[Xen-users] Restarting xend while domU are running

[bertrand.lupart@xxxxxxxxxx (Bertrand LUPART)]

Hello,

Story:
- xend 3.2.1 crashed on Dom0 and didn't restarted (xend.log below)
- DomU are still running


Question:
- Is it safe to restart xend while DomU are still running? Won't xend
try to start allready running DomU and mess up stuff?
- Is it safer to log into each DomU and shutdown it manually before
restarting xend?

Thanx,



----8<----8<----8<----
[2011-07-13 06:35:24 3509] CRITICAL (SrvDaemon:231) Xend died due to
signal 9!  Restarting it.
[2011-07-13 06:35:24 8776] INFO (SrvDaemon:331) Xend Daemon started
[2011-07-13 06:35:25 8776] INFO (SrvDaemon:335) Xend changeset:
unavailable.
[2011-07-13 06:35:26 8776] INFO (SrvDaemon:342) Xend version: Unknown.
[2011-07-13 06:35:32 8776] INFO (XendNetwork:114) Not recreating missing
unmanaged network eth0
[2011-07-13 06:35:34 8776] DEBUG (XendDomainInfo:132)
XendDomainInfo.recreate({'max_vcpu_id': 3, 'cpu_time':
1268771652253510L, 'ssidref': 73744, 'hvm': 0, 'shutdown_reason': 0,
'dying': 0, 'online_vcpus': 4, 'domid': 0, 'pau
sed': 0, 'crashed': 0, 'running': 1, 'maxmem_kb': 17179869180L,
'shutdown': 0, 'mem_kb': 643072L, 'handle': [0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0], 'blocked': 0, 'name': 'Domain-0'})
[2011-07-13 06:35:34 8776] INFO (XendDomainInfo:149) Recreating domain
0, UUID 00000000-0000-0000-0000-000000000000. at /local/domain/0
[2011-07-13 06:35:36 8776] DEBUG (XendDomain:443) Adding Domain: 0
[2011-07-13 06:35:36 8776] DEBUG (XendDomain:379) number of vcpus to use
is 0
[2011-07-13 06:35:36 8776] DEBUG (XendDomainInfo:132)
XendDomainInfo.recreate({'max_vcpu_id': 0, 'cpu_time': 576190711184462L,
'ssidref': 73744, 'hvm': 0, 'shutdown_reason': 0, 'dying': 0,
'online_vcpus': 1, 'domid': 2, 'paus
ed': 0, 'crashed': 0, 'running': 0, 'maxmem_kb': 2097152L, 'shutdown':
0, 'mem_kb': 2097152L, 'handle': [115, 125, 2, 22, 224, 144, 141, 222,
233, 135, 135, 50, 188, 10, 17, 249], 'blocked': 1})
[2011-07-13 06:35:36 8776] INFO (XendDomainInfo:149) Recreating domain
2, UUID 737d0216-e090-8dde-e987-8732bc0a11f9. at /local/domain/2
[2011-07-13 06:35:36 8776] DEBUG (XendDomainInfo:1092)
XendDomainInfo.handleShutdownWatch
[2011-07-13 06:35:37 8776] DEBUG (XendDomain:443) Adding Domain: 2
[2011-07-13 06:35:37 8776] DEBUG (XendDomainInfo:132)
XendDomainInfo.recreate({'max_vcpu_id': 0, 'cpu_time': 16677756695156L,
'ssidref': 73744, 'hvm': 0, 'shutdown_reason': 0, 'dying': 0,
'online_vcpus': 1, 'domid': 3, 'pause
d': 0, 'crashed': 0, 'running': 0, 'maxmem_kb': 262144L, 'shutdown': 0,
'mem_kb': 262144L, 'handle': [157, 213, 214, 223, 183, 17, 225, 225,
231, 247, 133, 104, 14, 200, 1, 221], 'blocked': 1})
[2011-07-13 06:35:37 8776] INFO (XendDomainInfo:149) Recreating domain
3, UUID 9dd5d6df-b711-e1e1-e7f7-85680ec801dd. at /local/domain/3
[2011-07-13 06:35:37 8776] DEBUG (XendDomain:443) Adding Domain: 3
[2011-07-13 06:35:37 8776] DEBUG (XendDomainInfo:132)
XendDomainInfo.recreate({'max_vcpu_id': 0, 'cpu_time': 53612680526673L,
'ssidref': 73744, 'hvm': 0, 'shutdown_reason': 0, 'dying': 0,
'online_vcpus': 1, 'domid': 12, 'paus
ed': 0, 'crashed': 0, 'running': 0, 'maxmem_kb': 1048576L, 'shutdown':
0, 'mem_kb': 1048576L, 'handle': [169, 167, 192, 176, 175, 15, 178, 198,
162, 180, 45, 237, 175, 17, 143, 169], 'blocked': 1})
[2011-07-13 06:35:41 8776] INFO (XendDomainInfo:149) Recreating domain
12, UUID a9a7c0b0-af0f-b2c6-a2b4-2dedaf118fa9. at /local/domain/12
[2011-07-13 06:35:41 8776] DEBUG (XendDomain:443) Adding Domain: 12
[2011-07-13 06:35:41 8776] DEBUG (XendDomainInfo:132)
XendDomainInfo.recreate({'max_vcpu_id': 0, 'cpu_time': 19924498988769L,
'ssidref': 73744, 'hvm': 0, 'shutdown_reason': 0, 'dying': 0,
'online_vcpus': 1, 'domid': 15, 'paus
ed': 0, 'crashed': 0, 'running': 0, 'maxmem_kb': 2097152L, 'shutdown':
0, 'mem_kb': 2097152L, 'handle': [210, 97, 109, 81, 50, 232, 69, 47,
