[Thinlinc-technical] tlwebadm/tlwebaccess (tlstunnel) producing zombies

[Jens Langner]

Hello,

I dunno if this is a known issue, but having ThinLinc running for a while now I often see that the number of Zombie processes increases on the server. Search for the reason of the zombies I see the following:

-- cut here --
root at saturn:~# ps aux | grep tlstunnel
root      6371  0.0  0.0  11816   928 pts/28   S+   19:37   0:00 grep --color=auto tlstunnel
root     61846  0.0  0.0  11864  1380 ?        S    Jul14   0:00 tlstunnel --port 1010 --maxbuf 16384 --un_sock /var/run/tlwebadm.sock --cert /opt/thinlinc/etc/tlwebadm/server.crt --certkey /opt/thinlinc/etc/tlwebadm/server.key --logname tlwebadm
root     64262  0.0  0.0      0     0 ?        Z    Jul15   0:00 [tlstunnel] <defunct>
root     64263  0.0  0.0      0     0 ?        Z    Jul15   0:00 [tlstunnel] <defunct>
root     64264  0.0  0.0      0     0 ?        Z    Jul15   0:00 [tlstunnel] <defunct>
root     64265  0.0  0.0      0     0 ?        Z    Jul15   0:00 [tlstunnel] <defunct>
root     64266  0.0  0.0      0     0 ?        Z    Jul15   0:00 [tlstunnel] <defunct>
root     64267  0.0  0.0      0     0 ?        Z    Jul15   0:00 [tlstunnel] <defunct>
-- cut here --

As you can see tlstunnel of tlwebadm is somehow producing zombies at some point. The same actually happens with the tlwebaccess of ThinLinc. Is this behavior known and if so, is there some kind of fix/workaround for it? The good thing is, however, that as soon as I restart tlwebaccess and tlwebadm the zombie processes are gone.

best regards,
jens
-- 
Dr. Jens Langner
Helmholtz-Zentrum Dresden-Rossendorf
Institute of Radiopharmaceutical Cancer Research
Department of Positron Emission Tomography
POB 51 01 19, 01314 Dresden, Germany
http://www.hzdr.de/ | +49 351 260 2757

Vorstand: Prof. Dr. Dr. h. c. Roland Sauerbrey
Prof. Dr. Dr. h. c. Peter Joehnk
VR 1693 beim Amtsgericht Dresden

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