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-144/2018-04-11-2001/flakey.log

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

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-11-2001/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-11-2001/samba.stdout
  
The top commit at the time of the failure was:

commit 212815969f4a706bc8395e2f6dbf225318ff2ad7
Author: Volker Lendecke <vl at samba.org>
Date:   Wed Apr 11 10:42:21 2018 +0200

    rpc_server: Init local_server_* in make_internal_rpc_pipe_socketpair
    
    Bug: https://bugzilla.samba.org/show_bug.cgi?id=13370
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Stefan Metzmacher <metze at samba.org>
    
    Autobuild-User(master): Volker Lendecke <vl at samba.org>
    Autobuild-Date(master): Wed Apr 11 15:19:19 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[732(3913)/831 at 59m26s] samba.tests.emulate.traffic(ad_dc_ntvfs)
[733(3915)/831 at 59m26s] samba.tests.emulate.traffic_packet(ad_dc_ntvfs)
[734(4004)/831 at 1h45s] samba.tests.blackbox.traffic_replay(ad_dc_ntvfs)
[735(4010)/831 at 1h57s] samba.tests.blackbox.traffic_learner(ad_dc_ntvfs)
[736(4012)/831 at 1h57s] samba.tests.blackbox.traffic_summary(ad_dc_ntvfs)
[737(4012)/831 at 1h57s] samba.tests.blackbox.smbcontrol(ad_dc_ntvfs:local)
[738(4014)/831 at 1h1m4s] samba.tests.blackbox.smbcontrol(promoted_dc:local)
[739(4016)/831 at 1h1m6s] samba4.ldap.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[740(4055)/831 at 1h1m18s] samba4.tokengroups.krb5.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[741(4065)/831 at 1h1m28s] samba4.tokengroups.ntlm.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[742(4074)/831 at 1h1m36s] samba4.sam.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[743(4091)/831 at 1h1m41s] samba4.user_account_control.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[744(4102)/831 at 1h1m56s] samba4.schemaInfo.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[745(4104)/831 at 1h2m0s] samba.tests.dsdb_schema_attributes(ad_dc_ntvfs:local)
[746(4109)/831 at 1h2m19s] samba4.urgent_replication.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[747(4117)/831 at 1h2m23s] samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[748(4141)/831 at 1h4m4s] samba4.ldap.match_rules.python(ad_dc_ntvfs)
[749(4175)/831 at 1h4m37s] samba4.ldap.notification.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[750(4178)/831 at 1h4m46s] samba4.ldap.sites.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[751(4189)/831 at 1h4m54s] samba4.ldap.sort.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[752(4196)/831 at 1h5m5s] samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[753(4211)/831 at 1h17m29s] samba4.ldap.linked_attributes.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[754(4231)/831 at 1h17m36s] samba4.ldap.rodc.python(rodc)(rodc)
[755(4237)/831 at 1h17m39s] samba4.ldap.rodc_rwdc.python(rodc)(rodc:local)
[756(4257)/831 at 1h25m52s] samba4.drs.replica_sync_rodc.python(rodc)(rodc:local)
[757(4259)/831 at 1h26m1s] samba4.ldap_schema.python(ad_dc_ntvfs)(ad_dc_ntvfs)
UNEXPECTED(error): samba4.ldap_schema.python(ad_dc_ntvfs).__main__.SchemaTests.test_generated_mAPIID(ad_dc_ntvfs)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b3420099/samba/source4/dsdb/tests/python/ldap_schema.py", line 1173, in test_generated_mAPIID
    self.ldb.modify_ldif(ldif)
  File "bin/python/samba/__init__.py", line 240, in modify_ldif
    self.modify(msg, controls)
LdbError: (3, 'ldb_wait from (null) with LDB_WAIT_ALL: Time limit exceeded (3)')

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

A summary with detailed information can be found in:
  ./bin/ab/summary
TOP 10 slowest tests
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 744
samba4.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 492
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 225
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 202
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 152
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 138
samba4.raw.notify(ad_dc_ntvfs) -> 106
samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 101
samba4.rpc.samlogon on ncacn_np with (ad_dc_ntvfs) -> 94
idmap.rfc2307(ad_member_rfc2307) -> 82
ERROR: test failed with exit code 1