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-144/2019-03-24-0658/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-144/2019-03-24-0658/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-03-24-0658/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 7841c62ae4caeaa7bc13e7c6b8b930da7c22c97f
Author: Volker Lendecke <vl at samba.org>
Date:   Tue Mar 19 16:08:43 2019 +0100

    rpc_server3: Add a \n to a DEBUG message
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Fri Mar 22 19:02:32 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[543(2516)/588 at 22m38s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_dc:local)
[544(2517)/588 at 22m39s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[545(2518)/588 at 22m39s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[546(2519)/588 at 22m39s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[547(2520)/588 at 22m39s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[548(2521)/588 at 22m39s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[549(2522)/588 at 22m39s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[550(2523)/588 at 22m39s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[551(2524)/588 at 22m39s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[552(2525)/588 at 22m40s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[553(2526)/588 at 22m40s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[554(2527)/588 at 22m40s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[555(2528)/588 at 22m40s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[556(2529)/588 at 22m40s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[557(2530)/588 at 22m40s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[558(2531)/588 at 22m40s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[559(2532)/588 at 22m48s] samba.tests.ntlm_auth(nt4_dc:local)
[560(2545)/588 at 22m50s] samba.wbinfo_simple.ping(nt4_member:local)
[561(2546)/588 at 22m50s] samba.wbinfo_simple.separator(nt4_member:local)
[562(2547)/588 at 22m51s] samba.wbinfo_simple.own-domain(nt4_member:local)
[563(2548)/588 at 22m51s] samba.wbinfo_simple.all-domains(nt4_member:local)
[564(2549)/588 at 22m51s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[565(2550)/588 at 22m51s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[566(2551)/588 at 22m51s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[567(2552)/588 at 22m51s] samba.wbinfo_simple.online-status(nt4_member:local)
[568(2553)/588 at 22m51s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[569(2554)/588 at 22m51s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[570(2555)/588 at 22m52s] samba.wbinfo_simple.check-secret.domain=$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) -> 102
samba3.smb2.notify(nt4_dc) -> 84
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 61
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 60
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
samba3.smb2.compound_find(nt4_dc) -> 49
samba3.smb2.lease(nt4_dc) -> 46
samba3.smb2.compound_find(nt4_dc) -> 45
samba3.raw.search(nt4_dc) -> 43
samba3.raw.oplock(nt4_dc) -> 43
ERROR: test failed with exit code 1