error.log

Traceback (most recent call last):
  File "/nix/store/cqh3nsk4z8lc960g8yqvz5nf2f6qx9v0-python3-3.8.6/lib/python3.8/wsgiref/handlers.py", line 137, in run
    self.result = application(self.environ, self.start_response)
  File "/nix/store/44mdky9gy83n5w2gsqfldr1sgssg4v00-python3.8-prometheus_client-0.8.0/lib/python3.8/site-packages/prometheus_client/exposition.py", line 52, in prometheus_app
    status, header, output = _bake_output(registry, accept_header, params)
  File "/nix/store/44mdky9gy83n5w2gsqfldr1sgssg4v00-python3.8-prometheus_client-0.8.0/lib/python3.8/site-packages/prometheus_client/exposition.py", line 40, in _bake_output
    output = encoder(registry)
  File "/nix/store/44mdky9gy83n5w2gsqfldr1sgssg4v00-python3.8-prometheus_client-0.8.0/lib/python3.8/site-packages/prometheus_client/exposition.py", line 106, in generate_latest
    for metric in registry.collect():
  File "/nix/store/44mdky9gy83n5w2gsqfldr1sgssg4v00-python3.8-prometheus_client-0.8.0/lib/python3.8/site-packages/prometheus_client/registry.py", line 82, in collect
    for metric in collector.collect():
  File "./hydra-reexporter.py", line 213, in collect
    self.destructive_read("memoryTokensInUse")
  File "./hydra-reexporter.py", line 409, in destructive_read
    return self._status.destructive_read(key)
  File "./hydra-reexporter.py", line 35, in destructive_read
    val = self.preserving_read(key)
  File "./hydra-reexporter.py", line 20, in preserving_read
    val = self._state[key]
KeyError: 'memoryTokensInUse'