Re: problems with soft-nfs when the server goes down

If you can't get a core, can you save the tcpump output to 
a file and send me the file ?

Make sure you specify -s1500 (so the entire NFS header 
gets captured).

thanks

mohan

--- Oliver Lehmann <lehmann_at_ans-netz.de> wrote:

> Mohan Srinivasan wrote:
> 
> > FYI - 
> > 
> > I am not able to reproduce the problem in my setup (at least
> > not easily). So a tcpdump and core would be very helpful.
> > 
> 08:09:01.610027 IP curry.salatschuessel.net.1660761846 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:09:16.978803 IP curry.salatschuessel.net.1660761846 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:09:32.357595 IP curry.salatschuessel.net.1660761847 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:09:47.726377 IP curry.salatschuessel.net.1660761847 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:10:03.105170 IP curry.salatschuessel.net.1660761847 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:10:03.184644 IP 10.0.1.251.nfs > curry.salatschuessel.net.1660761847: reply ok 1472 read
> 08:10:03.184752 IP 10.0.1.251 > curry.salatschuessel.net: udp
> 08:10:03.184988 IP 10.0.1.251 > curry.salatschuessel.net: udp
> 08:10:03.185112 IP 10.0.1.251 > curry.salatschuessel.net: udp
> 08:10:03.185239 IP 10.0.1.251 > curry.salatschuessel.net: udp
> 08:10:03.185312 IP 10.0.1.251 > curry.salatschuessel.net: udp
> 
> 
> on 08:10 the server was back online. But beep-media-player was still stucked.
> I ran a ktrace then on the pid of beep-media-player:
> 
>   1781 beep-media-player CALL  ioctl(0x9,SNDCTL_DSP_GETOSPACE,0xbf1f6ee0)
>   1781 beep-media-player RET   ioctl 0
>   1781 beep-media-player CALL  kse_release(0x80c1f4c)
>   1781 beep-media-player RET   kse_release 0
>   1781 beep-media-player CALL  ioctl(0x9,SNDCTL_DSP_GETOSPACE,0xbf1f6ee0)
>   1781 beep-media-player RET   ioctl 0
>   1781 beep-media-player CALL  kse_release(0x80c1f4c)
>   1781 beep-media-player RET   kse_release 0
>   1781 beep-media-player CALL  ioctl(0x9,SNDCTL_DSP_GETOSPACE,0xbf1f6ee0)
>   1781 beep-media-player RET   ioctl 0
>   1781 beep-media-player CALL  kse_release(0x80c1f4c)
>   1781 beep-media-player RET   kse_release 0
>   1781 beep-media-player CALL  ioctl(0x9,SNDCTL_DSP_GETOSPACE,0xbf1f6ee0)
>   1781 beep-media-player RET   ioctl 0
>   1781 beep-media-player CALL  kse_release(0x80c1f4c)
>   1781 beep-media-player RET   kse_release 0
>   1781 beep-media-player CALL  select(0x8,0xbf8fdef0,0,0,0xbf8fde38)
>   1781 beep-media-player RET   fork 0
>   1781 beep-media-player CALL  kse_release(0x80c1f44)
>   1781 beep-media-player RET   kse_release 0
>   1781 beep-media-player CALL  kse_release(0x80c1f4c)
>   1781 beep-media-player RET   kse_release 0
>   1781 beep-media-player CALL  ioctl(0x9,SNDCTL_DSP_GETOSPACE,0xbf1f6ee0)
>   1781 beep-media-player RET   ioctl 0
>   1781 beep-media-player CALL  kse_release(0x80c1f4c)
>   1781 beep-media-player RET   kse_release 0
> 
> all the time repeating that. The nfs mount itself is working I can
> ls /mnt/tmp for example
> 
> When I try mpg123,
> 
> 08:20:18.339812 IP curry.salatschuessel.net.596824881 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:20:22.189524 IP curry.salatschuessel.net.596824881 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:20:29.878921 IP curry.salatschuessel.net.596824881 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:20:45.247753 IP curry.salatschuessel.net.596824881 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:21:00.616563 IP curry.salatschuessel.net.596824881 > 10.0.1.251.nfs: 112 read [|nfs]
> 08:23:09.367970 IP curry.salatschuessel.net.596824882 > 10.0.1.251.nfs: 104 access [|nfs]
> 08:23:09.368508 IP 10.0.1.251.nfs > curry.salatschuessel.net.596824882: reply ok 120 access c
> 001c
> 
> And all I get with ktrace out is
> 
>    569 mpg123   RET   write 16384/0x4000
> 
> as the last line, and after that nothing more.
> 
> I'm not sure how to get a coredump out of these locked processes.
> 
> -- 
>  Oliver Lehmann
>   http://www.pofo.de/
>   http://wishlist.ans-netz.de/
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