Bug 1408790 – After hotplugging CPU results in frequent KeyError.

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 1408790 - After hotplugging CPU results in frequent KeyError.

Summary:	After hotplugging CPU results in frequent KeyError.

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Virtualization Manager
Classification:	Red Hat
Component:	ovirt-engine (Show other bugs)
Sub Component:
Version:	3.6.9
Hardware:	Unspecified Unspecified

Priority	medium Severity medium
Target Milestone:	ovirt-4.1.0-beta
Target Release:	---
Assigned To:	Milan Zamazal
QA Contact:	Israel Pinto
Docs Contact:

URL:
Whiteboard:
Keywords:	ZStream

Depends On:
Blocks:	1413968 1413970
	Show dependency tree / graph

Reported:	2016-12-27 03:44 EST by Ameya Charekar
Modified:	2017-10-02 13:14 EDT (History)
CC List:	15 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	Previously, there were frequent KeyError tracebacks in the vdsm.log after CPU hotplug. Now, these errors are no longer produced by VDSM after CPU hotplug.
Story Points:	---
Clone Of:
Clones:	1413968 1413970 (view as bug list)
Environment:
Last Closed:	2017-04-24 20:42:22 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	Virt
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
oVirt gerrit	69999	None	None	None	2017-01-13 08:56 EST
oVirt gerrit	70356	None	None	None	2017-01-13 08:57 EST
Red Hat Product Errata	RHEA-2017:0997	normal	SHIPPED_LIVE	Red Hat Virtualization Manager (ovirt-engine) 4.1 GA	2017-04-18 16:11:26 EDT

Groups: None (edit)

Description Ameya Charekar 2016-12-27 03:44:51 EST

After hotplugging CPU results in following KeyError:

~~~
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/vdsm/executor.py", line 192, in _execute_task
    callable()
  File "/usr/share/vdsm/virt/periodic.py", line 289, in __call__
    self._execute()
  File "/usr/share/vdsm/virt/periodic.py", line 345, in _execute
    self._vm.updateNumaInfo()
  File "/usr/share/vdsm/virt/vm.py", line 5181, in updateNumaInfo
    self._numaInfo = numaUtils.getVmNumaNodeRuntimeInfo(self)
  File "/usr/share/vdsm/numaUtils.py", line 116, in getVmNumaNodeRuntimeInfo
    vnode_index = str(vcpu_to_vnode[vcpu_id])
KeyError: 8
~~~

We already have upstream patch for the same:

https://gerrit.ovirt.org/#/c/65562/1..4

But latest Package - vdsm-python-4.18.15.3-1.el7ev.noarch.rpm does not have the patch.

Comment 1 Michal Skrivanek 2016-12-28 02:59:48 EST

Yes, this is fixed in 4.1. Is that enough or an earlier release is requested?

Comment 4 Milan Zamazal 2017-01-13 08:57:53 EST

Patch backported to 4.0, backport to 3.6 posted.

Comment 8 Israel Pinto 2017-01-24 04:54:49 EST

Verify with:
Engine Version: 4.1.0.3-0.0.master.20170123183440.gita89d24a.el7.centos
Host: 
OS Version:RHEL - 7.3 - 7.el7
Kernel Version:3.10.0 - 514.6.1.el7.x86_64
KVM Version:2.6.0 - 28.el7_3.3.1
LIBVIRT Version:libvirt-2.0.0-10.el7_3.4
VDSM Version:vdsm-4.19.2-6.gitd2cbe37.el7.centos
SPICE Version:0.12.4 - 20.el7_3

Steps:
1. Create VM with 1 CPU and Run it
2. Hotplug CPU to 2 and check vdsm log 
2. Hot unplug CPU to 1 and check vdsm log 

Results:
CPU is updated, No Error in vdms log

Note You need to log in before you can comment on or make changes to this bug.