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net: TestLookupGmailTXT failing on Plan 9 #29722

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0intro opened this issue Jan 13, 2019 · 4 comments
Open

net: TestLookupGmailTXT failing on Plan 9 #29722

0intro opened this issue Jan 13, 2019 · 4 comments
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NeedsInvestigation OS-Plan9
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@0intro
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@0intro 0intro commented Jan 13, 2019

Since CL 157638, TestLookupGmailTXT is failing on Plan 9.

--- FAIL: TestLookupGmailTXT (0.01s)
    lookup_test.go:248: got [globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=]; want a record containing spf, google.com
    lookup_test.go:248: got [globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=]; want a record containing spf, google.com
FAIL
FAIL	net	28.014s

See https://build.golang.org/log/10777f5ddff9d26836ac135c8c451166efa529ca
@0intro 0intro added this to the Go1.12 milestone Jan 13, 2019
@0intro 0intro self-assigned this Jan 13, 2019
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@0intro 0intro commented Jan 13, 2019

This is related to issue #22857.

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@0intro 0intro commented Jan 13, 2019 •
edited

The Plan 9 DNS resolver (ndb/dns) only returns a single TXT record, so the TXT request on gmail.com returns either the SPF or the S/MIME record depending on the machine on which ndb/dns is run.

cpu% ndb/dnsquery
> gmail.com txt
gmail.com txt	v=spf1 redirect=_spf.google.com

cpu% ndb/dnsquery
> gmail.com txt
gmail.com txt globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=

@gopherbot
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@gopherbot gopherbot commented Jan 13, 2019

Change https://golang.org/cl/157737 mentions this issue: net: skip TestLookupGmailTXT on Plan 9

gopherbot pushed a commit that referenced this issue Jan 14, 2019
@0intro
net: skip TestLookupGmailTXT on Plan 9
4e8aaf6 
CL 157638 updated TestLookupGmailTXT. However, this
test is failing on Plan 9, because the DNS resolver
(ndb/dns) only returns a single TXT record.

Updates #29722.

Change-Id: I01cd94e6167902361c3f5d615868f6f763a31fb1
Reviewed-on: https://go-review.googlesource.com/c/157737
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
@bradfitz bradfitz removed this from the Go1.12 milestone Jan 14, 2019
@bradfitz bradfitz added this to the Unplanned milestone Jan 14, 2019
@fhs
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@fhs fhs commented Feb 25, 2021 •
edited

Update: 9front can return multiple txt records, but there is a bug with caching. You lose the SPF record after it expires.

cpu% ndb/dnsdebug
> gmail.com txt
....
----------------------------
answer gmail.com                        5 min           txt   v=spf1 redirect=_spf.google.com
answer gmail.com                        1 hr            txt   globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=
----------------------------

cpu% ndb/dnsquery
> gmail.com txt
gmail.com txt v=spf1 redirect=_spf.google.com
gmail.com txt globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=
> [wait 5 minutes here]
> gmail.com txt
gmail.com txt globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=
>

@gopherbot please add label OS-Plan9

@jaredpar jaredpar mentioned this issue Apr 22, 2021
Closed
@dagood dagood mentioned this issue Apr 22, 2021
Open
@rsc rsc unassigned 0intro Jun 23, 2022
@cagedmantis cagedmantis added the NeedsInvestigation label Jun 23, 2022
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