[DRBD-user] Zombie, Zombie?

Andreas Semt as at computer-leipzig.de
Mon Apr 26 03:15:04 CEST 2004

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Hello list!

I use DRBD 0.6.12 (with heartbeat 1.21). Sometimes I get some real high 
load on my machine (load average around 6) and a zombie process like 
drbd_syncer_2 or drbd_syncer_3. I believe the zombie process causes the 
high load. Also i lost a drbd connection without reason (one connection 
of four).
Additional information: the zombie processes disappear after some time 
and the load is normal again. Zombies exist only on the drbd "PRIMARY" 
machine (all drbd devices in primary mode).

My questions:

1. Could it be a zombie process who killed the drbd connection?
2. Why these Zombies live on my machine?

Here some output:

# top

--- snip ---
  3339 root       9   0     0    0     0 SW    0.0  0.0   0:00 
  3340 root      -1 -20     0    0     0 Z <   0.0  0.0   0:00 
drbd_syncer_3 <defunct>
--- snap ---

--- snip ---
node1:/# cat /proc/drbd
version: 0.6.12 (api:64/proto:62)

0: cs:Connected st:Primary/Secondary ns:576 nr:0 dw:576 dr:425 pe:2 ua:0
1: cs:Connected st:Primary/Secondary ns:3596 nr:0 dw:3596 dr:1393 pe:5 ua:0
2: cs:Connected st:Primary/Secondary ns:36 nr:0 dw:36 dr:385 pe:0 ua:0
3: cs:Connected st:Primary/Secondary ns:98566160 nr:0 dw:16 dr:98566297 
pe:0 ua:0

node2:/# cat /proc/drbd
version: 0.6.12 (api:64/proto:62)

0: cs:Connected st:Secondary/Primary ns:0 nr:568 dw:568 dr:0 pe:0 ua:0
1: cs:Connected st:Secondary/Primary ns:0 nr:3576 dw:3576 dr:0 pe:0 ua:0
2: cs:Connected st:Secondary/Primary ns:0 nr:36 dw:36 dr:0 pe:0 ua:0
3: cs:Connected st:Secondary/Primary ns:0 nr:98566160 dw:98566160 dr:0 
pe:0 ua:0
--- snap ---

THANKS for any help!

Best regards,
Andreas Semt

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