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-184/2019-03-18-1001/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-184/2019-03-18-1001/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-03-18-1001/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 1375e08580d642c069170e3e3bddc690bf3c5e89
Author: David Disseldorp <ddiss at samba.org>
Date:   Tue Mar 12 18:49:09 2019 +0100

    smbd: fix check_parent_access() talloc stackframe leaks
    
    check_parent_access() currently leaks a number of allocations onto the
    talloc_tos() context in both success and error paths.
    
    Signed-off-by: David Disseldorp <ddiss at samba.org>
    Reviewed-by: Volker Lendecke <vl at samba.org>
    
    Autobuild-User(master): David Disseldorp <ddiss at samba.org>
    Autobuild-Date(master): Fri Mar 15 11:32:04 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[542(2479)/586 at 24m55s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[543(2480)/586 at 24m55s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[544(2481)/586 at 24m55s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[545(2482)/586 at 24m55s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[546(2483)/586 at 24m55s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[547(2484)/586 at 24m55s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[548(2485)/586 at 24m55s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[549(2486)/586 at 24m56s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[550(2487)/586 at 24m56s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[551(2488)/586 at 24m56s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[552(2489)/586 at 24m56s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[553(2490)/586 at 24m56s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[554(2491)/586 at 24m56s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[555(2492)/586 at 24m56s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[556(2493)/586 at 24m57s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[557(2494)/586 at 25m4s] samba.tests.ntlm_auth(nt4_dc:local)
[558(2507)/586 at 25m6s] samba.wbinfo_simple.ping(nt4_member:local)
[559(2508)/586 at 25m7s] samba.wbinfo_simple.separator(nt4_member:local)
[560(2509)/586 at 25m7s] samba.wbinfo_simple.own-domain(nt4_member:local)
[561(2510)/586 at 25m7s] samba.wbinfo_simple.all-domains(nt4_member:local)
[562(2511)/586 at 25m7s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[563(2512)/586 at 25m7s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[564(2513)/586 at 25m7s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[565(2514)/586 at 25m7s] samba.wbinfo_simple.online-status(nt4_member:local)
[566(2515)/586 at 25m8s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[567(2516)/586 at 25m8s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[568(2517)/586 at 25m8s] samba.wbinfo_simple.check-secret.domain=$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) -> 103
samba3.smb2.notify(nt4_dc) -> 82
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 61
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 60
samba3.blackbox.net.rpc.conf(nt4_dc) -> 54
samba3.smb2.compound_find(nt4_dc) -> 50
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
samba3.raw.search(nt4_dc) -> 47
samba3.smb2.compound_find(nt4_dc) -> 46
samba3.smb2.lease(nt4_dc) -> 45
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed