A too many open files problems

[Kevin Huang]

Hi Volker,

       After the client finish to write the file to the server, it send
"Close Request" on each file. My clinet is Win7.
       And it is interesting when the client exit "aaaa" this folder, then
the samba will release all file handles in the folder.
       If I want to trace this issue, which function is the start?

BRs,
Kevin Huang


2013/10/22 Volker Lendecke <Volker.Lendecke at sernet.de>

> On Tue, Oct 22, 2013 at 02:39:44PM +0800, Kevin Huang wrote:
> > Hi,
> >
> >       I try to copy 50000 files to a floder that I create on my Freebsd
> 9.1
> > samba 4.0.8 system.
> >       That would fail with the the message "Too many open files, unable
> to
> > open more!  smbd's max open files = 16384".
> >
> >   Too many open files, unable to open more!  smbd's max open files =
> 16384
> > [2013/10/22 14:14:58.578522,  0] ../source3/smbd/open.c:340(fd_open)
> >
> >        So I do a test I create a floder. And I just enter this folder.
> > There are there files on this folder.
> >        Then I command "losf -p pid".  I see the three files were still
> > holded by the process, although I don't open them.
> >
> > smbd    66082 root   46r    VREG               0,89      3894 3797927
> > /usr/home/gino1/share/aaa/aaaa/conn_idle.c
> > smbd    66082 root   47r    VREG               0,89     35349 3797928
> > /usr/home/gino1/share/aaa/aaaa/close.c
> > smbd    66082 root   49r    VREG               0,89      8442 3797929
> > /usr/home/gino1/share/aaa/aaaa/conn.c
> >         So if I try to copy 50000 files to a new folder again, I see the
> > files that were holded by the process grow up.
> >
> >         Why the samba should keep these file handle?
>
> Samba should not keep files open longer than the client
> requests it to. So either your client program keeps the
> files open much longer than needed or we have a bug in
> Samba. We need a network trace of the operation first to see
> if the client closes the files. If it does, we need to look
> at strace/ktrace/debug logs why Samba would not close the
> files.
>
> With best regards,
>
> Volker Lendecke
>
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