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-184/2019-06-04-1016/flakey.log

The failure seems to be in the "samba-ad-dc-2" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-06-04-1016/samba-ad-dc-2.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-06-04-1016/samba-ad-dc-2.stdout
  
The top commit at the time of the failure was:

commit eb2e29c354ceb7ffe3bcc786929006a6cf9b13ea
Author: Anoop C S <anoopcs at redhat.com>
Date:   Wed May 29 11:40:55 2019 +0530

    s3-smbcontrol: Replace && with || to declare variables in do_sleep()
    
    --enable-developer internally use --enable-selftest alongside. But when
    configured only with --enable-selftest the following code block becomes
    invalid:
    
     #if defined(DEVELOPER) && defined(ENABLE_SELFTEST)
            unsigned int seconds;
            long input;
            const long MAX_SLEEP = 60 * 60; /* One hour maximum sleep */
     #endif
    
    making those variables undeclared for further use. Therefore replace &&
    with || to have those variables declared with --enable-selftest
    configure option.
    
    Signed-off-by: Anoop C S <anoopcs at redhat.com>
    Reviewed-by: Ralph Boehme <slow at samba.org>
    Reviewed-by: Alexander Bokovoy <ab at samba.org>
    
    Autobuild-User(master): Ralph Böhme <slow at samba.org>
    Autobuild-Date(master): Fri May 31 20:38:09 UTC 2019 on sn-devel-184

and the last 50 lines of the stdout log were:

Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
Waiting for dns_update_cache to be filled...
SAMBA LOG of: RODC pid 2717853
samba version 4.11.0pre1-DEVELOPERBUILD started.
Copyright Andrew Tridgell and the Samba Team 1992-2019
binary_smbd_main: samba PID 2717853 was called with maxruntime 18000 - current ts 1559643182
binary_smbd_main: samba: using 'standard' process model
Attempting to autogenerate TLS self-signed keys for https for hostname 'RODC.samba.example.com'
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: Failed to create /m/autobuild/fl/b1522779/prefix/samba-ad-dc-2/var/cores for user 0 with mode 0700
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: Unable to setup corepath for winbindd: No such file or directory
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: Failed to create /m/autobuild/fl/b1522779/prefix/samba-ad-dc-2/var/cores for user 0 with mode 0700
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: Unable to setup corepath for winbindd: No such file or directory
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: winbindd version 4.11.0pre1-DEVELOPERBUILD started.
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: Copyright Andrew Tridgell and the Samba Team 1992-2019
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: initialize_winbindd_cache: clearing cache and re-creating with version number 2
/memdisk/autobuild/fl/b1522779/samba-ad-dc-2/bin/winbindd: daemon_ready: daemon 'winbindd' finished starting up and ready to serve connections
TLS self-signed keys generated OK
Doing a full scan on DC=ForestDnsZones,DC=samba,DC=example,DC=com and looking for deleted objects
Doing a full scan on DC=DomainDnsZones,DC=samba,DC=example,DC=com and looking for deleted objects
Doing a full scan on DC=samba,DC=example,DC=com and looking for deleted objects
Doing a full scan on CN=Configuration,DC=samba,DC=example,DC=com and looking for deleted objects
dnsupdate_nameupdate_done: Failed DNS update with exit code 110
samba_parent_shutdown: samba_shutdown of samba 2717853: from 2745919
[1(0)/67 at 0s] samba.tests.dns(rodc:local)
ERROR: Testsuite[samba.tests.dns(rodc:local)]
REASON: unable to set up environment rodc:local - exiting



FAILED (0 failures, 0 errors and 0 unexpected successes in 1 testsuites)

A summary with detailed information can be found in:
  ./bin/ab/summary
TOP 10 slowest tests
samba.tests.dns(rodc:local) -> 0
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed