abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py' occurred on a Red Hat Enterprise Virtualization 3.0 host

Issue

There are two closely related symptoms to this problem.

1. After installing the rhn-virtualization-host and rhn-virtualization-common rpms on a RHEL6 host that is part of a Red Hat Enterprise Virtualization (RHEV) 3.0 cluster, the host system may start to consume an excessive amount of memory, repetitively reporting the following to /var/log/messages;

   ...............
   Sep 17 13:54:01 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 13:56:02 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 13:58:02 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 14:00:01 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 14:02:02 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 14:04:02 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 14:06:02 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 14:08:02 RHV-AES-114 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   ...............
   

   There will be several pairs of CROND and /usr/share/rhn/virtualization/poller.py processes running;

   F   UID   PID  PPID PRI  NI    VSZ   RSS WCHAN  STAT TTY        TIME COMMAND
   .............
   5     0 32631  3891  20   0 140088  1020 pipe_w S    ?          0:00 CROND
   4     0 32633 32631  20   0 271892  6720 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.py
   5     0 32647  3891  20   0 140088  1276 pipe_w S    ?          0:00 CROND
   4     0 32649 32647  20   0 271892 20060 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.py
   5     0 32693  3891  20   0 140088  1300 pipe_w S    ?          0:00 CROND
   4     0 32695 32693  20   0 271888 20104 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.py
   .............
   

   The following mail will be sent to the root user every time that /usr/share/rhn/virtualization/poller.py runs;

   Traceback (most recent call last):
     File "/usr/share/rhn/virtualization/poller.py", line 290, in <module>
       domain_list = poll_through_vdsm()
     File "/usr/share/rhn/virtualization/poller.py", line 140, in poll_through_vdsm
       import localvdsm
     File "/usr/share/rhn/virtualization/localvdsm.py", line 35, in <module>
       raise ImportError('local vdsm not found')
   ImportError: local vdsm not found
   

2. After installing the rhn-virtualization-host and rhn-virtualization-common rpms on a RHEL6 host that is part of a Red Hat Enterprise Virtualization (RHEV) 3.0 cluster, the host system may start to repetitively report the following message sequence to /var/log/messages;

   Sep 17 16:22:10 dhcp-190-228 abrtd: Sending an email...
   Sep 17 16:22:10 dhcp-190-228 abrtd: Email was sent to: root@localhost
   Sep 17 16:22:10 dhcp-190-228 abrtd: New problem directory /var/spool/abrt/pyhook-2012-09-17-16:22:01-53703, processing
   Sep 17 16:24:02 dhcp-190-228 abrt: detected unhandled Python exception in '/usr/share/rhn/virtualization/poller.py'
   Sep 17 16:24:02 dhcp-190-228 abrtd: New client connected
   Sep 17 16:24:02 dhcp-190-228 abrtd: Directory 'pyhook-2012-09-17-16:24:02-55753' creation detected
   Sep 17 16:24:02 dhcp-190-228 abrt-server[55761]: Saved Python crash dump of pid 55753 to /var/spool/abrt/pyhook-2012-09-17-16:24:02-55753
   

   The /usr/share/rhn/virtualization/poller.py and associated cron processes terminate as expected. No excessive memory usage should be observed.

   Again, the following mail will be sent to the root user every time that /usr/share/rhn/virtualization/poller.py runs;

   Traceback (most recent call last):
     File "/usr/share/rhn/virtualization/poller.py", line 290, in <module>
       domain_list = poll_through_vdsm()
     File "/usr/share/rhn/virtualization/poller.py", line 140, in poll_through_vdsm
       import localvdsm
     File "/usr/share/rhn/virtualization/localvdsm.py", line 35, in <module>
       raise ImportError('local vdsm not found')
   ImportError: local vdsm not found