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-184/2019-04-25-0957/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-184/2019-04-25-0957/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-04-25-0957/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 94f2ed3eb35b94d5152578dbb6d5ee8f2fa2da69
Author: Christof Schmitt <cs at samba.org>
Date:   Wed Apr 24 10:16:30 2019 -0700

    wscript: Remove checks for shm_open and shmget
    
    Commit 74a16a1094278 "s3:smbprofile: Replace sysv shmem with tdb"
    removed the usage of the shared memory segment for profiling data. As
    there are no other users of shared memory segments, remove the configure
    check for these functions.
    
    Signed-off-by: Christof Schmitt <cs at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Thu Apr 25 00:54:16 UTC 2019 on sn-devel-184

and the last 50 lines of the stdout log were:

[545(2504)/589 at 27m17s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[546(2505)/589 at 27m17s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[547(2506)/589 at 27m17s] samba.wbinfo_simple.change-secret.domain=$DOMAIN(nt4_dc:local)
[548(2507)/589 at 27m17s] samba.wbinfo_simple.check-secret.domain=$DOMAIN(nt4_dc:local)
[549(2508)/589 at 27m17s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_dc:local)
[550(2509)/589 at 27m18s] samba.wbinfo_simple.domain-users(nt4_dc:local)
[551(2510)/589 at 27m18s] samba.wbinfo_simple.domain-groups(nt4_dc:local)
[552(2511)/589 at 27m18s] samba.wbinfo_simple.name-to-sid=$DC_USERNAME(nt4_dc:local)
[553(2512)/589 at 27m18s] samba.wbinfo_simple.name-to-sid=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[554(2513)/589 at 27m18s] samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[555(2514)/589 at 27m18s] samba.wbinfo_simple.user-groups=$DOMAIN/$DC_USERNAME(nt4_dc:local)
[556(2515)/589 at 27m18s] samba.wbinfo_simple.authenticate=$DOMAIN/$DC_USERNAME%$DC_PASSWORD(nt4_dc:local)
[557(2516)/589 at 27m19s] samba.wbinfo_simple.allocate-uid(nt4_dc:local)
[558(2517)/589 at 27m19s] samba.wbinfo_simple.allocate-gid(nt4_dc:local)
[559(2518)/589 at 27m19s] samba.wbinfo_sids2xids.(nt4_dc:local)(nt4_dc:local)
[560(2519)/589 at 27m27s] samba.tests.ntlm_auth(nt4_dc:local)
[561(2532)/589 at 27m29s] samba.wbinfo_simple.ping(nt4_member:local)
[562(2533)/589 at 27m30s] samba.wbinfo_simple.separator(nt4_member:local)
[563(2534)/589 at 27m30s] samba.wbinfo_simple.own-domain(nt4_member:local)
[564(2535)/589 at 27m30s] samba.wbinfo_simple.all-domains(nt4_member:local)
[565(2536)/589 at 27m30s] samba.wbinfo_simple.trusted-domains(nt4_member:local)
[566(2537)/589 at 27m30s] samba.wbinfo_simple.domain-info=BUILTIN(nt4_member:local)
[567(2538)/589 at 27m30s] samba.wbinfo_simple.domain-info=$DOMAIN(nt4_member:local)
[568(2539)/589 at 27m30s] samba.wbinfo_simple.online-status(nt4_member:local)
[569(2540)/589 at 27m31s] samba.wbinfo_simple.online-status.domain=BUILTIN(nt4_member:local)
[570(2541)/589 at 27m31s] samba.wbinfo_simple.online-status.domain=$DOMAIN(nt4_member:local)
[571(2542)/589 at 27m31s] samba.wbinfo_simple.check-secret.domain=$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) -> 104
samba3.smb2.oplock(nt4_dc) -> 102
samba3.smb2.notify(nt4_dc) -> 85
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 62
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 61
samba3.smb2.compound_find(nt4_dc) -> 55
samba3.blackbox.net.rpc.conf(nt4_dc) -> 50
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 49
samba3.smb2.compound_find(nt4_dc) -> 47
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed