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-144/2018-10-16-0651/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-144/2018-10-16-0651/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-10-16-0651/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 2fc855e7d2458249ca6fc8ffdf1d7633ab84cc55
Author: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
Date:   Thu Oct 11 11:59:52 2018 +1300

    samba-tool drs showrepl: do not crash if no dnsHostName found
    
    This should not happen, but it does sometimes in an autobuild
    environment. Rather than reporting this by crashing, we report it by
    showing there is no DNS name.
    
    Signed-off-by: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
    
    Autobuild-User(master): Douglas Bagnall <dbagnall at samba.org>
    Autobuild-Date(master): Fri Oct 12 15:27:07 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[525(2440)/571 at 21m15s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[526(2441)/571 at 21m16s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[527(2442)/571 at 21m16s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[528(2443)/571 at 21m16s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[529(2444)/571 at 21m16s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[530(2445)/571 at 21m16s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[531(2446)/571 at 21m16s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[532(2447)/571 at 21m16s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[533(2448)/571 at 21m16s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[534(2449)/571 at 21m16s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[535(2450)/571 at 21m16s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[536(2451)/571 at 21m16s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[537(2452)/571 at 21m16s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[538(2453)/571 at 21m16s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[539(2454)/571 at 21m17s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[540(2455)/571 at 21m23s] samba.ntlm_auth.diagnostics(nt4_dc:local)(nt4_dc:local)
[541(2456)/571 at 21m23s] samba.ntlm_auth.(nt4_dc:local)(nt4_dc:local)
[542(2475)/571 at 21m24s] samba.wbinfo_simple.ping(nt4_member:local)
[543(2476)/571 at 21m24s] samba.wbinfo_simple.separator(nt4_member:local)
[544(2477)/571 at 21m24s] samba.wbinfo_simple.own-domain(nt4_member:local)
[545(2478)/571 at 21m24s] samba.wbinfo_simple.all-domains(nt4_member:local)
[546(2479)/571 at 21m24s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[547(2480)/571 at 21m25s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[548(2481)/571 at 21m25s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[549(2482)/571 at 21m25s] samba.wbinfo_simple.online-status(nt4_member:local)
[550(2483)/571 at 21m25s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[551(2484)/571 at 21m25s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[552(2485)/571 at 21m25s] samba.wbinfo_simple.check-secret.domain=$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) -> 82
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) -> 56
samba3.smb2.compound_find(nt4_dc) -> 53
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
samba3.smb2.lease(nt4_dc) -> 45
samba3.raw.oplock(nt4_dc) -> 44
samba3.smb2.oplock(nt4_dc) -> 42
ERROR: test failed with exit code 1