Created attachment 911980 [details]
vdsm log

Description of problem:
After each time I add disk to active vm, in vdsm log an exception is raised:


GuestMonitor-123::ERROR::2014-06-25 11:47:34,974::vm::376::vm.Vm::(_getDiskStats) vmId=`6c8ea9b4-645c-4653-b662-697c3d1f61ba`::Disk vdb stats not available
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/vm.py", line 372, in _getDiskStats
    (eInfo[dName][1] - sInfo[dName][1]) / sampleInterval)
KeyError: u'vdb'
GuestMonitor-123::ERROR::2014-06-25 11:47:34,974::vm::418::vm.Vm::(_getDiskLatency) vmId=`6c8ea9b4-645c-4653-b662-697c3d1f61ba`::Disk vdb latency not available
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/vm.py", line 416, in _getDiskLatency
    dLatency = _avgLatencyCalc(sInfo[dName], eInfo[dName])
KeyError: u'vdb'
GuestMonitor-123::ERROR::2014-06-25 11:47:34,975::vm::376::vm.Vm::(_getDiskStats) vmId=`6c8ea9b4-645c-4653-b662-697c3d1f61ba`::Disk vdb stats not available
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/vm.py", line 372, in _getDiskStats
    (eInfo[dName][1] - sInfo[dName][1]) / sampleInterval)
KeyError: u'vdb'
GuestMonitor-123::ERROR::2014-06-25 11:47:34,975::vm::418::vm.Vm::(_getDiskLatency) vmId=`6c8ea9b4-645c-4653-b662-697c3d1f61ba`::Disk vdb latency not available
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/vm.py", line 416, in _getDiskLatency
    dLatency = _avgLatencyCalc(sInfo[dName], eInfo[dName])
KeyError: u'vdb'


Version-Release number of selected component (if applicable):
vdsm-4.15.0-78.git349f848.el6.x86_64
libvirt-0.10.2-29.el6_5.7.x86_64


How reproducible:
100%

Steps to Reproduce:
1. run a vm
2. add new disk
3.

Actual results:
explained above

Expected results:
the disk should be added with no exceptions

Additional info: