[Pdns-users] DiG _trace: no response, no fail, nothing

[stancs3]

I have seen this problem posted in various places over the years. It is
not clear if it is a bug, a bad config, or just non-functional.

My set up:

VM running Centos 7, up to date.
pdns install using postgresql db.
pdns-recursor install.

pdns is running as an authoritive ns, standalone, replicated via
postgresql to a second VM, pretty much identical.


pdns is set with recursor=local-address:5300

pdns-recursor is set with local-address equal to pdns local-address
above

pdns-recursor is set with local-port equal to pdns 5300 above.

It all seems to work.

The authoritive nameserver is private, and is populated with a few records which work.

The recursor is being tested with DiG. (and with typical surfing). I have verified that the VM has no other dns function working in parallel.

All DiG commands so far work with the exception of +trace.

I have logs running, and can easily see logs generated for DiG commands that work.

I have attached a console example. The logs and console indicate that the DiG command with +trace doesn't fail; it just doesn't even respond.

If I target the same DiG +trace command at my router's dnsmasq, it responds as expected with a whole bunch of trace info.

I have tried for days/hours with all variations I can think of and all manner of surfing for solutions. If there were failure logs it would help, but absolutely zero logs with the +trace command is issued to pdns. 

I have also dumped my cache and it has many NS records.

I am tempted to simply ignore this and just use the thing as it seems to work. I only tried DiG +trace to see how it all works......
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[stanloc at x029s1 ~]$ dig www.google.com

; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.1 <<>> www.google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38058
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com.			IN	A

;; ANSWER SECTION:
www.google.com.		300	IN	A	24.244.4.58
www.google.com.		300	IN	A	24.244.4.57
www.google.com.		300	IN	A	24.244.4.55
www.google.com.		300	IN	A	24.244.4.59
www.google.com.		300	IN	A	24.244.4.56
www.google.com.		300	IN	A	24.244.4.52
www.google.com.		300	IN	A	24.244.4.54
www.google.com.		300	IN	A	24.244.4.53

;; Query time: 152 msec
;; SERVER: 192.168.1.148#53(192.168.1.148)
;; WHEN: Thu Feb 16 17:18:11 MST 2017
;; MSG SIZE  rcvd: 160


[stanloc at x029s1 ~]$ dig +trace www.google.com

; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.1 <<>> +trace www.google.com
;; global options: +cmd
;; Received 28 bytes from 192.168.1.148#53(192.168.1.148) in 25 ms