[Libguestfs] guestfsd crashes when the handle is closed

[Richard W.M. Jones]

On Wed, May 14, 2014 at 06:07:37PM +0200, Safa Rekik wrote:
> Hello,
> 
> I launched guestfsd in my guest with this command : guestfsd* -rv*.
> When i close the handle the deamon crashes.
> 
> This is the output i got (Deamon side) :
>                              guestfsd: main_loop : new request, len 0x28
>                              fsync /dev/sda
>                              /dev/sr0 : No medium found
>                              guestfsd : main_loop : proc 282
> (internal_autosynx) took 0.19  seconds
>                              *read: unexpected end of file on fd 3 *
> 
> I got the same error with both ubuntu12.04 and fedora 20 guests. I know
> that in ubuntu the guestfsd version is quite but fedora 20 has 1.26
> libguestfs version i think.

Can you attach a debugger to it and find out where it crashes or
exits.  Something like:

  # gdb /usr/sbin/guestfsd `pidof guestfsd`
  (gdb) break exit
  (gdb) cont
  ... when it exits ...
  (gdb) bt

As discussed on IRC, guestfsd is single-threaded at the moment, but
one of the jobs for 1.28 is to add support for multiple parallel
connections.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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