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[Xen-users] "xm" dying with "Bad File Descriptor

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Paul Tomblin <ptomblin@xxxxxxxxx>
  • Date: Thu, 24 Jun 2010 11:28:06 -0400
  • Delivery-date: Thu, 24 Jun 2010 08:30:09 -0700
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I recently (in the last 24 hours) succeeded in moving all my domUs from a dom0 that was running on a 686-based server to one that is running on a newer amd64-based server.  I used the latest Debian Stable for both.  The domUs are all running fine, but in the last few hours I've discovered that the "xm" command is dying with an error "Error: (9, 'Bad file descriptor')".  /var/log/xen/xend-debug.log seems to imply that a socket has shut down:

Traceback (most recent call last):
  File "/usr/lib/python2.5/SocketServer.py", line 464, in process_request_thread
    self.finish_request(request, client_address)
  File "/usr/lib/python2.5/SocketServer.py", line 254, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/usr/lib/xen-3.2-1/lib/python/xen/util/xmlrpclib2.py", line 106, in <lambda>
    requestHandler(allowed, x, y, z)),
  File "/usr/lib/xen-3.2-1/lib/python/xen/util/xmlrpclib2.py", line 65, in __init__
  File "/usr/lib/python2.5/SocketServer.py", line 522, in __init__
  File "/usr/lib/python2.5/BaseHTTPServer.py", line 316, in handle
  File "/usr/lib/python2.5/BaseHTTPServer.py", line 310, in handle_one_request
  File "/usr/lib/xen-3.2-1/lib/python/xen/util/xmlrpclib2.py", line 82, in do_POST
  File "/usr/lib/python2.5/BaseHTTPServer.py", line 368, in send_response
    (self.protocol_version, code, message))
  File "/usr/lib/python2.5/socket.py", line 274, in write
  File "/usr/lib/python2.5/socket.py", line 261, in flush
error: (32, 'Broken pipe')

I've seen numerous mentions of this error on the net, including a Bugzilla bug filed over a year ago.  Does anybody know what causes this, and is there a way to recover short of rebooting every time it happens?  My xen setup ran flawlessly for several years on the old server, and I'm hoping the new one will work as well.

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