Kprop Eating Disk Space?

[Ken Raeburn]

Ken Raeburn <raeburn at MIT.EDU> writes:

> Monica Lau <mllau2002 at yahoo.com> writes:
>> I have a master kdc and a slave kdc.  In the master kdc, I run a
>> script that executes kprop to propagate the database to the slave
>> every 2 seconds (for testing purposes).  On the slave kdc, I run the
>> "df" command periodically.  I noticed that the disk space percentage
>> usage climbs up slowly.  Eventually, it goes up to 100%, and my
>> slave machine crashes.  I don't understand how/why kprop could cause
>> the disk space in the slave machine to go up because the master
>> database is always the same size.  If I stop the propagation, the
>> disk space in the slave doesn't go down, until I reboot the machine.
>
> It sounds like unreferenced files being kept around for some reason.
> Try looking for old processes hanging around for some reason (is
> kpropd not exiting properly?), or get the "lsof" tool and use it to
> see what processes might have extra files kept open.

Someone here pointed out the "every 2 seconds" part that I overlooked.
Trying it out like that, I think I've reproduced the problem.  I'll
investigate further.

> Roughly, it goes like this on the slave side:
>  - kpropd gets a connection
>  - data is saved (default: $localstatedir/krb5kdc/slave_datatrans)

Actually, slave_datatrans is on the master side.  It's from_master on
the slave.

Ken