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-144/2019-02-27-1251/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-144/2019-02-27-1251/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-02-27-1251/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit eb13f70e3740a8e978fe4b90761438392b261485
Author: Andreas Schneider <asn at samba.org>
Date:   Wed Feb 27 08:00:05 2019 +0100

    libcli:auth: Remove unused header file
    
    Signed-off-by: Andreas Schneider <asn at samba.org>
    Reviewed-by: Volker Lendecke <vl at samba.org>
    
    Autobuild-User(master): Volker Lendecke <vl at samba.org>
    Autobuild-Date(master): Wed Feb 27 10:00:32 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[535(2466)/580 at 22m11s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_dc:local)
[536(2467)/580 at 22m11s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[537(2468)/580 at 22m11s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[538(2469)/580 at 22m11s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[539(2470)/580 at 22m11s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[540(2471)/580 at 22m11s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[541(2472)/580 at 22m11s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[542(2473)/580 at 22m11s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[543(2474)/580 at 22m12s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[544(2475)/580 at 22m12s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[545(2476)/580 at 22m12s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[546(2477)/580 at 22m12s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[547(2478)/580 at 22m12s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[548(2479)/580 at 22m12s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[549(2480)/580 at 22m12s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[550(2481)/580 at 22m13s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[551(2482)/580 at 22m19s] samba.tests.ntlm_auth(nt4_dc:local)
[552(2495)/580 at 22m22s] samba.wbinfo_simple.ping(nt4_member:local)
[553(2496)/580 at 22m22s] samba.wbinfo_simple.separator(nt4_member:local)
[554(2497)/580 at 22m22s] samba.wbinfo_simple.own-domain(nt4_member:local)
[555(2498)/580 at 22m22s] samba.wbinfo_simple.all-domains(nt4_member:local)
[556(2499)/580 at 22m22s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[557(2500)/580 at 22m22s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[558(2501)/580 at 22m22s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[559(2502)/580 at 22m22s] samba.wbinfo_simple.online-status(nt4_member:local)
[560(2503)/580 at 22m23s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[561(2504)/580 at 22m23s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[562(2505)/580 at 22m23s] samba.wbinfo_simple.check-secret.domain=$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) -> 101
samba3.smb2.notify(nt4_dc) -> 83
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 62
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 60
samba3.smb2.compound_find(nt4_dc) -> 51
samba3.smb2.compound_find(nt4_dc) -> 50
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
samba3.smb2.lease(nt4_dc) -> 45
samba3.raw.oplock(nt4_dc) -> 43
samba3.raw.search(nt4_dc) -> 43
ERROR: test failed with exit code 1