Re: TFTP spawn issue

[Johnny Billquist <bqt%softjar.se@localhost>]

man tftpd ? :-)

In short, you just run it. Preferrably with the same switches as 
specified in inetd.conf

You probably also want to add the "-d" switch...

As for the 7 requests, it's probably retrying as it isn't getting responses.

The interesting part is probably what you see in the syslog.
I'd need to dig in a bit further to know more in detail, but I don't 
have time for all that fun right now. :-)

        Johnny

On 2012-03-27 17.12, IT geek 31 wrote:
> Hi all,
>
> Thanks for your advice.  I'm inclined to agree with Johnny - something
> isn't right and I don't think increasing the spawn rate is solving the
> issue.
>
> I have turned on debugging for inetd, although I'm no clearer.
>
> When the client boots, it appears as if it's asking for each file 7
> times.  /var/log/messages shows this:
>
> <snip>
> Mar 27 17:06:10 qube1 tftpd[1782]: esxi.mdb.eu.com: read request for
> //esxi50/ehci-ehc.v00: success
> Mar 27 17:06:10 qube1 tftpd[1570]: esxi.mdb.eu.com: read request for
> //esxi50/ehci-ehc.v00: success
> Mar 27 17:06:10 qube1 tftpd[1688]: esxi.mdb.eu.com: read request for
> //esxi50/ehci-ehc.v00: success
> Mar 27 17:06:10 qube1 tftpd[1724]: esxi.mdb.eu.com: read request for
> //esxi50/ehci-ehc.v00: success
> Mar 27 17:06:10 qube1 tftpd[1759]: esxi.mdb.eu.com: read request for
> //esxi50/ehci-ehc.v00: success
> Mar 27 17:06:10 qube1 tftpd[1598]: esxi.mdb.eu.com: read request for
> //esxi50/ehci-ehc.v00: success
> Mar 27 17:06:11 qube1 tftpd[1186]: esxi.mdb.eu.com: read request for
> //esxi50/ehci-ehc.v00: success
> </snip>
>
> The console is outputting this:
>
> <snip>
> 2245 execl /usr/libexec/tftpd
> 2245 reaped, status 0
> restored tftp, fd 5
> someone wants tftp
> </snip>
>
> In the end the client will refuse to boot, and ask to be rebooted.
> /var/log/messages shows this error:
>
> Mar 27 17:07:05 qube1 tftpd[1603]: Received *code 768* in sendfile
> Mar 27 17:07:25 qube1 last message repeated 4 times
>
> Any idea what that means?
>
> I have checked the md5sum of the ISO and unpacked it again - the boot
> files seem good.
>
> Johnny - how do I run TFTP by hand from the command line?
>
> Again, thanks to all for your input,
>
>
> -Mark
>
>
> On 26 March 2012 21:47, Johnny Billquist<bqt%softjar.se@localhost>  wrote:
> > I think that is bad advice. If the max spawn rate is exceeded, there is
> > something wrong. Increasing the max spawn rate will not solve that, but
> > can cause greater problems. However, I suspect the end result will just
> > be the same, but it will have forked more times before disabling the
> > service.
> >
> > What I'd do is I'd disable the service in inetd.conf, and run it by hand
> > on the command line, with debugging enabled. That would probably give a
> > hint on what the problem is.
> >
> >         Johnny
> >
> > On 2012-03-26 12:56, MASUDA Hideo wrote:
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > >
> > > Hi Mark,
> > >
> > >    Try this configuration.
> > >
> > > /etc/inetd.conf ---
> > > tftp dgram udp wait:400 root /usr/libexec/tftpd       tftpd -l -s /tftpboot
> > > #                  ^^^^<- increase max spawn rate
> > > #                          from 40 (default) to 400 (example).
> > >
> > >    See Also inetd.conf(5).
> > >
> > > Cheers.
> > > - --
> > > MASUDA Hideo (h-masuda%ootani.nagata.kobe.jp@localhost)
> > > FingerPrint = C532 9F5B 4D7D DA76 8BFF  CAA3 C073 5C9E 10FF 98EF
> > >
> > > 2012/03/24 00:37, IT geek 31 wrote:
> > > > I am trying to PXE boot an OS installation media using both PXE and TFTP.
> > > >
> > > > I have configured DHCP, the PXE menu file and the appropriate file
> > > > structure without issue.
> > > >
> > > > However, as my client boots, on the NetBSD server I receive the
> > > > following error in /var/log/messages:
> > > >
> > > >             Mar 23 16:35:41 qube1 inetd[596]: tftp/udp max spawn rate
> > > > (40 in 60 seconds) exceeded; service not started
> > > >
> > > > At this point it appears the TFTP daemon crashes and the OS
> > > > installation on the client fails.
> > > >
> > > > I have tried changing the following line to nowait in /etc/inetd.conf,
> > > > but after a reboot, TFTP refuses to start:
> > > >
> > > >             tftp            dgram   udp     wait    root
> > > > /usr/libexec/tftpd      tftpd -l -s /tftpboot
> > > >
> > > > Anyone have any idea what I need to do to get it working?  I'm running
> > > > NetBSD/cobalt 5.1.
> > > >
> > > > Many thanks,
> > > >
> > > >
> > > > -Mark
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> >
> >
> > --
> > Johnny Billquist                  || "I'm on a bus
> >                                   ||  on a psychedelic trip
> > email: bqt%softjar.se@localhost             ||  Reading murder books
> > pdp is alive!                     ||  tryin' to stay hip" - B. Idol