234, 69, 222, 40, 172, 108, 108, 47], 'blocked': 1})
[2011-07-13 06:35:41 8776] INFO (XendDomainInfo:149) Recreating domain
15, UUID d2616d51-32e8-452f-ea45-de28ac6c6c2f. at /local/domain/15
[2011-07-13 06:35:42 8776] DEBUG (XendDomain:443) Adding Domain: 15
[2011-07-13 06:35:42 8776] DEBUG (XendDomainInfo:132)
XendDomainInfo.recreate({'max_vcpu_id': 0, 'cpu_time': 63299717248945L,
'ssidref': 73744, 'hvm': 0, 'shutdown_reason': 0, 'dying': 0,
'online_vcpus': 1, 'domid': 18, 'paus
ed': 0, 'crashed': 0, 'running': 0, 'maxmem_kb': 2097152L, 'shutdown':
0, 'mem_kb': 2097152L, 'handle': [87, 12, 87, 253, 157, 185, 57, 64, 81,
38, 67, 153, 199, 214, 42, 192], 'blocked': 1})
[2011-07-13 06:35:42 8776] INFO (XendDomainInfo:149) Recreating domain
18, UUID 570c57fd-9db9-3940-5126-4399c7d62ac0. at /local/domain/18
[2011-07-13 06:35:42 8776] DEBUG (XendDomain:443) Adding Domain: 18
[2011-07-13 06:35:42 8776] DEBUG (XendDomainInfo:1092)
XendDomainInfo.handleShutdownWatch
[2011-07-13 06:35:42 8776] DEBUG (XendDomainInfo:1092)
XendDomainInfo.handleShutdownWatch
[2011-07-13 06:35:42 8776] DEBUG (XendDomainInfo:1092)
XendDomainInfo.handleShutdownWatch
[2011-07-13 06:35:42 8776] DEBUG (XendDomainInfo:1092)
XendDomainInfo.handleShutdownWatch
[2011-07-13 06:35:42 8776] DEBUG (XendDomainInfo:1092)
XendDomainInfo.handleShutdownWatch
[2011-07-13 06:35:44 8776] ERROR (XendDomainInfo:2619) bridge_to_network
Traceback (most recent call last):
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomainInfo.py", line
2610, in get_dev_xenapi_config
    for (b,ifs) in Brctl.get_state().items()
  File "/usr/lib/xen-3.2-1/lib/python/xen/util/Brctl.py", line 33, in
get_state
    fin = os.popen(CMD_BRCTL + ' show', 'r')
OSError: [Errno 12] Cannot allocate memory
[2011-07-13 06:35:51 8776] ERROR (XendDomainInfo:2619) bridge_to_network
Traceback (most recent call last):
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomainInfo.py", line
2617, in get_dev_xenapi_config
    config.get('bridge')).get_uuid()
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendNode.py", line 501,
in bridge_to_network
    'brctl show | cut -d "\n" -f 2 | cut -f 1')
  File "/usr/lib/python2.5/commands.py", line 53, in getstatusoutput
    pipe = os.popen('{ ' + cmd + '; } 2>&1', 'r')
OSError: [Errno 12] Cannot allocate memory
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call:
VBD.set_device not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call: VBD.set_type
not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call:
session.get_all_records not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call:
event.get_record not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call: event.get_all
not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call:
VM.get_auto_power_on not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call:
VM.set_auto_power_on not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call:
VIF.get_network not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call:
VIF.set_device not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call: VIF.set_MAC
not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call: VIF.set_MTU
not found
[2011-07-13 06:35:53 8776] WARNING (XendAPI:678) API call: debug.get_all
not found
[2011-07-13 06:35:53 8776] ERROR (SrvDaemon:353) Exception starting xend
(can't start new thread)
Traceback (most recent call last):
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/server/SrvDaemon.py",
line 346, in run
    servers.start(status)
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/server/SrvServer.py",
line 117, in start
    thread.start()
  File "/usr/lib/python2.5/threading.py", line 440, in start
    _start_new_thread(self.__bootstrap, ())
error: can't start new thread
[2011-07-13 06:36:09 3509] INFO (SrvDaemon:219) Xend exited with status
1.
---->8---->8---->8----


-- 
Bertrand LUPART


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