autobuild[sn-devel-144]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-144) has detected an intermittent failing test in 
the current master tree.

The autobuild log of the failure is available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-26-1834/flakey.log

The failure seems to be in the "samba-nt4" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-26-1834/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-26-1834/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 5757d259321f20fab349fd1a0d447473ba2c8fc6
Author: Ralph Boehme <slow at samba.org>
Date:   Tue Apr 10 13:19:09 2018 +0200

    script/git-hooks: add check-trailing-whitespace
    
    Signed-off-by: Ralph Boehme <slow at samba.org>
    Reviewed-by: Martin Schwenke <martin at meltin.net>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Thu Apr 26 03:54:39 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[453(2309)/500 at 17m48s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[454(2310)/500 at 17m48s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[455(2311)/500 at 17m48s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[456(2312)/500 at 17m48s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[457(2313)/500 at 17m48s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[458(2314)/500 at 17m48s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[459(2315)/500 at 17m48s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[460(2316)/500 at 17m48s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[461(2317)/500 at 17m48s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[462(2318)/500 at 17m48s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[463(2319)/500 at 17m48s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[464(2320)/500 at 17m48s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[465(2321)/500 at 17m49s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[466(2322)/500 at 17m49s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[467(2323)/500 at 17m49s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[468(2324)/500 at 17m55s] samba.ntlm_auth.diagnostics(nt4_dc:local)(nt4_dc:local)
[469(2325)/500 at 17m55s] samba.ntlm_auth.(nt4_dc:local)(nt4_dc:local)
[470(2344)/500 at 17m56s] samba.wbinfo_simple.ping(nt4_member:local)
[471(2345)/500 at 17m56s] samba.wbinfo_simple.separator(nt4_member:local)
[472(2346)/500 at 17m56s] samba.wbinfo_simple.own-domain(nt4_member:local)
[473(2347)/500 at 17m57s] samba.wbinfo_simple.all-domains(nt4_member:local)
[474(2348)/500 at 17m57s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[475(2349)/500 at 17m57s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[476(2350)/500 at 17m57s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[477(2351)/500 at 17m57s] samba.wbinfo_simple.online-status(nt4_member:local)
[478(2352)/500 at 17m57s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[479(2353)/500 at 17m57s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[480(2354)/500 at 17m57s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_member:local)
UNEXPECTED(failure): samba.wbinfo_simple.check-secret.domain=SAMBA-TEST.wbinfo(nt4_member:local)
REASON: Exception: Exception: wbcCheckTrustCredentials(SAMBA-TEST): error code was NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND (0xc0000233)
failed to call wbcCheckTrustCredentials: WBC_ERR_AUTH_ERROR
Could not check secret
checking the trust secret for domain SAMBA-TEST via RPC calls failed

FAILED (1 failures, 0 errors and 0 unexpected successes in 0 testsuites)

A summary with detailed information can be found in:
  ./bin/ab/summary
TOP 10 slowest tests
samba3.raw.notify(nt4_dc) -> 98
samba3.smb2.notify(nt4_dc) -> 79
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 62
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 60
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
samba3.smb2.lease(nt4_dc) -> 45
samba3.raw.oplock(nt4_dc) -> 42
samba3.smb2.oplock(nt4_dc) -> 41
samba3.raw.search(nt4_dc) -> 34
samba3.blackbox.net.rpc.conf(nt4_dc) -> 32
ERROR: test failed with exit code 1