Hi,
I have reported in Nov of 2020 that dmtcp sometimes hangs with import of numpy
in python applications. I have since then found out that dmtcp sometimes hangs
with pykdtree, in the python code such as this one:
-------------------------------------------------------------
import numpy as np
from pykdtree.kdtree import KDTree
data_pts_real = np.array([[...]]) # details of data omitted
query_pts = np.array([[...]]) # details of data omitted
kdtree = KDTree(data_pts_real)
### this line sometimes causes the process to hang when run with
### dmtcp_launch python test_KDTree.py
dist, idx = kdtree.query(query_pts, sqr_dists=True)
print ('dist: ', dist)
print ('idx: ', idx)
-------------------------------------------------------------
What's interesting is, that dmtcp hangs sometimes with both numpy and pykdtree
(in Docker containers), sometimes only with pykdtree but not with numpy (on one
physical machine), and sometimes runs fine with both (on another physical
machine). This feels like it has to do with the installation of dmtcp, or the
overall run-time environment? I have been using Centos 7.
Anyone has the same experience? Any suggestions on how to fix this? Please help
me! This is an important part of an important project of mine. Thank you very
much in advance!
-Lei Pan
Jet Propulsion Laboratory
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