Re: [Xen-users] network is unstable

[xen jones <xenwe@xxxxxxxxx>]

Hello All:

 

Here comes again after reboot and it lasts about an hour.

This time, my xen machine is unable to ping anywhere including other subnect 192.168.213 and external server like ping yahoo.com.  Again, after reboot, thie srror will be gone. How is it happended ?

 

Here is the xen debug log file. Maybe it will help debugging:

 

recv_fe_interface_connect {'tx_shmem_frame': 207715, 'rx_shmem_frame': 207716, 'handle': 0}
VIRTUAL MEMORY ARRANGEMENT:
 Loaded kernel: c0100000->c02deb54
 Init. ramdisk: c02df000->c02df000
 Phys-Mach map: c02df000->c02ef000
 Page tables:   c02ef000->c02f1000
 Start info:    c02f1000->c02f2000
 Boot stack:    c02f2000->c02f3000
 TOTAL:         c0000000->c0400000
 ENTRY ADDRESS: c0100000
ioctl: LOOP_SET_FD: Device or resource busy
ioctl: LOOP_SET_FD: Device or resource busy
/dev/loop10: No such device
/dev/loop11: No such device
/dev/loop12: No such device
/dev/loop13: No such device
/dev/loop14: No such device
/dev/loop15: No such device
ioctl: LOOP_SET_FD: Device or resource busy
ioctl: LOOP_SET_FD: Device or resource busy
ioctl: LOOP_SET_FD: Device or resource busy
ioctl: LOOP_SET_FD: Device or resource busy
ioctl: LOOP_SET_FD: Device or resource busy
vif-bridge up vif=vif27.0 domain=fangcb24_file mac=aa:00:00:47:a3:c7 bridge=xen-br0
recv_fe_driver_status> {'status': 1}

recv_fe_driver_status>

recv_fe_interface_connect {'tx_shmem_frame': 66932, 'rx_shmem_frame': 66933, 'handle': 0}
VIRTUAL MEMORY ARRANGEMENT:
 Loaded kernel: c0100000->c02deb54
 Init. ramdisk: c02df000->c02df000
 Phys-Mach map: c02df000->c02ef000
 Page tables:   c02ef000->c02f1000
 Start info:    c02f1000->c02f2000
 Boot stack:    c02f2000->c02f3000
 TOTAL:         c0000000->c0400000
 ENTRY ADDRESS: c0100000
vif-bridge up vif=vif28.0 domain=fangweb1 mac=aa:00:00:5b:10:a9 bridge=xen-br0
vif-bridge down vif=vif28.0 domain=DOM28 mac=aa:00:00:5b:10:a9 bridge=xen-br0
Unhandled error in Deferred:
Traceback (most recent call last):
  File "/usr/lib/python/xen/xend/server/controller.py", line 202, in callResponders
    resp.responseReceived(msg)
  File "/usr/lib/python/xen/xend/server/controller.py", line 37, in responseReceived
    self.deferred.callback(msg)
  File "/usr/lib/python2.2/site-packages/twisted/internet/defer.py", line 252, in callback
    self._startRunCallbacks(result)
  File "/usr/lib/python2.2/site-packages/twisted/internet/defer.py", line 313, in _startRunCallbacks
    self._runCallbacks()
--- <exception caught here> ---
  File "/usr/lib/python2.2/site-packages/twisted/internet/defer.py", line 338, in _runCallbacks
    self.result = callback(self.result, *args, **kw)
  File "/usr/lib/python/xen/xend/server/blkif.py", line 477, in respond_be_vbd_grow
    raise XendError("Adding extent to vbd failed: device %s, error %d"
xen.xend.XendError.XendError: Adding extent to vbd failed: device (vbd (uname phy:/dev/sda8) (dev sda1) (mode w)), error 8

Thanks in advance !

 

Jeremy

xen jones <xenwe@xxxxxxxxx> wrote:

Hello All:

 

Sorry I need to add more in regarding this issue. The best term would be "intermittent network hangs" as I see similar mails from the user group.

 

Here is problem I found:

 

My xen domain 0 has ip: 192.168.204.225.

It can ping with other networks like 192.168.213 subnet and outside like yahoo.com

but it can not ping 192.168.204 subnet except 192.168.204.1 which is the gateway address.

 

Please help ....

 

Thanks

 

Jeremy

 

 

xen jones <xenwe@xxxxxxxxx> wrote:

Hi:

 

I am able to run xend start and all my Guest OSs are running fine. However, it is very unstable after a while. I can not ping other servers which used to be working fine.

 

My netstat -nr output and my /etc/resolv.conf are fine also.

 

The only way to temparaily fix it is to reboot the server. But after a while, it failed to ping other servers again.

 

Anyone has any suggestions how to troubleshoot ?

 

Thanks,

 

Jeremy

 

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