autobuild[sn-devel-184]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-184) 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-184/2019-05-18-1606/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-184/2019-05-18-1606/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-05-18-1606/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 0b8b04dbd3f053f11da15a8f28bbd5cbd9f4d48b
Author: Andreas Schneider <asn at samba.org>
Date:   Thu May 16 08:31:40 2019 +0200

    lib:util: Add a test for byteorder.h
    
    Signed-off-by: Andreas Schneider <asn at samba.org>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Fri May 17 20:44:36 UTC 2019 on sn-devel-184

and the last 50 lines of the stdout log were:

[545(2507)/589 at 28m33s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[546(2508)/589 at 28m33s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[547(2509)/589 at 28m33s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[548(2510)/589 at 28m34s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[549(2511)/589 at 28m34s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[550(2512)/589 at 28m34s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[551(2513)/589 at 28m34s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[552(2514)/589 at 28m34s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[553(2515)/589 at 28m34s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[554(2516)/589 at 28m34s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[555(2517)/589 at 28m35s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[556(2518)/589 at 28m35s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[557(2519)/589 at 28m35s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[558(2520)/589 at 28m35s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[559(2521)/589 at 28m35s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[560(2522)/589 at 28m43s] samba.tests.ntlm_auth(nt4_dc:local)
[561(2535)/589 at 28m45s] samba.wbinfo_simple.ping(nt4_member:local)
[562(2536)/589 at 28m45s] samba.wbinfo_simple.separator(nt4_member:local)
[563(2537)/589 at 28m45s] samba.wbinfo_simple.own-domain(nt4_member:local)
[564(2538)/589 at 28m46s] samba.wbinfo_simple.all-domains(nt4_member:local)
[565(2539)/589 at 28m46s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[566(2540)/589 at 28m46s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[567(2541)/589 at 28m46s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[568(2542)/589 at 28m46s] samba.wbinfo_simple.online-status(nt4_member:local)
[569(2543)/589 at 28m46s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[570(2544)/589 at 28m46s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[571(2545)/589 at 28m46s] samba.wbinfo_simple.check-secret.domain=$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.smb2.lease(nt4_dc) -> 159
samba3.raw.notify(nt4_dc) -> 106
samba3.smb2.oplock(nt4_dc) -> 103
samba3.smb2.notify(nt4_dc) -> 83
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 61
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 60
samba3.smb2.compound_find(nt4_dc) -> 57
samba3.smb2.compound_find(nt4_dc) -> 53
samba3.blackbox.net.rpc.conf(nt4_dc) -> 51
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed