Description of problem:
calling status on an instance of class Vm(object) throws the following exception:
2016-01-05 23:41:17,725 - mom.GuestManager - ERROR - Guest Manager crashed
Traceback (most recent call last):
File "/usr/lib/python2.6/site-packages/mom/GuestManager.py", line 114, in run
File "/usr/lib/python2.6/site-packages/mom/HypervisorInterfaces/vdsmInterface.py", line 75, in getVmList
File "/usr/share/vdsm/API.py", line 1380, in getVMList
File "/usr/share/vdsm/API.py", line 1370, in reportedStatus
File "/usr/share/vdsm/virt/vm.py", line 2817, in status
File "/usr/share/vdsm/virt/vm.py", line 2817, in <genexpr>
RuntimeError: dictionary changed size during iteration
2016-01-05 23:41:19,843 - mom - ERROR - Thread 'GuestManager' has exited
Version-Release number of selected component (if applicable):
vdsm-4.16.20-1.el6ev.x86_64
How reproducible:
Randomly (race condition)
Steps to Reproduce:
Most probably by forcing massive live migration
Actual results:
the mentioned exception
Expected results:
Exception cannot raise
Additional info:
In this case the exception causes malfunctioning MoM as the GuestManager crashes due to this exception.
Comment 12Francesco Romani
2016-01-13 09:19:54 UTC
verified on Red Hat Enterprise Virtualization Manager Version: 3.6.3.2-0.1.el6
mom-0.5.2-1.el7ev.noarch
vdsm-4.17.21-0.el7ev.noarch
verification steps:
1. Create a pool of 20 VMs (The hosts where very loaded, 5 Vms on each core)
2. Migrate all the 20 VMs
3. Check in mom logs
To be sure, I repeated this steps several times.
I didn't see this exception.
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.
https://rhn.redhat.com/errata/RHBA-2016-0362.html
Description of problem: calling status on an instance of class Vm(object) throws the following exception: 2016-01-05 23:41:17,725 - mom.GuestManager - ERROR - Guest Manager crashed Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/mom/GuestManager.py", line 114, in run File "/usr/lib/python2.6/site-packages/mom/HypervisorInterfaces/vdsmInterface.py", line 75, in getVmList File "/usr/share/vdsm/API.py", line 1380, in getVMList File "/usr/share/vdsm/API.py", line 1370, in reportedStatus File "/usr/share/vdsm/virt/vm.py", line 2817, in status File "/usr/share/vdsm/virt/vm.py", line 2817, in <genexpr> RuntimeError: dictionary changed size during iteration 2016-01-05 23:41:19,843 - mom - ERROR - Thread 'GuestManager' has exited Version-Release number of selected component (if applicable): vdsm-4.16.20-1.el6ev.x86_64 How reproducible: Randomly (race condition) Steps to Reproduce: Most probably by forcing massive live migration Actual results: the mentioned exception Expected results: Exception cannot raise Additional info: In this case the exception causes malfunctioning MoM as the GuestManager crashes due to this exception.