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:01.659 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:02.653 queries: info: client 127.0.0.1#42018: query: 33.229.242.205.zen.spamhaus.org IN A + 14-Apr-2010 14:25:02.653 security: debug 3: client 127.0.0.1#42018: query (cache) '33.229.242.205.zen.spamhaus.org/A/IN' approved 14-Apr-2010 14:25:02.654 resolver: debug 1: createfetch: 33.229.242.205.zen.spamhaus.org A 14-Apr-2010 14:25:02.654 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): join 14-Apr-2010 14:25:02.654 resolver: debug 3: fetch 0x94d54c8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): created 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:07.664 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:07.665 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:07.665 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:07.665 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:08.393 queries: info: client 127.0.0.1#50896: query: 33.229.242.205.zen.spamhaus.org IN A + 14-Apr-2010 14:25:08.393 security: debug 3: client 127.0.0.1#50896: query (cache) '33.229.242.205.zen.spamhaus.org/A/IN' approved 14-Apr-2010 14:25:08.393 resolver: debug 1: createfetch: 33.229.242.205.zen.spamhaus.org A 14-Apr-2010 14:25:08.393 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): join 14-Apr-2010 14:25:08.393 resolver: debug 3: fetch 0x94ad9c8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): created 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:13.669 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:13.670 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:13.670 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:13.670 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:19.674 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:19.675 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:19.675 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:19.675 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:23.677 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts, disabling EDNS0 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone 14-Apr-2010 14:25:23.912 resolver: debug 3: resquery 0x94ae7b8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): response 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): noanswer_response 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): ncache_message 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): clone_results 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): done 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): stopeverything 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelqueries 14-Apr-2010 14:25:23.913 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): sendevents 14-Apr-2010 14:25:23.913 resolver: debug 3: fetch 0x94a0b20 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): destroyfetch 14-Apr-2010 14:25:23.913 resolver: debug 3: fetch 0x94d54c8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): destroyfetch 14-Apr-2010 14:25:23.913 resolver: debug 3: fetch 0x94ad9c8 (fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A)): destroyfetch 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): shutdown 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): doshutdown 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): stopeverything 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelqueries 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx 0x932e140(33.229.242.205.zen.spamhaus.org/A'): destroy --- As far as I can see, the BIND query simply didn't get a response - but no errors? --- First, someone's going to ask - perhaps Zen's blocking you. I don't think so. Here's why. -We're non-commercial, using the definition set my spamhaus, -mail connects TOTAL are well less than 100K a day. (Less than 10K in actuality) -and thus having more than 300K queries is pretty unlikely. -Also, let me remind you that a restart of the bind service seems to make the failures go away for a while, so if zen were blocking our queries, I'd think that wouldn't make a difference. --- I certainly suspect a problem with BIND, but I can't find it, and have no idea where to go from here. I simply don't know where to look any more. If BIND were having a problem, say allocating memory, or something, shouldn't it be in a debug level 5 log? HELP! -Greg [Cross posted from elsewhere, but I'm at a dead-end right now, so looking for a steer in where to ask, or direct help! TIA]