[Xen-users] Zombie VMs cannot be destroyed

[Michael Froh <mike@xxxxxxxxxxx>]

This sounds like a B rate horror movie.  Has anyone else seen Zombie  
VMs?
I had a number of VMs running and used the following script to  
destroy them:
for vm in `xm list | awk '{print $1}' | grep -v Name | grep -v  
Domain-0`; do xm destroy $vm; done
This destroyed all of the para-virtualized domains running (4 of  
them) but turned all the HVM VMs into Zombies as shown here:
[root@vm0 ~]# xm list
Name                                      ID Mem(MiB) VCPUs State    
Time(s)
Domain-0                                   0     5074     4 r-----    
4912.8
Zombie-dsl0                               25      256     1 -b---d     
552.1
Zombie-dsl1                               26      256     1 -b---d     
552.2
Zombie-dsl2                               27      256     1 -b---d     
550.0
Zombie-dsl3                               28      256     1 -b---d     
554.5
Zombie-knoppix0                           17      256     1 -b---d    
4459.9
Zombie-knoppix1                           18      256     1 -----d    
4425.9
Zombie-knoppix2                           19      256     1 -b---d    
4530.9
Zombie-knoppix3                           20      256     1 -b---d    
4493.7

Subsequent attempts to destroy the VMs using "xm destroy 25" or "xm  
destroy Zombie-dsl0" don't do anything.
It's curious that the VMs are shown as booting and being destroyed (- 
b----d).
The para-virtualized VMs were named centos[0-3] so it might be a  
timing issue where only 4 destroys were properly handled and the para- 
virtualized VMs happened to be the first 4 domains in xm list.
I will play around a bit to see if I can recreate consistently and if  
there options to really destroy the domains.  This is not an issue  
for me since my VM environment is a lab, but in production this might  
be very problematic.
Mike.

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