Bug 37032 – UMC system diagnostic module hangs for a long time

Bug 37032 - UMC system diagnostic module hangs for a long time


Summary:	UMC system diagnostic module hangs for a long time

Status:	CLOSED FIXED

Product:	UCS
Classification:	Unclassified
Component:	UMC - System diagnostic
Version:	UCS 4.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 4.0-0-errata
Assigned To:	Florian Best
QA Contact:	Alexander Kramer

URL:
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Depends on:
Blocks:	45343 48002
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Reported:	2014-11-26 09:10 CET by Stefan Gohmann
Modified:	2018-10-16 13:57 CEST (History)
CC List:	3 users (show)

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Flags:	best: Patch_Available+

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umc-system-diagonostic.png (170.44 KB, image/png) 2014-11-26 09:10 CET, Stefan Gohmann	Details
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Description Stefan Gohmann

2014-11-26 09:10:23 CET

Created attachment 6472 [details]
umc-system-diagonostic.png

If the gateway doesn't answer on ping request, the UMC system diagnostic module hangs for a long time, several minutes. See attached screenshot. It is not really clear if the module is still doing something. 

You can simply reproduce it by dropping all outgoing ping requests:
  iptables -A OUTPUT -p icmp --icmp-type echo-request -j DROP

I think it is a common situation that a gateway doesn't answer ping requests. At least we got this feedback.

Comment 1 Florian Best

2014-11-26 10:45:16 CET

The command is currently:
/bin/ping -c1 -w500 gateway
I hope this command will fix it:
/bin/ping -c1 -w500 -W500 gateway

Comment 2 Florian Best

2014-11-26 10:53:07 CET

(In reply to Florian Best from comment #1)
> The command is currently:
> /bin/ping -c1 -w500 gateway
> I hope this command will fix it:
> /bin/ping -c1 -w500 -W500 gateway

Omg. -w takes seconds not milliseconds.
Changing it to /bin/ping -c3 -w4 -W4 gateway

Comment 3 Florian Best

2014-11-28 21:38:48 CET

patch applied.
YAML added.

Comment 4 Alexander Kramer

2014-12-09 11:23:23 CET

OK - debian changelog
OK - yaml
OK - gateway ping does not block diagnostic-module anymore

Comment 5 Janek Walkenhorst

2014-12-19 11:48:26 CET

http://errata.univention.de/ucs/4.0/12.html