[Samba] closed connection to service xxx

[Richard Huber]

Hello,

Sorry to bother all with this simple configuration question,

Little background:
I recently migrated our samba server from Ubuntu 9.04 to Ubuntu 14.04.1.LTS.
Migration was done like this: moving conf-files from the old server to 
the new one.
My samba server is member of a windows domain, that is controlled by a 
Domain Controller running Windows Server 2008.
We have three types of shares, "common", "user" and "nov"

On our common-share, I created a document with MS Word (Windows 7-client):

$ sudo smbstatus | grep .doc
WARNING: The "idmap uid" option is deprecated
WARNING: The "idmap gid" option is deprecated
14285        10028      DENY_WRITE 0x12019f    RDWR NONE             
/mnt/storage/share/common   New Microsoft Office Word Document.docx   
Fri Mar  6 09:29:04 2015

I kept word running and after 1½ hours these messages appears in the log:

$ tail -f /var/log/samba/log.myIP
[2015/03/06 11:04:31.126911,  1] ../source3/smbd/service.c:1122(close_cnum)
   myIP (ipv4:myIP:59614) closed connection to service common
[2015/03/06 11:04:31.127220,  1] ../source3/smbd/service.c:1122(close_cnum)
   myIP (ipv4:myIP:59614) closed connection to service richard.huber
[2015/03/06 11:04:31.576273,  1] 
../source3/param/loadparm.c:3178(lp_do_parameter)
   WARNING: The "idmap uid" option is deprecated
[2015/03/06 11:04:31.576487,  1] 
../source3/param/loadparm.c:3178(lp_do_parameter)
   WARNING: The "idmap gid" option is deprecated

$ sudo smbstatus | grep .doc
WARNING: The "idmap uid" option is deprecated
WARNING: The "idmap gid" option is deprecated

File handle seems to be closed, even though word is still running with 
the file opened.
When I press save in Word the file reappears in smbstatus:

$ sudo smbstatus | grep .doc
WARNING: The "idmap uid" option is deprecated
WARNING: The "idmap gid" option is deprecated
32007        10028      DENY_WRITE 0x12019f    RDWR NONE             
/mnt/storage/share/common   New Microsoft Office Word Document.docx   
Fri Mar  6 12:32:30 2015

Any ideas how to resolve this problem?

/Richard