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[libvirt] error: server response too large



Hi.

When trying to do a screenshot of a remote domain connected via
qemu+tcp (for testing purposes only), I receive this error:

----------------------------------------------------------------------
virsh -c qemu+tcp://dev/system
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # version
Compiled against library: libvir 0.9.8
Using library: libvir 0.9.8
Using API: QEMU 0.9.8
Running hypervisor: QEMU 1.5.1

virsh # screenshot 2 /tmp/screendump
error: could not receive data from domain 2
error: packet 1048600 bytes received from server too large, want 262144

virsh # 2013-09-30 14:47:05.158+0000: 21646: info : libvirt version: 0.9.8
2013-09-30 14:47:05.158+0000: 21646: warning : virNetClientIncomingEvent:1660 : Something went wrong during async message processing
----------------------------------------------------------------------

I'm using Ubuntu LTS 12.04.3, latest version in the repo which is
0.9.8-2ubuntu17.13.

On the server side, I'm using a self-compiled libvirt from git master.

On the server, I receive:

2013-09-30 14:41:10.075+0000: 1203: info : libvirt version: 1.1.2
2013-09-30 14:41:10.075+0000: 1203: error : virNetSocketWriteWire:1446 : Cannot write data: Connection reset by peer
2013-09-30 14:41:10.077+0000: 1203: error : virFDStreamCloseInt:315 : internal error: I/O helper exited abnormally
2013-09-30 14:41:10.078+0000: 1203: error : virFDStreamUpdateCallback:133 : internal error: stream is not open


I've uploaded the logs produced with LIBVIRT_DEBUG=1 to sendspace:

http://www.sendspace.com/file/tevueo (libvirtd.log.gz) [1MB]
http://www.sendspace.com/file/rdpmrh (virsh.log.gz) [5KB]


When using a non-async virStream with client library version 1.1.2, it
works OK.

Is this a bug in libvirt 0.9.8 or is this a regression in >= 1.1.2?

I started to git bisect but ran out of time, I'm out of office till
next week.

Any help would be great. Thanks.

Claudio
-- 
AV-Test GmbH, Henricistra├če 20, 04155 Leipzig, Germany
Phone: +49 341 265 310 19
Web:<http://www.av-test.org>

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Geschaeftsfuehrer (CEO): Andreas Marx, Guido Habicht, Maik Morgenstern


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