Re: [xcat-user] single node nodeset taking over 1 minute

[Blayne Puklich]

See if you can find out what file descriptor 3 is earlier in that strace 
output. That might give you a hint.

---
Blayne Puklich             Minneapolis, MN       PGP Key ID: 0xC52CA6C1
* mailto:blayne at puklich.com
         I'd explain it to you, but your brain would explode.
On 2 May 2024, at 9:58, keith.han...@lmco.com wrote:

I have 2 different xcat boot servers (we'll call them boot1 and boot2) 
both running xcat 2.16.5 who were upgraded from 2.10.   boot2 was 
upgraded directly, while boot 1 was upgraded but then xcat was removed 
completely then installed 2.16.5 fresh.

I am having an issue with nodeset on boot1. For some reason, nodeset 
on a single node on boot 1 takes over a minute, while nodeset on the 
same node on boot2 takes less than a second. I can' seem to find the 
cause of this. I tried stracing the nodeset and I get long timeouts on 
a resource being temporarily unavailable but I can't seem to figure 
out the resource.

[root@boot1 ~]# time nodeset -V proc5201_p osimage=rhel7-ia2
proc5201_p: netboot rhels7.4-x86_64-compute

real    0m50.636s
user    0m0.064s
sys     0m0.038s

[root@boot2 ~]# time nodeset -V proc5201_p osimage=rhel7-ia2
proc5201_p: netboot rhels7.4-x86_64-compute

real    0m0.799s
user    0m0.060s
sys     0m0.033s


on boot1:
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)
read(3, 0x20de033, 5)                   = -1 EAGAIN (Resource 
temporarily unavailable)
select(8, [3], NULL, NULL, {0, 500000}) = 0 (Timeout)


Has anyone seen this before and can help explain why this is 
happening?

_______________________
- Keith Hannum
- keith.han...@lmco.com

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