Re: [Pdns-users] Debugging Information Pipe-Backend
On Sat, Aug 29, 2015 at 12:35:20PM -0400, Stan Weatherby wrote: Is there any more debugging information I can get from the pipebackend? I’m randomly (seems it anyway) receiving very general errors as such: == [PIPEBackend] Fatal argument error: Timeout waiting for data from coprocess Caught an exception instantiating a backend: Timeout waiting for data from coprocess Distributor caught fatal exception: Timeout waiting for data from coprocess == I don’t see any escalation in cpu usage or memory in these instances and am not seeing any pipe script errors logged. The pipe-timeout is set to 5000. How can I further debug where this is dying? Any help/advice would be greatly appreciated! -Stan Hi! Best way to debug your pipe backend is to log all received questions and answers. Usually this error indicates that you forgot to reply with something that was expected. Aki ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
Re: [Pdns-users] Debugging bogus NXDOMAIN replies
Since it's all myisam, you may be running into a concurrence problem where a select has a table locked for a split second and a new request comes in at the same time. Innodb gets you row level locking. It's probably nothing to worry about if it doesn't happen that often. If you turn on query logging in mysql, you could probably see what's going on. Sent on a Sprint Samsung Galaxy S® III div Original message /divdivFrom: Willem de Groot wil...@byte.nl /divdivDate:06/30/2014 11:15 AM (GMT-05:00) /divdivTo: pdns-users@mailman.powerdns.com /divdivSubject: [Pdns-users] Debugging bogus NXDOMAIN replies /divdiv /divHi pdns people! The following issue has kept me busy for many days to no avail. Suggestions are much appreciated. My pdns auth server answers 2M queries per day. At random times, but about once or twice per day, an unexpected NXDOMAIN reply is sent out. The auth log (loglevel 9) dutifully but sparingly reports: Jun 30 14:31:49 dns2.c1.internal pdns[2100]: Authoritative NXDOMAIN to 10.1.2.222 for 'database25.c1.internal' (A) This record certainly exists in the gmysql backend, as is demonstrated by the thousands of successful lookups [1]. How would I debug this issue? Is there perhaps a way to crank up logging for the gmysql module (queries and replies)? I couldn't find any references to this record in the mysql-slow.log, while other queries 1sec are logged there. NB, there some suspects: * pdns auth version is 2.9.22-8+squeeze1 (standard Debian) * mysql db schema is still myisam, with 1M+ rows in the records table (very infrequent updates though) Because updating is quite a hassle, I'd like to do that as a last resort. Plus, I can't stand not knowing where the failure is coming from ;) TIA! Willem [1] As witnessed by tcpdump: A good reply: 10.1.2.222.53 10.1.2.222.9617: 62526*- q: A? dbint029896.c1.internal. 2/0/0 dbint029896.c1.internal. CNAME database25.c1.internal., database25.c1.internal. A 10.1.2.126 (82) A bad reply (cname yes, a record no) 10.1.2.222.53 10.1.2.222.12384: 28255 NXDomain*- q: A? dbint029896.c1.internal. 1/1/0 dbint029896.c1.internal. CNAME database25.c1.internal. ns: internal. SOA nsa.company.nl. hostmaster.company.nl. 2009121500 10800 3600 604800 3600 (124) ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
RE: [Pdns-users] Debugging
Hi Bert, I get about 3 different types of crashes. There is no rhyme or reason to them. I watch the command prompt log to see if it crashes on the same type of action, and it doesn't. I was hoping setting up the service to restart after a failure would fix the problem, but it seems that the program is still running, just not answering. I have been trying to figure out why 1 server works fine, and 2 others don't. There is no rhyme or reason to them either. Is there an older build of the windows version that is more stable? I don't need bells and whistles, just simple A, CNAME, MX, SOA records, etc. And I don't need primary and slave servers because I simply use replication in my MS SQL DB so if I update one, they all get updated. Thanks for your help. Michael C. Gates -Original Message- From: bert hubert [mailto:[EMAIL PROTECTED] Sent: Saturday, August 26, 2006 4:53 AM To: Michael C. Gates Cc: pdns-users@mailman.powerdns.com Subject: Re: [Pdns-users] Debugging On Fri, Aug 25, 2006 at 07:08:43PM -0400, Michael C. Gates wrote: Any way to create a program log so I can figure out why mine is crashing every once in a while? If I download the source, can I open it in Visual Studio 2005? Or was it written in something else? I know C#, but not much of C++. I wouldn't mind figuring it out if it solved the crashing C++problem. The PowerDNS Recursor compiles in Visual Studio 2005, the authoritative server doesn't. The currently last released version of the PowerDNS Authoritative server is known to have many, many bugs. Can you let us know more about your specific problem? Thanks. -- http://www.PowerDNS.com Open source, database driven DNS Software http://netherlabs.nl Open and Closed source services ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
