<div dir="ltr">Hello community,<div><br></div><div>   I am trying to inspect a migration failure using the steps described here (<a href="https://wiki.qemu.org/Features/Migration/Troubleshooting#:~:text=on%20graphics%20emulation.-,load%20of%20migration%20failed%3A%20Input%2Foutput%20error,are%20a%20few%20failure%20cases.&text=Something%20kills%2Fcancels%20the%20migration,killed%20before%20migration%20is%20complete.&text=A%20migration%20failure%20on%20the%20source.">https://wiki.qemu.org/Features/Migration/Troubleshooting#:~:text=on%20graphics%20emulation.-,load%20of%20migration%20failed%3A%20Input%2Foutput%20error,are%20a%20few%20failure%20cases.&text=Something%20kills%2Fcancels%20the%20migration,killed%20before%20migration%20is%20complete.&text=A%20migration%20failure%20on%20the%20source.</a>). In the fourth step, it suggests using migrate 'exec:cat > /dev/null' to try dumping vm state on the source node. Since the virtual machine is controlled by libvirt, I suppose I could using the following command,</div><div><br></div><div>virsh qemu-monitor-command --hmp <instance-id> 'migrate "exec:cat > /dev/nulll"<br clear="all"><div><br></div><div>but it failed with 2023-02-24T02:56:07.347307Z qemu-system-x86_64: Unable to write to command: Broken pipe</div><div><br></div><div>So my question is how to use this command using libvirt? Thank you very much for the help.</div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><br><div>Best Regards,</div><div><br></div><div>Jiatong Shen</div></div></div></div></div>