Error from SNR optimizer

[titodalcanton]

This came from a trigger very close to the boundary of an analysis segment.

2023-03-30T08:08:06.360-07:00 Running with CPU support: 1 threads
2023-03-30T08:08:07.796-07:00 Starting optimize SNR
2023-03-30T08:08:07.804-07:00 Following up GID G970459
2023-03-30T08:08:07.807-07:00 Starting optimization
/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/scipy/optimize/_differentialevolution.py:382: UserWarning: differential_evolution: the 'workers' keyword has overridden updating='immediate' to updating='deferred'
  with DifferentialEvolutionSolver(func, bounds, args=args,
multiprocessing.pool.RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/multiprocessing/pool.py", line 48, in mapstar
    return list(map(*args))
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/scipy/_lib/_util.py", line 372, in __call__
    return self.f(x, *self.args)
  File "/home/pycbc.live/.conda/envs/o4-prod-env/bin/pycbc_optimize_snr", line 116, in compute_minus_network_snr
    nsnr, _ = compute_network_snr_core(v, *argv)
  File "/home/pycbc.live/.conda/envs/o4-prod-env/bin/pycbc_optimize_snr", line 105, in compute_network_snr_core
    snr_series = snr[onsource_slice] * norm
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/pycbc/types/array.py", line 65, in convert
    return func(self, *args, **kwargs)
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/pycbc/types/array.py", line 819, in __getitem__
    return self._getslice(index)
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/pycbc/types/timeseries.py", line 131, in _getslice
    raise ValueError(('Negative start index ({})'
ValueError: Negative start index (-1107) not supported
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/scipy/optimize/_differentialevolution.py", line 1123, in _calculate_population_energies
    self._mapwrapper(self.func, parameters_pop[0:S])
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/scipy/_lib/_util.py", line 442, in __call__
    return self._mapfunc(func, iterable)
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/multiprocessing/pool.py", line 364, in map
    return self._map_async(func, iterable, mapstar, chunksize).get()
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/multiprocessing/pool.py", line 771, in get
    raise self._value
ValueError: Negative start index (-1107) not supported

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/pycbc.live/.conda/envs/o4-prod-env/bin/pycbc_optimize_snr", line 348, in <module>
    opt_params = optimize_func(bounds, args, extra_args)
  File "/home/pycbc.live/.conda/envs/o4-prod-env/bin/pycbc_optimize_snr", line 133, in optimize_di
    results = differential_evolution(
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/scipy/optimize/_differentialevolution.py", line 397, in differential_evolution
    ret = solver.solve()
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/scipy/optimize/_differentialevolution.py", line 989, in solve
    self._calculate_population_energies(
  File "/home/pycbc.live/.conda/envs/o4-prod-env/lib/python3.9/site-packages/scipy/optimize/_differentialevolution.py", line 1129, in _calculate_population_energies
    raise RuntimeError(
RuntimeError: The map-like callable must be of the form f(func, iterable), returning a sequence of numbers the same length as 'iterable'

[spxiwh]

Do we have any way to reproduce this?

[spxiwh]

Just going through my to-do list: I'm happy to try and track this down this week, but would be great if the files that reproduce this are available (presumably behind LVK auth).

[titodalcanton]

I forget if we ever addressed this one… @maxtrevor?

[maxtrevor]

I forget if we ever addressed this one… @maxtrevor?

I don't think we did but there have been a lot of changes to the snr optimizer that may have inadvertently fixed it? I'm happy with closing this and reopening if this error ever crops up again.

[titodalcanton]

The error points to GID G970459, so this should be fairly easy to try and reproduce assuming that event has not been deleted. I might look into this later this month…