- Red Hat Enterprise Linux 6
- Printers loosing driver information and ntprinters.tdb loosing records after restart or reload samba while cups is stopped. How to solve it?
If you are sharing printers via samba every time you restart or reload smd service, samba will query Cups to obtain information about all printers and its configuration. So, it is not a good idea to restart samba that is sharing printers if Cups is stopped.
Also, is important to remember to start Cups service before you start samba, due the dependency between these services.
However, it is considered a bug due ntprinters.tdb must not loose current records even if Cups is stopped and samba can not obtain printer's information.
The expected behavior is not remove or delete printer information if cups is stopped and doesn't return any data to samba service.
This problem is already fixed in samba-3.5.10-99 (available in RHEL 6.2). So, the permanent fix is update samba package for latest version or at least samba-3.5.10-99.
Cups is stopped and do not return any data to samba. Then, samba alters ntprinters.tdb improperly.
To reproduce the issue you just need to perforn the sequence of commands bellow:
Check .tdb records BEFORE the restart/reload sequence of commands:
samba \# tdbtool ntprinters.tdb tdb> info 1179 records totalling 6097884 bytes tdb> check Database integrity is OK and has 1179 records. tdb>
Stop Cups and restart/reload samba:
#service cups stop #service smb reload #service smb restart #service cups start #service smb restart
Check .tdb again and the records dissapeared:
samba \# tdbtool ntprinters.tdb.problem tdb> info 606 records totalling 208150 bytes tdb> check Database integrity is OK and has 606 records. tdb> q
We can also notice the difference in the file size:
Backup files ok:
28M -rw\---\----. 1 root root 28M Aug 18 15:30 ntprinters.tdb.20110818-1530 28M -rw\---\----. 1 root root 28M Aug 18 16:00 ntprinters.tdb.20110818-1600
After reload/restart samba with cups stopped file size is samaller than before:
1.9M -rw\---\----. 1 root root 1.8M Aug 18 15:30 ntprinters.tdb.20110818-1530 1.9M -rw\---\----. 1 root root 1.8M Aug 18 16:00 ntprinters.tdb.20110818-1600
- Red Hat Enterprise Linux
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