[gpfsug-discuss] Thousands of CLOSE_WAIT IPV6 connections on CES

[Leonardo Sala]

Dear all,

I was wondering if anybody recently encountered a similar issue (I found 
a related thread from 2018, but it was inconclusive). I just found that 
one of our production CES nodes have 28k CLOSE_WAIT tcp6 connections, I 
do not understand why... the second node in the same cluster does not 
have this issue. Both are:

- GPFS 5.0.4.2

- RHEL 7.4

has anybody else encountered anything similar? In the last few days it 
seems it happened once on one node, and twice on the other, but never on 
both...

Thanks for any feedback!

cheers

leo

-- 
Paul Scherrer Institut
Dr. Leonardo Sala
Group Leader High Performance Computing
Deputy Section Head Science IT
Science IT
WHGA/036
Forschungstrasse 111
5232 Villigen PSI
Switzerland

Phone: +41 56 310 3369
leonardo.sala at psi.ch
www.psi.ch

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