BIND 9.20.6: spurious recursive lookup failures after longish uptime

[Ben Scott]

> From: "Havard Eidnes via bind-users" 
> Sent: Thursday, March 13, 2025 7:21:32 AM

> The reason is that the "how to reproduce the problem" bit is
> quite fuzzy.

  Yeah.  :-(  In general, without logs or similar, it is impossible to diagnose this sort of problem by DNS results alone.  Unless zone data is broken in some obvious way, this is going involve what is happening within the BIND process.  (Even if the root cause is external, it is going through BIND, so we have to start there.)

> unsuccessfuly looked in the logs for the SERVFAIL for this
> domain, but apparently our logging does not catch those.

  What is your logging config like?  Maybe post an extract of your logging{} block?

  Sometimes BIND is trying to say what is wrong, but the log config is throwing it away.

  -- Ben

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