Bug 807414

Summary:	kdump test fails after switchting to summer time / daylight saving time
Product:	[Retired] Red Hat Hardware Certification Program	Reporter:	Rainer Koenig <Rainer.Koenig>
Component:	Test Suite (tests)	Assignee:	Caspar Zhang <czhang>
Status:	CLOSED NOTABUG	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	6.1	CC:	czhang, gnichols, qcai, rlandry
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-10-17 17:18:09 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Rainer Koenig 2012-03-27 17:45:33 UTC

Description of problem:
Germany switched to summer time (CEST) last weekend. Last week I performed 32-bit kdump tests on a test system and they passed. Today I performed the same tests with 64-bit and I failed. 

Version-Release number of selected component (if applicable):
Actual version of v7 testsuite

How reproducible:
always

Steps to Reproduce:
1. Install RHEL 6.2
2. Set HW clock to UTC and time zone to Europe/Berlin
3. Perform local kdump test
  
Actual results:
The test fails. The logs say, that no crashdump in a good time window could be found in /var/crash. 

Expected results:
kdump should work, regardless of the time and timezone settings.

Additional info:
Looking into /var/crash shows that the crashdump file is always 1 hour advanced to the real time.

Meanwhile I managed to pass the test with the following time settings:
- System clock is running on UTC
- System time zone is GMT-1h.

Looks like the change to summertime was messing things up. ;-)

Comment 1 Caspar Zhang 2012-07-18 07:44:23 UTC

Hi Rainer, is this still an issue? IIRC, the problem should no longer exist several hours later after switched to summer time.

Comment 2 Rob Landry 2012-08-06 19:07:38 UTC

Hrm,  I'm pretty certain nothing in v7 is daylight aware.  But it's worth confirming the issue does self resolve after a few hours or is there a period of time (days weeks months) where the various time zones being at different offsets continues to effect the test?