Slow RTD builds - Githubissues

Looks like one of the tutorials is failing because it is taking forever.
/home/docs/checkouts/readthedocs.org/user_builds/mitiq/checkouts/2034/docs/source/examples/calibration-tutorial.md: WARNING: Executing notebook failed: CellTimeoutError [mystnb.exec]
I clicked on view raw of this RTD build.
/home/docs/checkouts/readthedocs.org/user_builds/mitiq/checkouts/2034/docs/source/examples/calibration-tutorial.md: Executing notebook using local CWD [mystnb] ERROR - Timeout waiting for execute reply (600s).
Edit: More info about the cell execution error from RTD.
https://mitiq.readthedocs.io/en/stable/examples/calibration-tutorial.html
---------------------------------------------------------------------------
KeyboardInterrupt                         Traceback (most recent call last)
Cell In[8], line 2
      1 cal = Calibrator(execute_calibration, frontend="qiskit", settings=RBSettings)
----> 2 cal.run(log=True)

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/calibration/calibrator.py:329, in Calibrator.run(self, log)
    327         with warnings.catch_warnings():
    328             warnings.simplefilter("ignore", UserWarning)
--> 329             mitigated_value = strategy.mitigation_function(
    330                 circuit, expval_executor
    331             )
    332         self.results.add_result(
    333             strategy,
    334             problem,
   (...)
    337             mitigated_val=mitigated_value,
    338         )
    340 self.results.ensure_full()

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/zne/zne.py:62, in execute_with_zne(circuit, executor, observable, factory, scale_noise, num_to_average)
     59 if num_to_average < 1:
     60     raise ValueError("Argument `num_to_average` must be a positive int.")
---> 62 return factory.run(
     63     circuit, executor, observable, scale_noise, int(num_to_average)
     64 ).reduce()

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/zne/inference.py:567, in BatchedFactory.run(self, qp, executor, observable, scale_noise, num_to_average)
    560         res.extend(
    561             executor.evaluate(
    562                 circuit, observable, force_run_all=True, **kwargs
    563             )
    564         )
    565 else:
    566     # Else, run all circuits.
--> 567     res = executor.evaluate(
    568         to_run, observable, force_run_all=True, **kwargs_list[0]
    569     )
    571 # Reshape "res" to have "num_to_average" columns
    572 reshaped = np.array(res).reshape((-1, num_to_average))

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/executor/executor.py:178, in Executor.evaluate(self, circuits, observable, force_run_all, **kwargs)
    175     result_step = 1
    177 # Run all required circuits.
--> 178 all_results = self.run(all_circuits, force_run_all, **kwargs)
    180 # Parse the results.
    181 if self._executor_return_type in FloatLike:

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/executor/executor.py:253, in Executor.run(self, circuits, force_run_all, **kwargs)
    251 if not self.can_batch:
    252     for circuit in to_run:
--> 253         self._call_executor(circuit, **kwargs)
    255 else:
    256     stop = len(to_run)

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/executor/executor.py:290, in Executor._call_executor(self, to_run, **kwargs)
    280 def _call_executor(
    281     self, to_run: Union[QPROGRAM, Sequence[QPROGRAM]], **kwargs: Any
    282 ) -> None:
    283     """Calls the executor on the input circuit(s) to run. Stores the
    284     executed circuits in ``self._executed_circuits`` and the quantum
    285     results in ``self._quantum_results``.
   (...)
    288         to_run: Circuit(s) to run.
    289     """
--> 290     result = self._executor(to_run, **kwargs)
    291     self._calls_to_executor += 1
    293     if self.can_batch:

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/calibration/calibrator.py:396, in convert_to_expval_executor.<locals>.expval_executor(circuit)
    392 if not cirq.is_measurement(circuit_with_meas):
    393     circuit_with_meas.append(
    394         cirq.measure(circuit_with_meas.all_qubits())
    395     )
--> 396 raw = cast(MeasurementResult, executor.run([circuit_with_meas])[0])
    397 distribution = raw.prob_distribution()
    398 return distribution.get(bitstring, 0.0)

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/executor/executor.py:260, in Executor.run(self, circuits, force_run_all, **kwargs)
    258     for i in range(int(np.ceil(stop / step))):
    259         batch = to_run[i * step : (i + 1) * step]
--> 260         self._call_executor(batch, **kwargs)
    262 results = self._quantum_results[start_result_index:]
    264 if not force_run_all:
    265     # Expand computed results to all results using counts.

