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Bug 1163386 - Mom reporting KeyError: 'vcpuCount' on VM startup
Summary: Mom reporting KeyError: 'vcpuCount' on VM startup
Alias: None
Product: Red Hat Enterprise Virtualization Manager
Classification: Red Hat
Component: mom
Version: 3.5.0
Hardware: All
OS: All
Target Milestone: ---
: 3.5.0
Assignee: Martin Sivák
QA Contact: Lukas Svaty
Whiteboard: sla
Depends On:
Blocks: rhev35rcblocker rhev35gablocker
TreeView+ depends on / blocked
Reported: 2014-11-12 15:32 UTC by Lukas Svaty
Modified: 2016-02-10 20:17 UTC (History)
8 users (show)

Fixed In Version: mom-0.4.1-2.el6ev
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2015-02-11 20:27:50 UTC
oVirt Team: SLA
Target Upstream Version:

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2015:0186 normal SHIPPED_LIVE mom bug fix and enhancement update 2015-02-12 01:18:26 UTC

Description Lukas Svaty 2014-11-12 15:32:22 UTC
Description of problem:
During VM start:
2014-11-12 04:07:37,430 - mom.Monitor - INFO - GuestMonitor-balloon-1 starting
2014-11-12 04:07:37,431 - mom.Collectors.GuestMemory - WARNING - getVmMemoryStats() error: The ovirt-guest-agent is not active
2014-11-12 04:07:37,432 - mom.Monitor - ERROR - GuestMonitor-balloon-1 crashed
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/mom/", line 56, in run
  File "/usr/lib/python2.7/site-packages/mom/", line 91, in collect
    collected = c.collect()
  File "/usr/lib/python2.7/site-packages/mom/Collectors/", line 44, in collect
    stat = self.hypervisor_iface.getVmCpuTuneInfo(self.uuid)
  File "/usr/lib/python2.7/site-packages/mom/HypervisorInterfaces/", line 184, in getVmCpuTuneInfo
    vcpuCount = response['statsList'][0]['vcpuCount']
KeyError: 'vcpuCount'

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Run VM with GA installed
2. See mom logs during vm start

Actual results:
Log spammed by mentioned keyerror.

Expected results:
Mom should wait while the guest-agent is loaded on VM and that try to get stats from it.

Comment 1 Lukas Svaty 2014-11-12 15:37:41 UTC
also on shutdown this appers from time to time in the events:

2014-11-12 04:27:51,325 - mom.vdsmInterface - ERROR - Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/mom/HypervisorInterfaces/", line 210, in setVmCpuTune
  File "/usr/lib/python2.7/site-packages/mom/HypervisorInterfaces/", line 46, in _check_status
    raise vdsmException(response, self.logger)

Comment 2 Martin Sivák 2014-11-12 15:40:05 UTC
We already have a fix for the first issue. Only a downstream rebuild is needed.

Comment 5 Lukas Svaty 2014-12-04 08:16:23 UTC
verified in mom-0.4.1-2.el6ev

Comment 7 errata-xmlrpc 2015-02-11 20:27:50 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

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