cds system test fails intermittently

The failure mode below has been observed 2 times so far:

S:cds:Tue Mar  6 15:58:36 UTC 2018
T:cds:1:A
A:cds:System test cds
I:cds:PORTRANGE:6200 - 6299
I:cds:usage (1)
I:cds:need a DS file (2)
I:cds:name of dsset in directory (3)
I:cds:load a file (4)
I:cds:load DS records (5)
I:cds:missing DNSKEY (6)
I:cds:sigs too old (7)
I:cds:sigs too old, verbosely (8)
I:cds:old sigs are allowed (9)
I:cds:no CDS/CDNSKEY records (10)
I:cds:no child records, verbosely (11)
I:cds:unsigned CDS (12)
I:cds:correct signature inception time (13)
I:cds:in-place reads modification time (14)
I:cds:in-place output correct modification time (15)
D:stderr did not match ''
D:bad mtime 3610 at checkmtime.pl line 15.
I:cds:failed
D:exit status does not match 0
I:cds:failed
I:cds:in-place backup correct modification time (16)
D:stderr did not match ''
D:bad mtime 7210 at checkmtime.pl line 15.
I:cds:failed
D:exit status does not match 0
I:cds:failed
I:cds:in-place correct output (17)
I:cds:in-place backup unmodified (18)
I:cds:one mangled DS (19)
I:cds:other mangled DS (20)
I:cds:both mangled DS (21)
I:cds:mangle RRSIG CDS by ZSK (22)
I:cds:mangle RRSIG CDS by KSK (23)
I:cds:mangle CDS 1 (24)
I:cds:inconsistent digests (25)
I:cds:inconsistent algorithms (26)
I:cds:add DS records (27)
I:cds:update add (28)
I:cds:remove DS records (29)
I:cds:update del (30)
I:cds:swap DS records (31)
I:cds:update swap (32)
I:cds:TTL from -T (33)
I:cds:update TTL from -T (34)
I:cds:update TTL from dsset (35)
I:cds:TTL from -T overrides dsset (36)
I:cds:stable DS record order (changes) (37)
I:cds:CDNSKEY default algorithm (38)
I:cds:CDNSKEY SHA1 (39)
I:cds:CDNSKEY two algorithms (40)
I:cds:CDNSKEY two algorithms, reversed (41)
I:cds:CDNSKEY and CDS (42)
I:cds:prefer CDNSKEY (43)
I:cds:exit status: 4
R:cds:FAIL
E:cds:Tue Mar  6 15:59:05 UTC 2018

Contents of bin/tests/system/cds/ from both jobs listed above are attached.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information