[Qemu-devel] [Bug 1156632] Re: not receiving RESET event after system_reset command causes QMP connection to die

[Thomas Huth]

Triaging old bug tickets... can you still reproduce this issue with the
latest version of QEMU? Or could we close this ticket nowadays?

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1156632

Title:
  not receiving RESET event after system_reset command causes QMP
  connection to die

Status in QEMU:
  Incomplete

Bug description:
  I have written my own implementation to control machine running KVM
  instances with the QMP protocol. Its a pretty basic implementation
  that sends/receives in the same thread. This means that all of the
  events QEMU sents are received only when the application expects a
  reply from a command. In the following scenario, i'm unable to
  (re)connect to the QMP socket from QEMU after I closed the connection:

  1) Connect to QMP 
  2) Sent qmp_capabilities
  3) Receive reply
  4) Send system_reset
  5) Receive reply
  6) close socket
  7) Connect to socket -> connection refused

  However, in the following scenario, I am able to connect after I disconnect 
the socket because I have read the two RESET events:
  1) Connect to QMP 
  2) Sent qmp_capabilities
  3) Receive reply
  4) Send system_reset
  5) Receive reply
  6) Receive reply (is a RESET event)
  7) Receive reply (is a RESET event)
  8) close socket
  9) Connect to socket -> ok

  I don't know if this is a bug or expected behavior. I can't find any
  proper way to disconnect the socket documentated. Am I doïng something
  wrong, or is this a bug in the QMP implementation of QEMU?

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