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-144/2018-04-01-0040/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-144/2018-04-01-0040/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-01-0040/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 6b75d2c650aa9ee632122fa87ea8a2a98f1fa613
Author: Amitay Isaacs <amitay at gmail.com>
Date:   Thu Mar 29 10:45:19 2018 +1100

    ctdb-scripts: Drop "net serverid wipe" from 50.samba event script
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13359
    
    There is no serverid database anymore.
    
    Signed-off-by: Amitay Isaacs <amitay at gmail.com>
    Reviewed-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Martin Schwenke <martin at meltin.net>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Sat Mar 31 08:34:00 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[452(2296)/499 at 22m14s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[453(2297)/499 at 22m14s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[454(2298)/499 at 22m15s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[455(2299)/499 at 22m15s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[456(2300)/499 at 22m15s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[457(2301)/499 at 22m15s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[458(2302)/499 at 22m15s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[459(2303)/499 at 22m16s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[460(2304)/499 at 22m16s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[461(2305)/499 at 22m16s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[462(2306)/499 at 22m16s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[463(2307)/499 at 22m16s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[464(2308)/499 at 22m17s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[465(2309)/499 at 22m17s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[466(2310)/499 at 22m17s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[467(2311)/499 at 22m26s] samba.ntlm_auth.diagnostics(nt4_dc:local)(nt4_dc:local)
[468(2312)/499 at 22m26s] samba.ntlm_auth.(nt4_dc:local)(nt4_dc:local)
[469(2331)/499 at 22m28s] samba.wbinfo_simple.ping(nt4_member:local)
[470(2332)/499 at 22m28s] samba.wbinfo_simple.separator(nt4_member:local)
[471(2333)/499 at 22m28s] samba.wbinfo_simple.own-domain(nt4_member:local)
[472(2334)/499 at 22m28s] samba.wbinfo_simple.all-domains(nt4_member:local)
[473(2335)/499 at 22m28s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[474(2336)/499 at 22m28s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[475(2337)/499 at 22m28s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[476(2338)/499 at 22m28s] samba.wbinfo_simple.online-status(nt4_member:local)
[477(2339)/499 at 22m28s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[478(2340)/499 at 22m29s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[479(2341)/499 at 22m29s] samba.wbinfo_simple.check-secret.domain=$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) -> 98
samba3.smb2.notify(nt4_dc) -> 79
samba3.blackbox.net.rpc.conf(nt4_dc) -> 72
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 61
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 60
samba3.blackbox.net.local.conf(nt4_dc:local) -> 59
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
samba3.smb2.lease(nt4_dc) -> 44
samba3.smb2.oplock(nt4_dc) -> 42
samba3.raw.oplock(nt4_dc) -> 42
ERROR: test failed with exit code 1