UltraNest
UltraNest copied to clipboard
`saved_logwt_bs` error after completion
- UltraNest version: 3.4.4
- Python version: 3.8.8
- Operating System: linux, hpc
Description
(let me preface by saying i love this piece of code)
i am solving a 6D fitting problem using ultranest
. Five are angles hence are wrapped parameters. One is a simple parameter.
i am running it on hpc with 480 tasks using MPI.
it crashes after it has converged to the ML point.
CHI : +0.000| +2.756 * | +3.142
NU : +0.00| +2.17 * +2.19 | +3.14
DELTA : +0.00| +1.88 * +1.91 | +3.14
TAU : +0.000| +1.569 * +1.577 | +6.283
PHI : +0.000| +3.799 * +3.803 | +6.283
OMEGA_SPIN: +0.050006283| +2.520271104 * +2.520271106 |+6.333179024
[ultranest] Explored until L=-2e+02 9.61 [-189.6137..-189.6128]*| it/evals=950560/566217664 eff=0.1679% N=16384
[ultranest] Likelihood function evaluations: 566217664
Traceback (most recent call last):
File "/hercules/results/sbethapudi/frbm/frb-modeling/python/run_precession_kp.py", line 171, in <module>
result = sampler.run (
File "/u/sbethapudi/.local/lib/python3.8/site-packages/ultranest/integrator.py", line 2173, in run
for result in self.run_iter(
File "/u/sbethapudi/.local/lib/python3.8/site-packages/ultranest/integrator.py", line 2539, in run_iter
self._update_results(main_iterator, saved_logl, saved_nodeids)
File "/u/sbethapudi/.local/lib/python3.8/site-packages/ultranest/integrator.py", line 2635, in _update_results
results = combine_results(
File "/u/sbethapudi/.local/lib/python3.8/site-packages/ultranest/netiter.py", line 897, in combine_results
recv_saved_logwt_bs = mpi_comm.gather(saved_logwt_bs, root=0)
File "mpi4py/MPI/Comm.pyx", line 1262, in mpi4py.MPI.Comm.gather
File "mpi4py/MPI/msgpickle.pxi", line 680, in mpi4py.MPI.PyMPI_gather
File "mpi4py/MPI/msgpickle.pxi", line 685, in mpi4py.MPI.PyMPI_gather
File "mpi4py/MPI/msgpickle.pxi", line 148, in mpi4py.MPI.Pickle.allocv
File "mpi4py/MPI/msgpickle.pxi", line 139, in mpi4py.MPI.Pickle.alloc
SystemError: Negative size passed to PyBytes_FromStringAndSize
This has happened during multiple runs with the same error. Looking through the traceback, it is failing in the gather step.
This happened after the iteration has completed.
In my code, after i run sampler.run
, i run store_tree,print_results,plot_corner
.
What I Did
these are my parameters for run
.
min_num_live_points=16384,
## target evidence uncertainty
dlogz=1e-1,
dKL=1e-1,
frac_remain=1E-9,
Lepsilon=1E-5,
## less than live_points
min_ess=8192,
max_num_improvement_loops=8,