Acquired resources prevent exporter from reregistering resources after restart

[Emantor]

1. Coordinator and Exporter are running
2. User locks a board which acquires resources from the exporter
3. Exporter requires a restart due to changed configuration
4. Shutdown of the exporter results in the following messages (at the coordinator):

   Oct 02 10:38:56 labgrid crossbar[16844]: [Guest       16856] failed to release ResourceImport(data={'cls': 'NetworkSerialPort', 'avail': True, 'acquired': '10015', 'params': {'port': 4015, 'host': '192.168.23.5'}}, path=('rl10-srv', '10015', 'NetworkSerialPort', 'NetworkSerialPort'))

5. After restart the resources from the exporter are reregistered at the coordinator but do not show up in client calls, shows of places produce:

   > lgc -p device show                                                                                                                                                                                  ✔  10:48
   Place 'device':
   aliases: some-alias
   matches:
   rl10-srv/rl10-usb-oben-p8/NetworkSerialPort
   rl10-srv/10016/NetworkPowerPort
   rl10-srv/rl10-usb-oben-p5/NetworkIMXUSBLoader
   rl10-srv/wago-slice3-do1/ModbusTCPCoil
   rl10-srv/rl10-usb-oben-p5/NetworkAndroidFastboot/AndroidFastboot
   acquired: some-computer/rcz
   acquired resources:
   rl10-srv/10016/NetworkPowerPort/NetworkPowerPort
   rl10-srv/rl10-usb-oben-p5/NetworkAndroidFastboot/AndroidFastboot
   rl10-srv/rl10-usb-oben-p5/NetworkIMXUSBLoader/IMXUSBLoader
   rl10-srv/rl10-usb-oben-p8/NetworkSerialPort/USBSerialPort
   rl10-srv/wago-slice3-do1/ModbusTCPCoil/ModbusTCPCoil
   created: 2019-01-21 12:11:21.504197
   changed: 2019-10-02 10:48:32.111486
   Traceback (most recent call last):
   File "/usr/ptx-venvs/labgrid/lib/python3.7/site-packages/labgrid/remote/client.py", line 1529, in main
   session.loop.run_until_complete(coro)
   File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
   return future.result()
   File "/usr/ptx-venvs/labgrid/lib/python3.7/site-packages/labgrid/remote/client.py", line 360, in print_place
   resource = self.resources[exporter][group_name][resource_name]
   KeyError: 'rl10-srv'

We should release the acquired resources on the exporter when the exporter disconnects unconditionally. Meanwhile the workaround is to release all places with acquired resources from the exporter and restarting the exporter, than registration works correctly again.

[Bastian-Krause]

I've never seen this. Does this still happen?

[Emantor]

I haven't seen this issue in a while and our internal logs contain no mention of this, closing.