[Xen-devel] Error while creating domains

[Srivatsa Vaddagiri <vatsa@xxxxxxxxxx>]

I am trying to start a large number of SMP domains (> 50). However,
I am unable to create more than 7 domains. When I try creating
the 8th domain, I get this error:

Using config file "myconf7".
VIRTUAL MEMORY ARRANGEMENT:
 Loaded kernel: 0xc0100000->0xc0344c24
 Init. ramdisk: 0xc0345000->0xc0345000
 Phys-Mach map: 0xc0345000->0xc0347800
 Page tables:   0xc0348000->0xc034a000
 Start info:    0xc034a000->0xc034b000
 Boot stack:    0xc034b000->0xc034c000
 TOTAL:         0xc0000000->0xc0400000
 ENTRY ADDRESS: 0xc0100000
 VCPUS:         4
Domain construction error: cannot concatenate 'str' and 'NoneType' objects
Traceback (most recent call last):
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 483, in construct
    self.configure()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 992, in configure
    self.create_devices()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 768, in create_devices
    self.create_configured_devices()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 757, in 
create_configured_devices
    self.createDevice(ctrl_type, dev_config, recreate=recreate)
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 332, in createDevice
    return ctrl.createDevice(devconfig, recreate=self.recreate)
  File "/usr/lib/python/xen/xend/server/controller.py", line 236, in 
createDevice
    dev.attach(recreate=recreate, change=change)
  File "/usr/lib/python/xen/xend/server/blkif.py", line 221, in attach
    self.setNode(node)
  File "/usr/lib/python/xen/xend/server/blkif.py", line 247, in setNode
    mounted_mode = self.check_mounted(node)
  File "/usr/lib/python/xen/xend/server/blkif.py", line 265, in check_mounted
    mode = blkif.mount_mode(name)
  File "/usr/lib/python/xen/util/blkif.py", line 73, in mount_mode
    exp = re.compile('^' + name + ' .*[\(,]r(?P<mode>[ow])[,\)]')
TypeError: cannot concatenate 'str' and 'NoneType' objects
op_create> Exception creating domain:
Traceback (most recent call last):
  File "/usr/lib/python/xen/xend/server/SrvDomainDir.py", line 63, in op_create
    dominfo = self.xd.domain_create(config)
  File "/usr/lib/python/xen/xend/XendDomain.py", line 282, in domain_create
    dominfo = XendDomainInfo.vm_create(config)
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 153, in vm_create
    vm.construct(config)
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 483, in construct
    self.configure()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 992, in configure
    self.create_devices()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 768, in create_devices
    self.create_configured_devices()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 757, in 
create_configured_devices
    self.createDevice(ctrl_type, dev_config, recreate=recreate)
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 332, in createDevice
    return ctrl.createDevice(devconfig, recreate=self.recreate)
  File "/usr/lib/python/xen/xend/server/controller.py", line 236, in 
createDevice
    dev.attach(recreate=recreate, change=change)
  File "/usr/lib/python/xen/xend/server/blkif.py", line 221, in attach
    self.setNode(node)
  File "/usr/lib/python/xen/xend/server/blkif.py", line 247, in setNode
    mounted_mode = self.check_mounted(node)
  File "/usr/lib/python/xen/xend/server/blkif.py", line 265, in check_mounted
    mode = blkif.mount_mode(name)
  File "/usr/lib/python/xen/util/blkif.py", line 73, in mount_mode
    exp = re.compile('^' + name + ' .*[\(,]r(?P<mode>[ow])[,\)]')
TypeError: cannot concatenate 'str' and 'NoneType' objects
Error: Error creating domain: cannot concatenate 'str' and 'NoneType' objects


Is this a bug or a python compatibility issue? FYI, I am running this on
a 4way Intel box with RHEL4 installed on it. I have installed latest
(as of 7 June) xen-unstable-src.tgz.



-- 


Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel