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qmp: Check for returned data from __json_read in get_events

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When QEMU process aborts and socket is closed, qmp client will not
detect it. When this happens, some qemu-iotests scripts will enter an
endless loop waiting for qmp events.

It's better we raise an exception in qmp.py to catch this and make the
test script stop.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Fam Zheng 2014-02-24 13:45:01 +08:00 committed by Luiz Capitulino
parent 7d6dc7f30c
commit 4864512389
1 changed files with 6 additions and 1 deletions
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7
scripts/qmp/qmp.py
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@ -171,7 +171,12 @@ class QEMUMonitorProtocol:
pass
self.__sock.setblocking(1)
if not self.__events and wait:
self.__json_read(only_event=True)
ret = self.__json_read(only_event=True)
if ret == None:
# We are in blocking mode, if don't get anything, something
# went wrong
raise QMPConnectError("Error while reading from socket")
return self.__events
def clear_events(self):