Re: SERVFAIL on 9.6.1-P1

Mon, 23 Nov 2009 09:49:11 -0800 

Phillips, Dustin B (DBphillips) wrote:

Hello BIND users,
We experienced a SERVFAIL on a single domain this morning but were able to resolve the issue by flushing the servers cache with ‘rndc flush’.
I gathered some debugs (below) and am hoping someone can shed light on what might have been causing the failure. 

Note: I replaced the real domain with “{domain removed}” in the debugs.

Before rndc flush:

23-Nov-2009 10:19:59.213 debug 3: client 24.217.29.1#42785: UDP request
23-Nov-2009 10:19:59.213 debug 3: client 24.217.29.1#42785: query
23-Nov-2009 10:19:59.213 debug 3: client 24.217.29.1#42785: replace
23-Nov-2009 10:19:59.213 debug 1: createfetch: {domain removed} A
23-Nov-2009 10:19:59.214 debug 3: fctx 98757d0({domain removed}/A'): create 
23-Nov-2009 10:19:59.214 debug 3: fctx 98757d0({domain removed}/A'): join
23-Nov-2009 10:19:59.214 debug 3: fetch 56b4cb0 (fctx 98757d0({domain removed}/A)): created 
23-Nov-2009 10:19:59.214 debug 3: fctx 98757d0({domain removed}/A'): start
23-Nov-2009 10:19:59.214 debug 3: fctx 98757d0({domain removed}/A'): try
23-Nov-2009 10:19:59.214 debug 3: fctx 98757d0({domain removed}/A'): cancelqueries 23-Nov-2009 10:19:59.214 debug 3: fctx 98757d0({domain removed}/A'): getaddresses 23-Nov-2009 10:19:59.215 debug 3: fctx 98757d0({domain removed}/A'): no addresses 
23-Nov-2009 10:19:59.215 debug 3: fctx 98757d0({domain removed}/A'): done
23-Nov-2009 10:19:59.215 debug 3: fctx 98757d0({domain removed}/A'): stopeverything 23-Nov-2009 10:19:59.215 debug 3: fctx 98757d0({domain removed}/A'): cancelqueries 23-Nov-2009 10:19:59.215 debug 3: fctx 98757d0({domain removed}/A'): sendevents 23-Nov-2009 10:19:59.215 debug 1: client 24.217.29.1#42785: query failed (SERVFAIL) for {domain removed}/IN/A at query.c:4619 
23-Nov-2009 10:19:59.215 debug 3: client 24.217.29.1#42785: error
23-Nov-2009 10:19:59.215 debug 3: client 24.217.29.1#42785: send
23-Nov-2009 10:19:59.215 debug 3: client 24.217.29.1#42785: sendto
23-Nov-2009 10:19:59.216 debug 3: client 24.217.29.1#42785: senddone
23-Nov-2009 10:19:59.216 debug 3: client 24.217.29.1#42785: next
23-Nov-2009 10:19:59.216 debug 3: client 24.217.29.1#42785: endrequest
23-Nov-2009 10:19:59.216 debug 2: fetch completed at resolver.c:2998 for {domain removed}/A in 0.001186: failure/success [domain:{domain removed},referral:0,restart:1,qrysent:0,timeout:0,lame:0,neterr:0,badresp:0,adberr:2,findfail:0,valfail:0] 23-Nov-2009 10:19:59.216 debug 3: fetch 56b4cb0 (fctx 98757d0({domain removed}/A)): destroyfetch 23-Nov-2009 10:19:59.216 debug 3: fctx 98757d0({domain removed}/A'): shutdown 23-Nov-2009 10:19:59.216 debug 3: fctx 98757d0({domain removed}/A'): doshutdown 23-Nov-2009 10:19:59.216 debug 3: fctx 98757d0({domain removed}/A'): stopeverything 23-Nov-2009 10:19:59.216 debug 3: fctx 98757d0({domain removed}/A'): cancelqueries 23-Nov-2009 10:19:59.216 debug 3: fctx 98757d0({domain removed}/A'): destroy 


After rndc flush:

