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<div class="moz-cite-prefix">On 22/08/2019 09:10, 姜伯洋 wrote:<br>
</div>
<blockquote type="cite"
cite="mid:37d69412.b85f.16cb860315e.Coremail.15555513217@163.com">
<div><font face="verdana" color="#555555"><span style="font-size:
12px;">When the parsing fails, it’s like this But if there
are a total of ten resolutions, there may be 3-4 failures.</span></font></div>
<div><font face="verdana" color="#555555"><span style="font-size:
12px;">user.test.com This domain name is the internal domain
name. I specified that if it is the resolution of the
internal domain name, it will go to my internal
authoritative server.</span></font></div>
</blockquote>
<p>Therefore: show your pdns-recursor configuration. Are you using
"forward-zones" or "forward-zones-files" perhaps? What have you
put in the them? Are you forwarding to a single authoritative
server, or to several?<br>
</p>
<p>Then: what authoritative server are you using? How is it
configured it for this zone?</p>
<p>Show the "dig" output from:</p>
<p>- a successful lookup from pdns-recursor (you only showed an
empty one)</p>
<p>- direct dig to the authoritative server. What happens if you
repeat it? Do you get the same answers, or different ones?
What's the TTL returned?<br>
</p>
<p>It's possible that the authoritative server(s) are not returning
consistent answers, and are returning them with a very low TTL.
But this sort of thing is very hard to diagnose without seeing
actual configurations, actual dig output and/or actual packet
captures.</p>
<p>Please read the support statement I linked to before. If you're
not prepared to post the actual domain you're using, then
reproduce the problem with another domain: for example, create the
actual domain "example.com" on your authoritative nameserver and
configure forwarding to it from your recursor. Then you can post
real dig output and packet captures without having to mangle them.<br>
</p>
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