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Bertrand LUPART

2011-Aug-09 09:48 UTC

[Xen-users] Restarting xend while domU are running

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


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

David Markey

2011-Aug-09 11:46 UTC

head link

Re: [Xen-users] Restarting xend while domU are running

It looks like there isnt enough memory to start xend..

How much free memory have you got

On 9 August 2011 10:48, Bertrand LUPART <bertrand.lupart@linkeo.com>
wrote:
> 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
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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

Simon Hobson

2011-Aug-09 12:05 UTC

head link

Re: [Xen-users] Restarting xend while domU are running

Bertrand LUPART wrote:>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?
Due to a bug in the combination of Xen and kernel I''ve been running, 
I''ve often had to restart xend with guests running. The process had 
been :
guest ''hangs'' with 100% CPU usage
stop xend
kill xenconsoled
start xend
guest ''comes back to life''

So I''d say it''s generally safe - but *don''t*
stop/restart xenstored !

However, while playing around with Xen4.0, I did find a setting to 
"shutdown guests when stopping xend" - I haven''t experimented
yet as
to how that affects the situation.

-- 
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
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Bertrand LUPART

2011-Aug-09 12:42 UTC

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[Xen-users] Re: Restarting xend while domU are running

> It looks like there isnt enough memory to start xend..
> 
> How much free memory have you got
Yes, there have been some problem on the Dom0 at the time it crashed.

I guess it''s now OK and xend will start if asked to do so.


> On 9 August 2011 10:48, Bertrand LUPART <bertrand.lupart@linkeo.com>
wrote:
> 
> > 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,
-- 
Bertrand LUPART


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Bertrand LUPART

2011-Aug-09 12:43 UTC

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[Xen-users] Re: Restarting xend while domU are running

> >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?
> 
> Due to a bug in the combination of Xen and kernel I''ve been
running,
> I''ve often had to restart xend with guests running. The process
had
> been :
> guest ''hangs'' with 100% CPU usage
> stop xend
> kill xenconsoled
> start xend
> guest ''comes back to life''
> 
> So I''d say it''s generally safe - but *don''t*
stop/restart xenstored !
> 
> However, while playing around with Xen4.0, I did find a setting to 
> "shutdown guests when stopping xend" - I haven''t
experimented yet as
> to how that affects the situation.
On this Debian box, restarting xend did the trick.

----8<----8<----8<----
$ sudo /etc/init.d/xend start
---->8---->8---->8----

Thank you very much.

-- 
Bertrand LUPART


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Xen users - Aug 2011 - Restarting xend while domU are running

[Xen-users] Restarting xend while domU are running

Re: [Xen-users] Restarting xend while domU are running

Re: [Xen-users] Restarting xend while domU are running

[Xen-users] Re: Restarting xend while domU are running

[Xen-users] Re: Restarting xend while domU are running