23-Nov-2009 10:20:07.047 debug 3: client 24.217.29.1#43324: UDP request
23-Nov-2009 10:20:07.047 debug 3: client 24.217.29.1#43324: query
23-Nov-2009 10:20:07.047 debug 3: client 24.217.29.1#43324: replace
23-Nov-2009 10:20:07.047 debug 1: createfetch: {domain removed} A
23-Nov-2009 10:20:07.048 debug 3: fctx 9875a30({domain removed}/A'): create 
23-Nov-2009 10:20:07.048 debug 3: fctx 9875a30({domain removed}/A'): join
23-Nov-2009 10:20:07.048 debug 3: fetch 9a6d2c8 (fctx 9875a30({domain removed}/A)): created 
23-Nov-2009 10:20:07.084 debug 3: fctx 9875a30({domain removed}/A'): start
23-Nov-2009 10:20:07.084 debug 3: fctx 9875a30({domain removed}/A'): try
23-Nov-2009 10:20:07.085 debug 3: fctx 9875a30({domain removed}/A'): cancelqueries 23-Nov-2009 10:20:07.085 debug 3: fctx 9875a30({domain removed}/A'): getaddresses 
23-Nov-2009 10:20:07.086 debug 3: fctx 9875a30({domain removed}/A'): query
23-Nov-2009 10:20:07.086 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): send 23-Nov-2009 10:20:07.087 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): sent 23-Nov-2009 10:20:07.092 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): udpconnected 23-Nov-2009 10:20:07.092 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): senddone 23-Nov-2009 10:20:07.370 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): response 23-Nov-2009 10:20:07.370 debug 3: fctx 9875a30({domain removed}/A'): noanswer_response 23-Nov-2009 10:20:07.370 debug 3: fctx 9875a30({domain removed}/A'): cache_message 23-Nov-2009 10:20:07.371 debug 3: fctx 9875a30({domain removed}/A'): cancelquery 23-Nov-2009 10:20:07.371 debug 3: fctx 9875a30({domain removed}/A'): cancelqueries 
23-Nov-2009 10:20:07.371 debug 3: fctx 9875a30({domain removed}/A'): try
23-Nov-2009 10:20:07.371 debug 3: fctx 9875a30({domain removed}/A'): cancelqueries 23-Nov-2009 10:20:07.371 debug 3: fctx 9875a30({domain removed}/A'): getaddresses 
23-Nov-2009 10:20:07.372 debug 3: fctx 9875a30({domain removed}/A'): query
23-Nov-2009 10:20:07.372 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): send 23-Nov-2009 10:20:07.373 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): sent 23-Nov-2009 10:20:07.375 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): udpconnected 23-Nov-2009 10:20:07.375 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): senddone 23-Nov-2009 10:20:07.541 debug 3: resquery 987b310 (fctx 9875a30({domain removed}/A)): response 23-Nov-2009 10:20:07.541 debug 3: fctx 9875a30({domain removed}/A'): answer_response 23-Nov-2009 10:20:07.541 debug 3: fctx 9875a30({domain removed}/A'): cache_message 23-Nov-2009 10:20:07.541 debug 3: fctx 9875a30({domain removed}/A'): clone_results 23-Nov-2009 10:20:07.541 debug 3: fctx 9875a30({domain removed}/A'): cancelquery 
23-Nov-2009 10:20:07.541 debug 3: fctx 9875a30({domain removed}/A'): done
23-Nov-2009 10:20:07.542 debug 3: fctx 9875a30({domain removed}/A'): stopeverything 23-Nov-2009 10:20:07.542 debug 3: fctx 9875a30({domain removed}/A'): cancelqueries 23-Nov-2009 10:20:07.542 debug 3: fctx 9875a30({domain removed}/A'): sendevents 
23-Nov-2009 10:20:07.576 debug 3: client 24.217.29.1#43324: send
23-Nov-2009 10:20:07.577 debug 3: client 24.217.29.1#43324: sendto
23-Nov-2009 10:20:07.577 debug 3: client 24.217.29.1#43324: senddone
23-Nov-2009 10:20:07.577 debug 3: client 24.217.29.1#43324: next
23-Nov-2009 10:20:07.577 debug 3: client 24.217.29.1#43324: endrequest
23-Nov-2009 10:20:07.577 debug 3: fetch 9a6d2c8 (fctx 9875a30({domain removed}/A)): destroyfetch 23-Nov-2009 10:20:07.577 debug 3: fctx 9875a30({domain removed}/A'): shutdown 23-Nov-2009 10:20:07.604 debug 3: fctx 9875a30({domain removed}/A'): doshutdown 23-Nov-2009 10:20:07.604 debug 3: fctx 9875a30({domain removed}/A'): stopeverything 23-Nov-2009 10:20:07.604 debug 3: fctx 9875a30({domain removed}/A'): cancelqueries 23-Nov-2009 10:20:07.604 debug 3: fctx 9875a30({domain removed}/A'): destroy 



Thanks in advance for any information you can provide.



"no addresses" implies a bad delegation of some sort.

(Generic response to a request for help with an "anonymized" domain name).

- Kevin

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