Queue errors

[pnorman]

when running tilekiln prometheus I get

$ tilekiln/bin/tilekiln prometheus --storage-dbname tiles
Running prometheus exporter on http://0.0.0.0:10013/
Exception in thread pool-1-worker-0:
Exception in thread pool-1-worker-1:
Traceback (most recent call last):
Traceback (most recent call last):
  File "/usr/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
Exception in thread pool-1-worker-2:
  File "/usr/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
Traceback (most recent call last):
  File "/usr/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.11/threading.py", line 975, in run
    self.run()
  File "/usr/lib/python3.11/threading.py", line 975, in run
    self.run()
  File "/usr/lib/python3.11/threading.py", line 975, in run
    self._target(*self._args, **self._kwargs)
  File "/home/pnorman/spirit/tilekiln/lib/python3.11/site-packages/psycopg_pool/pool.py", line 577, in worker
    self._target(*self._args, **self._kwargs)
    self._target(*self._args, **self._kwargs)
  File "/home/pnorman/spirit/tilekiln/lib/python3.11/site-packages/psycopg_pool/pool.py", line 577, in worker
  File "/home/pnorman/spirit/tilekiln/lib/python3.11/site-packages/psycopg_pool/pool.py", line 577, in worker
    task = q.get()
    task = q.get()
           ^^^^^^^
    task = q.get()
  File "/home/pnorman/spirit/tilekiln/lib/python3.11/site-packages/psycopg_pool/_acompat.py", line 74, in get
           ^^^^^^^
           ^^^^^^^
  File "/home/pnorman/spirit/tilekiln/lib/python3.11/site-packages/psycopg_pool/_acompat.py", line 74, in get
    return super().get(block, timeout)
  File "/home/pnorman/spirit/tilekiln/lib/python3.11/site-packages/psycopg_pool/_acompat.py", line 74, in get
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    return super().get(block, timeout)
    return super().get(block, timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/queue.py", line 179, in get
  File "/usr/lib/python3.11/queue.py", line 179, in get
  File "/usr/lib/python3.11/queue.py", line 179, in get
    raise Empty
_queue.Empty
    raise Empty
    raise Empty
_queue.Empty
_queue.Empty

Related #26