[Samba] File remains locked on samba server after client crashed

[Christoph Peus]

Hello experts,

we have encountered this problem several times with different samba 
versions (3.0.20b now) and need a solution now which works without 
restarting the samba server: sometimes when a client crashes for 
whatever reason while it has a file on the samba server opened, this 
file cannot be opened for writing after the client has rebootet. The 
locking entry is then associated with a nonexistent pid.
What's the cause of this problem? How can we make this file r/w 
accessible again without restart of the samba server (and deletion of 
the locking.tdb file)?

Thanks in advance!

Christoph