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qemu io test: spurious failures of 030


From: Christian Borntraeger
Subject: qemu io test: spurious failures of 030
Date: Thu, 10 Jun 2021 09:54:04 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0

Folks,

I have CI on s390 on qemu/master for each commit. And from time to time I do 
get spurious failures of 030. (always 030 and nothing else).
I have a hard time reproducing this manually so I cannot debug this at the 
moment. Has anyone seen this as well?


    030                             ...        [09:34:06]              ...      
            030                             fail       [09:34:06] [09:34:09]   
3.2s                 failed, exit status 1
    --- tests/qemu-iotests/030.out
    +++ 030.out.bad
    @@ -1,5 +1,45 @@
    -...........................
    +.............WARNING:qemu.machine.machine:qemu received signal 11; command: 
"build/tests/qemu-iotests/../../qemu-system-s390x -display none -vga none -chardev 
socket,id=mon,path=/tmp/tmpt3vg8hqd/qemu-2816608-monitor.sock -mon 
chardev=mon,mode=control -qtest unix:path=/tmp/tmpt3vg8hqd/qemu-2816608-qtest.sock -accel 
qtest -nodefaults -display none -accel qtest -drive 
if=virtio,id=drive0,file=/tmp/devel-iotests-9771/img-8.img,format=qcow2,cache=writeback,aio=threads,backing.backing.backing.backing.backing.backing.backing.backing.node-name=node0,backing.backing.backing.backing.backing.backing.backing.node-name=node1,backing.backing.backing.backing.backing.backing.node-name=node2,backing.backing.backing.backing.backing.node-name=node3,backing.backing.backing.backing.node-name=node4,backing.backing.backing.node-name=node5,backing.backing.node-name=node6,backing.node-name=node7,node-name=node8"
    +EE.............
    +======================================================================
    +ERROR: test_stream_parallel (__main__.TestParallelOps)
    +----------------------------------------------------------------------
    +Traceback (most recent call last):
    +  File "tests/qemu-iotests/030", line 260, in test_stream_parallel
    +    for event in self.vm.get_qmp_events(wait=True):
    +  File "tests/qemu-iotests/../../python/qemu/machine/machine.py", line 
597, in get_qmp_events
    +    events = self._qmp.get_events(wait=wait)
    +  File "tests/qemu-iotests/../../python/qemu/qmp/__init__.py", line 338, 
in get_events
    +    self.__get_events(wait)
    +  File "tests/qemu-iotests/../../python/qemu/qmp/__init__.py", line 207, 
in __get_events
    +    raise QMPConnectError("Error while reading from socket")
    +qemu.qmp.QMPConnectError: Error while reading from socket
    +
    +======================================================================
    +ERROR: test_stream_parallel (__main__.TestParallelOps)
    +----------------------------------------------------------------------
    +Traceback (most recent call last):
    +  File "tests/qemu-iotests/../../python/qemu/machine/machine.py", line 
489, in _do_shutdown
    +    self._soft_shutdown(timeout, has_quit)
    +  File "tests/qemu-iotests/../../python/qemu/machine/machine.py", line 
469, in _soft_shutdown
    +    self._qmp.cmd('quit')
    +  File "tests/qemu-iotests/../../python/qemu/qmp/__init__.py", line 288, 
in cmd
    +    return self.cmd_obj(qmp_cmd)
    +  File "tests/qemu-iotests/../../python/qemu/qmp/__init__.py", line 266, 
in cmd_obj
    +    self.__sock.sendall(json.dumps(qmp_cmd).encode('utf-8'))
    +BrokenPipeError: [Errno 32] Broken pipe
    +
    +The above exception was the direct cause of the following exception:
    +
    +Traceback (most recent call last):
    +  File "tests/qemu-iotests/030", line 227, in tearDown
    +    self.vm.shutdown()
    +  File "tests/qemu-iotests/../../python/qemu/machine/machine.py", line 
519, in shutdown
    +    self._do_shutdown(timeout, has_quit)
    +  File "tests/qemu-iotests/../../python/qemu/machine/machine.py", line 
492, in _do_shutdown
    +    raise AbnormalShutdown("Could not perform graceful shutdown") \
    +qemu.machine.machine.AbnormalShutdown: Could not perform graceful shutdown
    +
     ----------------------------------------------------------------------
     Ran 27 tests
-OK
    +FAILED (errors=2)



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