Matthias Boehm created SYSTEMML-2098: ----------------------------------------
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} -- This message was sent by Atlassian JIRA (v7.6.3#76005)