Bug 45343 - UMC system diagnostic module hangs for a long time (4.3)
UMC system diagnostic module hangs for a long time (4.3)
Product: UCS
Classification: Unclassified
Component: UMC - System diagnostic
UCS 4.2
Other Linux
: P5 normal (vote)
: UCS 4.3-0-errata
Assigned To: Arvid Requate
Felix Botner
Depends on: 37032
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Reported: 2017-09-07 16:40 CEST by Arvid Requate
Modified: 2018-03-28 13:28 CEST (History)
5 users (show)

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What kind of report is it?: Bug Report
What type of bug is this?: 4: Minor Usability: Impairs usability in secondary scenarios
Who will be affected by this bug?: 2: Will only affect a few installed domains
How will those affected feel about the bug?: 2: A Pain – users won’t like this once they notice it
User Pain: 0.091
Enterprise Customer affected?:
School Customer affected?:
ISV affected?:
Waiting Support:
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Screenshot_20170907_162957.png (97.76 KB, image/png)
2017-09-07 16:40 CEST, Arvid Requate

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Description Arvid Requate univentionstaff 2017-09-07 16:40:51 CEST
Created attachment 9181 [details]

Soemtimes the UMC system diagnostic module hangs for a long time, several minutes (or infinitely?). See attached screenshot. All tests seem to run but finally it hangs at 96% with the last message "Diagnosis of "Gateway is not reachable" was successful". It is not really clear if the module is still doing something.

My environment consisted of a UCS 4.2-2 Master and Backup, both with Samba/AD and I observed this during QA for Bug #36748. I had killed the KDC on the DC Backup for QA purposes.

In case it hangs, I can instruct the browser to reload the page, and then it works (always?). But when I click on "Run tests again", it hangs again.

We had this before under different circumstances and fixed in in the bug I cloned.

+++ This bug was initially created as a clone of Bug #37032 +++
Comment 1 Arvid Requate univentionstaff 2017-09-07 16:49:36 CEST
While I filed this bug, an error message popped up:

An unknown error with status code 502 occurred while connecting to the server, please try again later.


* First time: Works
* Second time: Works
* Third time: Hangs
Comment 2 Erik Damrose univentionstaff 2017-09-08 09:09:14 CEST
Which UCS Version / errata level?
Comment 3 Arvid Requate univentionstaff 2017-09-08 12:02:39 CEST
> My environment consisted of a UCS 4.2-2 Master and Backup, both with Samba/AD
> and I observed this during QA for Bug #36748.

I guess errata level 159
Comment 4 Arvid Requate univentionstaff 2018-03-20 14:07:36 CET
It's diagnostic/plugins/01_ssh_connection.py that sometimes hangs:


This workaround seemed to fix it for me:

8a1ef5f166 | Workaround for Python paramiko hangs
4d9067fe2e | Advisory

Fixing together with Bug 45904 and Bug 45584.
Comment 5 Felix Botner univentionstaff 2018-03-21 13:27:04 CET
OK - ssh check
Comment 6 Arvid Requate univentionstaff 2018-03-28 13:28:26 CEST