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[libvirt] fail to convert qemu xml to args with libvirt-1.0.4: An error occurred, but the cause is unknown



Hi,

I used to convert qemu XML to args with libvirt-1.0.3.
But it failed to convert with libvirt-1.0.4.

# virsh domxml-to-native qemu-argv test.xml >test.sh
error: An error occurred, but the cause is unknown


Comparing the debug file as below:
1) lbvirt-1.0.3
<cut>
2013-04-09 03:23:47.296+0000: 2669: debug : virEventPollInterruptLocked:716 : Interrupting
2013-04-09 03:23:47.296+0000: 2669: debug : virNetClientIO:1807 : All done with our call head=(nil) call=0x100871c0 rv=0
2013-04-09 03:23:47.297+0000: 2670: debug : virEventPollRunOnce:640 : Poll got 1 event(s)
2013-04-09 03:23:47.297+0000: 2670: debug : virEventPollDispatchTimeouts:425 : Dispatch 0
2013-04-09 03:23:47.297+0000: 2669: debug : virNetMessageFree:73 : msg=0x10087500 nfds=0 cb=(nil)
2013-04-09 03:23:47.297+0000: 2670: debug : virEventPollDispatchHandles:470 : Dispatch 1
2013-04-09 03:23:47.297+0000: 2670: debug : virEventPollDispatchHandles:484 : i=0 w=1
2013-04-09 03:23:47.297+0000: 2669: debug : virConnectClose:1483 : conn=0x100878b8
<cut>

2) libvirt-1.0.4
<cut>
2013-04-09 03:07:58.012+0000: 2834: debug : virEventPollInterruptLocked:716 : Interrupting
2013-04-09 03:07:58.012+0000: 2834: debug : virNetClientIO:1810 : All done with our call head=(nil) call=0x10089db8 rv=0
2013-04-09 03:07:58.012+0000: 2835: debug : virEventPollRunOnce:640 : Poll got 1 event(s)
2013-04-09 03:07:58.012+0000: 2835: debug : virEventPollDispatchTimeouts:425 : Dispatch 0
2013-04-09 03:07:58.012+0000: 2834: error : virNetClientProgramDispatchError:175 : An error occurred, but the cause is unknown
2013-04-09 03:07:58.012+0000: 2835: debug : virEventPollDispatchHandles:470 : Dispatch 1
2013-04-09 03:07:58.012+0000: 2834: debug : virNetMessageFree:73 : msg=0x1008a0f8 nfds=0 cb=(nil)
2013-04-09 03:07:58.012+0000: 2835: debug : virEventPollDispatchHandles:484 : i=0 w=1
2013-04-09 03:07:58.012+0000: 2835: debug : virEventPollDispatchHandles:498 : EVENT_POLL_DISPATCH_HANDLE: watch=1 events=1
2013-04-09 03:07:58.012+0000: 2835: debug : virEventPollCleanupTimeouts:516 : Cleanup 0
2013-04-09 03:07:58.013+0000: 2835: debug : virEventPollCleanupTimeouts:552 : Found 0 out of 0 timeout slots used, releasing 0
2013-04-09 03:07:58.013+0000: 2835: debug : virEventPollCleanupHandles:564 : Cleanup 2
2013-04-09 03:07:58.013+0000: 2834: debug : virConnectClose:1483 : conn=0x1008a4b0
<cut>


How can I debug this cause unknown error?

Best Regards,
Olivia



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