[Pdns-dev] Another oddity about non-existing hosts

[Norbert Sendetzky]

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Hi all

These are the questions asked (logged by lookup() in the ldapbackend) 
if I queried for a non-existant host:


Jan 16 21:01:20 notebook pdns[5529]: [LdapBackend] Search = basedn: 
ou=hosts,o=linuxnetworks,c=de, filter: 
(associatedDomain=nxt.linuxnetworks.de), qtype: ANY

The first query is fine. The host doesn't exist and nothing is 
retured.


Jan 16 21:01:20 notebook pdns[5529]: [LdapBackend] Search = basedn: 
ou=hosts,o=linuxnetworks,c=de, filter: 
(associatedDomain=nxt.linuxnetworks.de), qtype: ANY

The same query happened again. This is odd and shouldn't be!


Jan 16 21:01:20 notebook pdns[5529]: [LdapBackend] Search = basedn: 
ou=hosts,o=linuxnetworks,c=de, filter: 
(&(associatedDomain=nxt.linuxnetworks.de)(SOARecord=*)), qtype: SOA

Jan 16 21:01:20 notebook pdns[5529]: [LdapBackend] Search = basedn: 
ou=hosts,o=linuxnetworks,c=de, filter: 
(&(associatedDomain=linuxnetworks.de)(SOARecord=*)), qtype: SOA

Search the SOA record. Found for linuxnetworks.de. Ok.


Jan 16 21:01:20 notebook pdns[5529]: [LdapBackend] Search = basedn: 
ou=hosts,o=linuxnetworks,c=de, filter: 
(associatedDomain=nxt.linuxnetworks.de), qtype: ANY

The original query is done again! Is the client asking again because 
an answer wasn't retured immediately?


Jan 16 21:01:20 notebook pdns[5529]: [LdapBackend] Search = basedn: 
ou=hosts,o=linuxnetworks,c=de, filter: 
(&(associatedDomain=nxt.linuxnetworks.de)(SOARecord=*)), qtype: SOA

Another question for the SOA record. Seems to be related to the last 
query.


This was done without caching (cache-ttl=0, negquery-cache-ttl=0, 
query-cache-ttl=0), because I wanted to see into how many queries a 
question translates. Can anyone confirm that behaviour?


Norbert

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