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-144/2019-02-08-1926/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-144/2019-02-08-1926/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-02-08-1926/samba.stdout
  
The top commit at the time of the failure was:

commit 8a8286842d8770df322c4493632496341d707f0c
Author: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
Date:   Thu Feb 7 17:36:02 2019 +1300

    s4/registry/py: use unsigned ParseTuple format for unsigned value
    
    Signed-off-by: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
    Reviewed-by: Noel Power <npower at samba.org>
    
    Autobuild-User(master): Noel Power <npower at samba.org>
    Autobuild-Date(master): Fri Feb  8 17:09:51 CET 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[252(932)/853 at 44m14s] samba4.rpc.lsa on ncalrpc with bigendian(ad_dc_ntvfs:local)
[253(933)/853 at 44m17s] samba4.rpc.dssetup on ncalrpc with bigendian(ad_dc_ntvfs:local)
[254(934)/853 at 44m18s] samba4.rpc.altercontext on ncalrpc with bigendian(ad_dc_ntvfs:local)
smbtorture 4.11.0pre1-DEVELOPERBUILD
WARNING: The "lsa over netlogon" option is deprecated
WARNING: The "server schannel" option is deprecated
Using seed 1549650268
opening LSA connection
Testing change of primary context

Testing OpenPolicy2
Testing change of primary context
Opening secondary DSSETUP context
Testing change of primary context
Opening bad secondary connection
Testing DSSETUP pipe operations
dcerpc_dssetup_DsRoleGetPrimaryDomainInformation level 1
dcerpc_dssetup_DsRoleGetPrimaryDomainInformation level 2
dcerpc_dssetup_DsRoleGetPrimaryDomainInformation level 3

Testing Close

Testing change of primary context

Testing OpenPolicy2

Testing Close

Testing change of primary context

Testing OpenPolicy2
UNEXPECTED(failure): samba4.rpc.altercontext on ncalrpc with bigendian.altercontext(ad_dc_ntvfs:local)
REASON: Exception: Exception: ../../source4/torture/rpc/lsa.c:188: status was NT_STATUS_CONNECTION_RESET, expected NT_STATUS_CONNECTION_DISCONNECTED: OpenPolicy2 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
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 307
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 151
idmap.rfc2307(ad_member_rfc2307) -> 135
samba4.drs.rpc.dssync on ncacn_ip_tcp with validate(ad_dc_ntvfs) -> 74
samba4.ldb.ldap with options '-U"$USERNAME%$PASSWORD"  --option=clientldapsaslwrapping=plain'(ad_dc_ntvfs)(ad_dc_ntvfs) -> 68
samba4.ldb.ldap with options '-U"$USERNAME%$PASSWORD" -k yes --option=clientldapsaslwrapping=plain'(ad_dc_ntvfs)(ad_dc_ntvfs) -> 65
samba3.smb2.compound_find vfs_aio_pthread_async_dosmode_force_sync2(simpleserver) -> 62
samba4.drs.rpc.msDSIntId on ncacn_ip_tcp with validate(ad_dc_ntvfs) -> 61
samba3.smb2.compound_find vfs_aio_pthread_async_dosmode_default2(simpleserver) -> 60
samba4.rpc.schannel on ncacn_ip_tcp with seal,padcheck(ad_dc_ntvfs) -> 60
ERROR: test failed with exit code 1