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/executor/executor.py:290, in Executor._call_executor(self, to_run, **kwargs)
    280 def _call_executor(
    281     self, to_run: Union[QPROGRAM, Sequence[QPROGRAM]], **kwargs: Any
    282 ) -> None:
    283     """Calls the executor on the input circuit(s) to run. Stores the
    284     executed circuits in ``self._executed_circuits`` and the quantum
    285     results in ``self._quantum_results``.
   (...)
    288         to_run: Circuit(s) to run.
    289     """
--> 290     result = self._executor(to_run, **kwargs)
    291     self._calls_to_executor += 1
    293     if self.can_batch:

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/calibration/calibrator.py:273, in Calibrator.__init__.<locals>.cirq_execute(circuits)
    268 def cirq_execute(
    269     circuits: Sequence[cirq.Circuit],
    270 ) -> Sequence[MeasurementResult]:
    271     q_programs = [convert_from_mitiq(c, frontend) for c in circuits]
    272     results = cast(
--> 273         Sequence[MeasurementResult], self.executor.run(q_programs)
    274     )
    275     return results

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/executor/executor.py:253, in Executor.run(self, circuits, force_run_all, **kwargs)
    251 if not self.can_batch:
    252     for circuit in to_run:
--> 253         self._call_executor(circuit, **kwargs)
    255 else:
    256     stop = len(to_run)

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/mitiq/executor/executor.py:290, in Executor._call_executor(self, to_run, **kwargs)
    280 def _call_executor(
    281     self, to_run: Union[QPROGRAM, Sequence[QPROGRAM]], **kwargs: Any
    282 ) -> None:
    283     """Calls the executor on the input circuit(s) to run. Stores the
    284     executed circuits in ``self._executed_circuits`` and the quantum
    285     results in ``self._quantum_results``.
   (...)
    288         to_run: Circuit(s) to run.
    289     """
--> 290     result = self._executor(to_run, **kwargs)
    291     self._calls_to_executor += 1
    293     if self.can_batch:

Cell In[6], line 4, in execute_calibration(qiskit_circuit)
      2 """Execute the input circuits and return the measurement results."""
      3 noisy_backend = FakeJakarta()
----> 4 noisy_result = noisy_backend.run(qiskit_circuit, shots=shots).result()
      5 noisy_counts = noisy_result.get_counts(qiskit_circuit)
      6 noisy_counts = { k.replace(" ",""):v for k, v in noisy_counts.items()}

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/qiskit_aer/jobs/utils.py:42, in requires_submit.<locals>._wrapper(self, *args, **kwargs)
     40 if self._future is None:
     41     raise JobError("Job not submitted yet!. You have to .submit() first!")
---> 42 return func(self, *args, **kwargs)

File ~/checkouts/readthedocs.org/user_builds/mitiq/envs/stable/lib/python3.10/site-packages/qiskit_aer/jobs/aerjob.py:114, in AerJob.result(self, timeout)
     96 @requires_submit
     97 def result(self, timeout=None):
     98     # pylint: disable=arguments-differ
     99     """Get job result. The behavior is the same as the underlying
    100     concurrent Future objects,
    101 
   (...)
    112         concurrent.futures.CancelledError: if job cancelled before completed.
    113     """
--> 114     return self._future.result(timeout=timeout)

File ~/.asdf/installs/python/3.10.13/lib/python3.10/concurrent/futures/_base.py:453, in Future.result(self, timeout)
    450 elif self._state == FINISHED:
    451     return self.__get_result()
--> 453 self._condition.wait(timeout)
    455 if self._state in [CANCELLED, CANCELLED_AND_NOTIFIED]:
    456     raise CancelledError()

File ~/.asdf/installs/python/3.10.13/lib/python3.10/threading.py:320, in Condition.wait(self, timeout)
    318 try:    # restore state no matter what (e.g., KeyboardInterrupt)
    319     if timeout is None:
--> 320         waiter.acquire()
    321         gotit = True
    322     else:

KeyboardInterrupt:
unitaryfund / mitiq

Slow RTD builds #2083
