Re: TFTP spawn issue

[matthew sporleder <msporleder%gmail.com@localhost>]

(top-posting)

My guess is that this is your switch/nic not liking something.

I believe error 768 is a timeout or aborted transfer of some kind..

Try a tcpdump and you'll probably see the request die.

Also try a different switch settings/spanning tree/auto-neg/who knows.

On Tue, Mar 27, 2012 at 11:12 AM, IT geek 31 
<itgeek31%googlemail.com@localhost> 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