Matthias Boehm created SYSTEMML-2098:
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Summary: Sparse result merge w/ empty in-place target hangs
Key: SYSTEMML-2098
URL: https://issues.apache.org/jira/browse/SYSTEMML-2098
Project: SystemML
Issue Type: Bug
Reporter: Matthias Boehm
For the following script, the parfor optimizer marks X for update in place,
which in turn causes its empty allocation in CSR. Merging the first sparse
matrix then hangs in an endless loop trying to allocate the target.
{code}
X = matrix(0, rows=10000, cols=10000);
parfor(i in 1:12, log=DEBUG) {
X += rand(rows=10000,cols=10000, sparsity=0.2, seed=7);
while(FALSE){}
print("iteration "+i);
}
print(sum(X));
{code}
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