[dns-operations] Can't resolve NIH.GOV records

[Craig Leres]

I found a clue to my MX problems with extra.niddk.nih.gov. Last
night backups failed on one of my systems with:

    ssh: Could not resolve hostname hagar.lbl.gov: hostname nor servname
provided, or not known

I looked at the logs and found this:

    May 13 06:00:01 zip.lbl.gov named[730]: no valid DS resolving
'hagar.lbl.gov/A/IN': 128.3.34.186#53

Note that lbl.gov is *not* signed yet.

I went back and looked one of the mail hosts and it was getting
tons of these for list.nih.gov:

    May 11 13:29:22 portnoy named[54927]: no valid DS resolving
'LIST.NIH.GOV/A/IN': 165.112.4.230#53
    May 11 13:29:22 portnoy named[54927]: no valid DS resolving
'LIST.NIH.GOV/A/IN': 128.231.128.251#53

The only way I could get the mailing list to work on that host was
to turn off DLV. I do not believe nih.gov is signed.

Both systems run 9.6.0-P1.

Is "no valid DS resolving" for unsigned zones a known bug? Are there
any fixes aside from turning off lookaside validation? For example,
is this fixed in 9.6.1b1?

		Craig