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[Qemu-discuss] QEMU deleting unix socket after connection closes

From: Petr Kotas
Subject: [Qemu-discuss] QEMU deleting unix socket after connection closes
Date: Tue, 2 Apr 2019 17:35:15 +0200


I probably need help with explaining how QEMU treats the VNC through unix

I am dealing with the issue where QEMU deletes opened unix socket file
after closing the connection. I would like to understand how it should
behave so I can diagnose where exactly the issue is in my system.
I am solving the issue where VNC connection disappears randomly. I have
pinpoint that the cause is disappearing VNC socket file.

The opened socket is in directory:

When I read from the socket using socat redirecting to stdout and close
with ctrl+c the file virt-vnc goes away. Should the file stay there opened
or should it be deleted?
If the deletion is ok, why it is being deleted?

I am using qemu-kvm v 3.1.0.

Also the websocket is still registered on the system:
address@hidden 09c05242-5559-11e9-95f4-525500d15501]# ss -l
NetidState  Recv-Q
Local Address:Port          Peer Address:Port
u_strLISTEN 0       1
2861579                  * 0

And qemu monitor still sees the socket connection
address@hidden 09c05242-5559-11e9-95f4-525500d15501]# virsh
qemu-monitor-command --hmp default_vmi-fedora 'info vnc'
    Auth: none (Sub: none)

Thank you for clarification and help.

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